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staircase_task_Exo.m
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staircase_task_Exo.m
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% -------------------------------------------------------------------------
% @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
%% >>>>>>>>>>>>>>>>>>> N-Up-1-Down Staircasing <<<<<<<<<<<<<<<<<<<<<<
% @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
% -------------------------------------------------------------------------
% **** See García-Pérez (1998) for more information about staircasing ****
% -------------------------------------------------------------------------
function UpDn = staircase_task_Exo
% This function is meant to be used with OrientationWheelTask_v3
% There is a lot of code that is not needed for this task. This code
% orginally comes from tCAS_VisEntrain_Central_v5 and then the task was
% modified to better match the orientation wheel task. Therefore, there is
% a lot of unused code that is kept because it was part of one of those two
% original codes. Most of that unused code will be found in the local
% functions towards the end of this code (and will be saved in the prefs
% structure).
%
% For changing the actual staircasing of each subject, look to the
% parameters found in the UpDn structure.
%
%
%
% Information about typical stimulus color RGB values:
% (use uisetcolor to see them in a pop-up window)
% white = 255
% black = 0
% gray/background color = 127.5
% target color = 77.5
% mask color = 0
% entrainer color = 127.5 (no entrainers in this task)
%
% /////////////////////////////////////////////////////////////////////////
%
% ==== TRIGGERS ====
%
% -- Targets Present --
% Trial start (fixation): 1
% Entrainers: 61-68
% Cue:
% left: 2
% right: 3
% Target:
% left: 30
% right: 20
% Mask: 90
% Response screen Y/N: 25
% Response Yes: 180
% Response No: 185
% Response invalid: 150
%
%
% @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
% :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
% @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
try
prepareEnvironment;
% /////////////////////////////////////////////////////////////////////////
% -------------------------------------------------------------------------
% Input participant's number, name, date of testing, preferences
part_num = input('Participant Number:','s');
Filename = ['M:\Experiments\OrientWheel_Exo\Orient_Data\Staircasing\' part_num '_stair_exo.mat'];
% -------------------------------------------------------------------------
% /////////////////////////////////////////////////////////////////////////
window = openWindow(); %get info for psychtoolbox
prefs = getPreferences(); %get task variable info
% -------------------------------------------------------------------------
% Get presentation timing information
refresh = Screen('GetFlipInterval', window.onScreen); % Get flip refresh rate
slack = refresh/2; % Divide by 2 to get slack
% -------------------------------------------------------------------------
% Get rects for each item.
rects = cell(1, max(prefs.setSizes));
for i = 1:max(prefs.setSizes)
rects{i} = circularArrayRects([0, 0, prefs.squareSize, prefs.squareSize], ...
i, prefs.radius, window.centerX, window.centerY)';
end
% -------------------------------------------------------------------------
% Set default colors of stimuli
prefs.mask_gray = 0; %default is black
prefs.targ_gray = 0; %default is black
% -------------------------------------------------------------------------
% Center the target oval & cues on the centre of the screen
centeredRectresp = CenterRectOnPointd(prefs.baseCircleresp,window.centerX,window.centerY);
centeredRectrespR = CenterRectOnPointd(prefs.baseCircleresp,window.centerXR,window.centerY);
centeredRectrespL = CenterRectOnPointd(prefs.baseCircleresp,window.centerXL,window.centerY);
% -------------------------------------------------------------------------
% Create offscreen window with the texture of the mask
maskwin = createMasktex(window,prefs);
% -------------------------------------------------------------------------
% Get coordinates of the place holder
placeRect = createPlaceHolder(window,prefs);
% -------------------------------------------------------------------------
% Create offscreen window with the cues
CueL = createCueL(window); %create offscreen window with cue
CueR = createCueR(window); %create offscreen window with cue
% -------------------------------------------------------------------------
% Put up instructions for staircasing task and wait for keypress.
instruct_staircase(window,prefs);
% -------------------------------------------------------------------------
% Location of orientations on screen
orientWheelLocations = orientwheelLocations(window,prefs);
% -------------------------------------------------------------------------
% +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
% -------------------------------------------------------------------------
% +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
%% Set up the random mix of lags and target position and cue for each block
ntotaltrial = prefs.nTrials;
% Set up the random mix of lags for each block
all_lags = [1:prefs.n_lags];
if prefs.lags_per_block > 1
for i_lag = 2:prefs.lags_per_block
all_lags = [all_lags 1:prefs.n_lags];
end
end
i_lags = randperm(prefs.lags_per_block * (prefs.n_lags));
all_lags = all_lags(i_lags);
clear i_lag
%set up the right/left target location
position = 1;
for i_pos = 2:ntotaltrial
if i_pos <= round(ntotaltrial/2)
position = [position 1]; % 1 is right
else
position = [position 0]; % 0 is left
end
end
position = position(randperm(ntotaltrial));
%set up the valid/invalid cues (1=informative)
valid = 1;
validtrials = ntotaltrial*prefs.p_validity;
for i_valid = 2:ntotaltrial
if i_valid > round(validtrials)
valid = [valid 0];
else
valid = [valid 1];
end
end
clear i_valid
valid = valid(randperm(ntotaltrial));
% Pre-allocate some variables
allCoords_targ = cell(1,ntotaltrial);
trialOrient = cell(1,ntotaltrial);
% -------------------------------------------------------------------------
% @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
% +++++++++++++ Set-Up Structure UpDn for Staircasing +++++++++++++
% @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
% -------------------------------------------------------------------------
% Note. DECREASE in stimulus level = INCREASE in ability to see target
% (staircase procedures usually assume this is a positive relationship)
% >> up step = decrease difficulty = closer to black (RGB=0)
% >> down step = increase difficulty = closer to background (RGB=128)
% -------------------------------------------------------------------------
% :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
% Modifiable paramaters of the staircasing
% :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
% -------------------------------------------------------------------------
UpDn.xStartLevel = 77.5; %Initial target color: ~2/3 between background and black to make it easy
UpDn.xCurrent = UpDn.xStartLevel; %Stimulus level to be used on current trial
UpDn.sUp = 1; % Number of consecutive undetected responses after which stimulus difficulty decreases
% <<< after n trials with target undetected: target color - sSizeUp = darker target color (= easier to see)
UpDn.sDown = 2; % Number of consecutive detected responses after which stimulus difficulty increases
% <<< after n trials with target detected: target color + sSizeDown = lighter target color (= closer to background = harder to see)
% !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
% ``` Step Sizes ```
% !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
% Size of decrease in stimulus difficulty (-sSizeUp to reduce RGB value = darker target color).
UpDn.sSizeUp = [3 4 6]; %aiming for .55-.60: [2 6 4]
% Size of increase in stimulus difficulty (+sSizeDown to increase RGB value = lighter target color).
UpDn.sSizeDown = [3 5 5]; %aiming for .55-.60: [4 11 9]
% !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
% ---see García-Pérez (1998) about the ratio of sSizeDown/sSizeUp when using fixed step sizes---
% Use formula to determine step sizes to get targets proportion correct
% ii=1;
% targetP = (UpDn.sSizeUp(ii)./(UpDn.sSizeUp(ii)+UpDn.sSizeDown(ii))).^(UpDn.sUp./UpDn.sDown)
% !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
% *** Desired Proportion of Targets Detected ***
% UpDn.propDetect = .50;
UpDn.propDetect = .70;
UpDn.currProp = 0; % starting value for i_sRun = 1
% *** Define Rules for Termination of Staircasing ***
UpDn.stopType = 'trials'; % Can be either trials or revels
% When set to trials, staircase will terminate after the number of trials in stopRule.
% When set to revels, staircase will terminate after the number of reversals in stopRule.
% note. code is not currently set-up for reversals
% stopRule = Number of trials or reversals before run terminates
% set-up to have the total # of staircase trials equal to two experiment blocks
UpDn.nStairsRun = length(UpDn.sSizeUp); % # of blocks task will run
% want the total number of trials to be = 2*trials_per_block
UpDn.stopRule = round((2*prefs.trials_per_block) ./ UpDn.nStairsRun);
% Max stimulus level to be used in staircase.
%if set to empty ([]) no max is applied.
UpDn.xStimMax = window.gray - 2;
% Min stimulus intensity to be used in staircase.
%if set to empty ([]) no min is applied.
UpDn.xStimMin = 0; %black
trialIndex = 1; %trial counter (for compatability)
% \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
%% @@@@@@@@@@@@@@@@ Loop for multiple runs of staircasing @@@@@@@@@@@@@@@@@
% \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
for i_sRun = 1:UpDn.nStairsRun
% :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
% UpDn storage fields of each trials staircasing result
% :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
i_trial = 1; % restart at trial 1
% Contains stimulus level to be used on current trial
UpDn.xCurrent = UpDn.xStartLevel;
% Stores stimulus level on trials, and passes them to to UpDn.x
UpDn.x(i_sRun,i_trial) = UpDn.xCurrent;
% Stores stimulus level on trials
UpDn.xStairs(i_sRun,i_trial) = UpDn.x(i_sRun,i_trial);
UpDn.reverse(i_sRun,i_trial) = 0; % Stores for each trial whether a reversal occurred.
% It contains a 0 for trials where no reversal occurred.
% It contains the count of the reversal for trials where a reversal did occur.
% Counts the # of consecutive incorrect responses until Up rule is met (equals UpDn.sUp)
UpDn.u = 0; % Resets to 0 on the next trial
% Counts the # of consecutive correct responses until Down rule is met (equals UpDn.sDown)
UpDn.d = 0; % Resets to 0 on the next trial
% *** Used as a Termination Flag ***
UpDn.stop = 0; %reset to 0
% While stop criterion has not been reached, UpDn.stop = 0
% When stop criterion is reached, UpDn.stop = 1
% Get proportion detected before each run after the first run
if i_sRun > 1
[mR,nR] = size(UpDn.stairResp);
prev_trials = (mR.*nR); %total trials from previous
end
% +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
% /////////////////////////////////////////////////////////////////////////
%% === Run staircasing procedure until meet stop criteria ===
% /////////////////////////////////////////////////////////////////////////
% +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
% for i_trial = 1:UpDn.stopRule
while ~UpDn.stop %loop until stop criteria is met
% ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
% update record of proportion targets seen if not first block
if i_sRun > 1
[mR,nR] = size(UpDn.stairResp);
UpDn.currProp = sum(sum(UpDn.stairResp,2))./(prev_trials + (i_trial-1));
UpDn.detectP(i_sRun-1,i_trial) = UpDn.currProp; %to be saved
end
% ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
% Get lag id # for triggersw
lag = prefs.lags(all_lags(i_trial))/5;
% Determine how many items there are on this trial and the duration (this is left over code from original task)
nItems = 1; %should always be 1 because there will only be 1 target
retentionInterval = prefs.retentionIntervals;
% Pick the orientation for this trial.
trialOrient{trialIndex} = prefs.degslocs(prefs.selectorientTrial(i_trial));
% ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
% =========================================================================
% $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
% ++++++ Run Staircasing Task ++++++
% $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
% =========================================================================
%% Present Fixation
pause(window);
Screen('FillRect', window.onScreen, window.gray);
Screen('DrawDots', window.onScreen, [window.centerX, window.centerY], prefs.fixationSize, 255);
Screen('FrameOval', window.onScreen, prefs.mask_gray, placeRect); %placeholder
Screen('FillRect',window.onScreen, Vpixx2Vamp(1), prefs.trigger_size);
t_fixate_onset = Screen('Flip', window.onScreen);
% =========================================================================
%% Interval (refresh screen)
Screen('FillOval', window.onScreen, window.gray, rects{nItems});
Screen('DrawDots', window.onScreen, [window.centerX, window.centerY], prefs.fixationSize, 255); %keep fixation till target
Screen('FrameOval', window.onScreen, prefs.mask_gray, placeRect); %placeholder
Screen('FillRect',window.onScreen,Vpixx2Vamp(0),prefs.trigger_size);
Screen('Flip', window.onScreen);
% =========================================================================
%% Cue
if position(trialIndex) == 0
% present the Left cue
Screen('DrawTexture', window.onScreen, CueL, [], [], [], 0);
Screen('DrawDots', window.onScreen, [window.centerX, window.centerY], prefs.fixationSize, 255);%draw fixation
Screen('FrameOval', window.onScreen, prefs.mask_gray, placeRect); %placeholder
Screen('FillRect',window.onScreen,Vpixx2Vamp(2),prefs.trigger_size);
tcue_onset = Screen('Flip',window.onScreen,t_fixate_onset + prefs.fixation_length*refresh - slack);
prefs.fixation_time(trialIndex) = tcue_onset - t_fixate_onset;
else
% present the Right cue
Screen('DrawTexture', window.onScreen, CueR, [], [], [], 0);
Screen('DrawDots', window.onScreen, [window.centerX, window.centerY], prefs.fixationSize, 255);%draw fixation
Screen('FrameOval', window.onScreen, prefs.mask_gray, placeRect); %placeholder
Screen('FillRect',window.onScreen,Vpixx2Vamp(3),prefs.trigger_size);
tcue_onset = Screen('Flip',window.onScreen,t_fixate_onset + prefs.fixation_length*refresh - slack);
prefs.fixation_time(trialIndex) = tcue_onset - t_fixate_onset;
end
% Post-cue interval
Screen('FillOval', window.onScreen, window.gray, rects{nItems});
Screen('DrawDots', window.onScreen, [window.centerX, window.centerY], prefs.fixationSize, 255); %keep fixation till target
Screen('FrameOval', window.onScreen, prefs.mask_gray, placeRect); %placeholder
Screen('FillRect',window.onScreen,Vpixx2Vamp(0),prefs.trigger_size);
tblank_onset = Screen('Flip',window.onScreen,tcue_onset + prefs.cue_length*refresh - slack);
% =========================================================================
%% Entrainers
if prefs.n_entrs > 0
Screen('FillOval', window.onScreen, window.gray, rects{nItems});
Screen('DrawDots', window.onScreen, [window.centerX, window.centerY], prefs.fixationSize, 255); %keep fixation till target
Screen('FrameOval', window.onScreen, prefs.mask_gray, placeRect); %placeholder
Screen('FillRect',window.onScreen,Vpixx2Vamp(61),prefs.trigger_size);
tentr_onset = Screen(window.onScreen, 'Flip', tblank_onset + prefs.preblank_length*refresh - slack);
if prefs.n_entrs > 1
for i_entr = 2:prefs.n_entrs
Screen('FillOval', window.onScreen, window.gray, rects{nItems});
Screen('FillRect',window.onScreen,Vpixx2Vamp(0),prefs.trigger_size);
tblank_onset = Screen(window.onScreen, 'Flip', tentr_onset + prefs.entr_length*refresh - slack);
Screen('FillOval', window.onScreen, (prefs.entr_grey+window.gray),...
[rects{nItems}(1)-prefs.maskwidth, rects{nItems}(2)-prefs.maskwidth,rects{nItems}(3)+prefs.maskwidth,...
rects{nItems}(4)+prefs.maskwidth]);
Screen('FillOval', window.onScreen, window.gray, rects{nItems});
Screen('FrameOval', window.onScreen, prefs.mask_gray, placeRect); %placeholder
Screen('FillRect',window.onScreen,Vpixx2Vamp(60 + i_entr),prefs.trigger_size);
tentr_onset = Screen(window.onScreen, 'Flip', tblank_onset + prefs.entr_gap_length*refresh - slack);
end
end
end
% =========================================================================
%% Lag
Screen('FillOval', window.onScreen, window.gray, rects{nItems});
Screen('DrawDots', window.onScreen, [window.centerX, window.centerY], prefs.fixationSize, 255); %keep fixation till target
Screen('FrameOval', window.onScreen, prefs.mask_gray, placeRect); %placeholder
Screen('FillRect',window.onScreen,Vpixx2Vamp(0),prefs.trigger_size);
tlag_onset = Screen(window.onScreen, 'Flip', tentr_onset + prefs.entr_length*refresh - slack);
% =========================================================================
%% Draw the target stimulus
yadj = prefs.orientwheel(2,trialOrient{trialIndex}); %adjust lines y position
xadj = prefs.orientwheel(1,trialOrient{trialIndex}); %adjust lines x position
yadj2 = prefs.orientwheel2(2,trialOrient{trialIndex}); %adjust lines y position
xadj2 = prefs.orientwheel2(1,trialOrient{trialIndex}); %adjust lines x position
% Set the coordinates (these are all relative to zero we will let
% the drawing routine center it for us)
xCoords = [xadj -xadj2 xadj xadj2 xadj 0];
yCoords = [yadj yadj2 yadj -yadj2 yadj 0];
allCoords_targ{trialIndex} = [xCoords; yCoords];
% =========================================================================
%% Right Target
if position(trialIndex) == 1 %right target
% Draw the orientation lines, set it to the center of our screen and set good quality antialiasing
Screen('DrawLines', window.onScreen, allCoords_targ{trialIndex}, prefs.lineWidthPix, UpDn.xCurrent, [window.centerXR window.centerY], 2);
% Draw the central circle to the screen
Screen('FillOval', window.onScreen, UpDn.xCurrent, centeredRectrespR');
% Draw fixation
Screen('DrawDots', window.onScreen, [window.centerX, window.centerY], prefs.fixationSize, 255);
Screen('FrameOval', window.onScreen, prefs.mask_gray, placeRect); %placeholder
% Draw trigger
Screen('FillRect',window.onScreen,Vpixx2Vamp(20),prefs.trigger_size);
% =========================================================================
else
%% Left Target
% Draw the orientation lines, set it to the center of our screen and set good quality antialiasing
Screen('DrawLines', window.onScreen, allCoords_targ{trialIndex}, prefs.lineWidthPix, UpDn.xCurrent, [window.centerXL window.centerY], 2);
% Draw the central circle to the screen
Screen('FillOval', window.onScreen, UpDn.xCurrent, centeredRectrespL');
% Draw fixation
Screen('DrawDots', window.onScreen, [window.centerX, window.centerY], prefs.fixationSize, 255);
Screen('FrameOval', window.onScreen, prefs.mask_gray, placeRect); %placeholder
% Draw trigger
Screen('FillRect',window.onScreen,Vpixx2Vamp(30),prefs.trigger_size);
end
% =========================================================================
%% Post the stimulus
ttarget_onset = Screen('Flip', window.onScreen, tlag_onset + prefs.lagISI(all_lags(trialIndex))*refresh - slack);
% =========================================================================
%% Interval
Screen('FillOval', window.onScreen, window.gray, rects{nItems});
%draw fixation
Screen('DrawDots', window.onScreen, [window.centerX, window.centerY], prefs.fixationSize, 255);
Screen('FrameOval', window.onScreen, prefs.mask_gray, placeRect); %placeholder
Screen('FillRect',window.onScreen,Vpixx2Vamp(0),prefs.trigger_size);
tISI_onset = Screen('Flip', window.onScreen, ttarget_onset + prefs.targ_length*refresh - slack);
% =========================================================================
%% Mask
Screen('DrawTexture', window.onScreen, maskwin, [], [], [], 0);
%draw fixation
Screen('DrawDots', window.onScreen, [window.centerX, window.centerY], prefs.fixationSize, 255);
Screen('FrameOval', window.onScreen, prefs.mask_gray, placeRect); %placeholder
Screen('FillRect',window.onScreen,Vpixx2Vamp(90),prefs.trigger_size);
t_maskonset = Screen('Flip', window.onScreen, tISI_onset + prefs.maskISI*refresh - slack);
% =========================================================================
%% Retention Interval
Screen('FillOval', window.onScreen, window.gray, rects{nItems});
Screen('DrawDots', window.onScreen, [window.centerX, window.centerY], prefs.fixationSize, 255); %Draw fixation
Screen('FrameOval', window.onScreen, prefs.mask_gray, placeRect); %placeholder
Screen('FillRect',window.onScreen,Vpixx2Vamp(0),prefs.trigger_size);
Screen('Flip', window.onScreen, t_maskonset + prefs.mask_length*refresh - slack);
% Retention interval
WaitSecs(retentionInterval);
% =========================================================================
%% Response
UpDn.presentedOrientDegrees(i_sRun,i_trial) = trialOrient{trialIndex};
Screen('FillRect',window.onScreen, Vpixx2Vamp(25), prefs.trigger_size);
Screen('Flip', window.onScreen)
%one more refresh to clear triggers
Screen('FillRect',window.onScreen,window.black,prefs.trigger_size);
Screen('Flip', window.onScreen);
t1 = GetSecs; %record for RT
% Get key press
keyIsDown = 0;
while ~keyIsDown
[keyIsDown, secs, keyCode] = KbCheck;
end
% Keep a log of the subject's responses
response = find(keyCode>0); %1 is 49, 5 is 53, left arrow is 37, right is 39
% detected (left arrow)
if response == 37
% Stores responses for all staircasing trials
UpDn.stairResp(i_sRun,i_trial) = 1; %detected
Screen('FillRect',window.onScreen, Vpixx2Vamp(180), prefs.trigger_size);
res_trig = Screen('Flip',window.onScreen,[],0);
% undetected (right arrow)
elseif response == 39
% Stores responses for all staircasing trials
UpDn.stairResp(i_sRun,i_trial) = 0; %undetected
Screen('FillRect',window.onScreen, Vpixx2Vamp(185), prefs.trigger_size);
res_trig = Screen('Flip',window.onScreen,[],0);
else
% Stores responses for all staircasing trials
UpDn.stairResp(i_sRun,i_trial) = 9; %NULL
Screen('FillRect',window.onScreen, Vpixx2Vamp(150), prefs.trigger_size);
res_trig = Screen('Flip',window.onScreen,[],0);
end
% Blank
% Screen('CopyWindow',blank ,window,rect,rect);
Screen('FillRect',window.onScreen,Vpixx2Vamp(0),prefs.trigger_size);
Screen(window.onScreen,'Flip',res_trig + refresh - slack);
% =========================================================================
% Compute and store response time
UpDn.subject_rt(i_sRun,i_trial) = secs-t1;
% /////////////////////////////////////////////////////////////////////////
% \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
%% <<<<<<<<<<<<<<<< Update UpDn Structure >>>>>>>>>>>>>>>>>>>>>>>>>>>
% /////////////////////////////////////////////////////////////////////////
% \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
%% Target Detected (step down = increase difficulty = darken target)
if i_trial == 1
if UpDn.stairResp(i_sRun,i_trial) == 1
% If a reversal happened on the current trial, contains the direction of that reversal
UpDn.direction = -1;
else
UpDn.direction = 1;
end
end
%% IF DETECTED...
if UpDn.stairResp(i_sRun,i_trial) == 1
UpDn.d = UpDn.d + 1; %detections counter
% NO CHANGE IN TARGET COLOR:
% If reach desired proportion and step rule has not been met
% if ((UpDn.currProp == UpDn.propDetect) && i_sRun > 1) && UpDn.d ~= UpDn.sDown %No step down change
if UpDn.d ~= UpDn.sDown %No step down change if step rule has not been met
UpDn.xStairs(i_sRun,i_trial+1) = UpDn.xStairs(i_sRun,i_trial); %for next trial
% CHANGE IN TARGET COLOR:
% ~~TRUE if d counter == step down rule ||or|| reversal has not yet occurred
% ||or|| after 1st run, proportion detected > desired proportion detected
% elseif UpDn.d == UpDn.sDown || max(UpDn.reverse(i_sRun),[],2) < 1 ||...
% ((UpDn.currProp > UpDn.propDetect) && i_sRun > 1)
elseif UpDn.d == UpDn.sDown || max(UpDn.reverse(i_sRun),[],2) < 1
%% Step down change = target color + step down size (increasing color #)
% New target color
UpDn.xStairs(i_sRun,i_trial+1) = UpDn.xStairs(i_sRun,i_trial) + UpDn.sSizeDown(i_sRun);
if UpDn.xStairs(i_sRun,i_trial+1) > UpDn.xStimMax %target can't be darker than background
UpDn.xStairs(i_sRun,i_trial+1) = UpDn.xStimMax;
end
UpDn.u = 0; %reset when there is a reversal
UpDn.d = 0; %reset when there is a reversal
UpDn.reverse(i_sRun,i_trial) = 0;
if UpDn.direction == 1
UpDn.reverse(i_sRun,i_trial) = sum(UpDn.reverse(i_sRun,i_trial)~=0) + 1;
else
UpDn.reverse(i_sRun,i_trial) = 0;
end
UpDn.direction = -1;
else %No step down change
UpDn.xStairs(i_sRun,i_trial+1) = UpDn.xStairs(i_sRun,i_trial);
end
else %% IF UNDETECTED...
UpDn.u = UpDn.u + 1; %undetected counter
% NO CHANGE IN TARGET COLOR:
% If reach desired proportion or step rule has not been met
% if ((UpDn.currProp == UpDn.propDetect) && i_sRun > 1) && UpDn.u ~= UpDn.sUp %No step down change
if UpDn.u ~= UpDn.sUp %No step down change if step rule has not been met
UpDn.xStairs(i_sRun,i_trial+1) = UpDn.xStairs(i_sRun,i_trial);
% CHANGE IN TARGET COLOR:
% ~~TRUE if d counter == step up rule ||or|| reversal has not yet occurred
% elseif UpDn.u == UpDn.sUp || max(UpDn.reverse(i_sRun),[],2) < 1 ||...
% ((UpDn.currProp < UpDn.propDetect) && i_sRun > 1)
elseif UpDn.u == UpDn.sUp || max(UpDn.reverse(i_sRun),[],2) < 1
%% Step up change = target color - step up size (decrease color #)
% New target color
UpDn.xStairs(i_sRun,i_trial+1) = UpDn.xStairs(i_sRun,i_trial)- UpDn.sSizeUp(i_sRun);
if UpDn.xStairs(i_sRun,i_trial+1) < UpDn.xStimMin %target's color limit is white
UpDn.xStairs(i_sRun,i_trial+1) = UpDn.xStimMin;
end
UpDn.u = 0; %reset when there is a reversal
UpDn.d = 0; %reset when there is a reversal
UpDn.reverse(i_sRun,i_trial) = 0;
if UpDn.direction == -1
UpDn.reverse(i_sRun,i_trial) = sum(UpDn.reverse(i_sRun,i_trial)~=0) + 1;
else
UpDn.reverse(i_sRun,i_trial) = 0;
end
UpDn.direction = 1;
else %No step up change
UpDn.xStairs(i_sRun,i_trial+1) = UpDn.xStairs(i_sRun,i_trial);
end
end
% When to stop this run
if strncmpi(UpDn.stopType,'reversals',4) &&...
sum(UpDn.reversal(i_sRun,i_trial)~=0) == UpDn.stopRule
UpDn.stop = 1;
end
if strncmpi(UpDn.stopType,'trials',4) && i_trial == UpDn.stopRule
UpDn.stop = 1;
end
% If we didn't stop, update x variable
if ~UpDn.stop
UpDn.x(i_sRun,i_trial+1) = UpDn.xStairs(i_sRun,i_trial+1);
if UpDn.x(i_sRun,i_trial+1) >= UpDn.xStimMax %limit color to darker than backgorund
UpDn.x(i_sRun,i_trial+1) = UpDn.xStimMax;
elseif UpDn.x(i_sRun,i_trial+1) < UpDn.xStimMin %limit color to lighter than black
UpDn.x(i_sRun,i_trial+1) = UpDn.xStimMin;
end
UpDn.xCurrent = UpDn.x(i_sRun,i_trial+1); %update
end
i_trial = 1 + i_trial; %UpDn trial counter
trialIndex = 1 + trialIndex; %Orientwheel trial counter
WaitSecs(0.5); %wait 1/2 second before next trial
end %while loop for meeting stop criteria
% |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
% +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
% For Reference: determine and display targeted proportion correct and stimulus intensity
% targetP = (UpDn.sSizeUp(i_sRun)./(UpDn.sSizeUp(i_sRun)+UpDn.sSizeDown(i_sRun))).^(1./UpDn.sDown)
% targetX = PAL_Gumbel(trueParams, targetP,'inverse');
% |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
% +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
if i_sRun < UpDn.nStairsRun %take a break
rest(window);
elseif i_sRun == UpDn.nStairsRun %end of task
finish(window);
end
end %Loop for running multiple staircasing blocks
clear i_trial i_sRun
% $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
% +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
% $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
%% Record info for later analysis
% Record that target was present
% Total number of trials across all runs = i_trial
UpDn.subject_present(1,1:trialIndex) = 1;
% Record responses for later analysis
strial = 1;
for run = 1:UpDn.nStairsRun
for tri = 1:UpDn.stopRule
UpDn.subject_answer_all(1,strial) = UpDn.stairResp(run,tri);
UpDn.subject_rt_all(1,strial) = UpDn.subject_rt(run,tri);
strial = strial + 1;
end
clear tri
end
% +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
%% Final target color (average of all the runs)
xtarget = round(mean(UpDn.x(1:UpDn.nStairsRun,length(UpDn.x))));
% if our final proportion detected is off
% detdiff = round(mean(UpDn.detectP(1:size(UpDn.detectP),length(UpDn.x)))) - UpDn.propDetect;
% if detdiff > 0.08 %detection rate too high
% xtarget = xtarget + 5; %5 points closer to grey
% elseif detdiff < 0.08 %detection rate too low
% xtarget = xtarget - 5; %5 points darker than grey
% end
% To later record the target color
UpDn.targ_grey = xtarget;
% =========================================================================
% =========================================================================
save(Filename, 'prefs', 'UpDn', 'xtarget');
postpareEnvironment;
% =========================================================================
% =========================================================================
catch
postpareEnvironment;
psychrethrow(psychlasterror);
end % end try/catch
% =========================================================================
% =========================================================================
end % end whole script
% +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
% #########################################################################
% +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
% =========================================================================
% -------------------------------------------------------------------------
% #########################################################################
% #########################################################################
% -------------------------------------------------------------------------
% =========================================================================
% +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
% #########################################################################
% +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
function prepareEnvironment
ccc
HideCursor; % Comment out when debugging
commandwindow; % Select the command window to avoid typing in open scripts
% Seed the random number generator.
% RandStream.setDefaultStream(RandStream('mt19937ar', 'seed', sum(100*clock)));
RandStream.setGlobalStream(RandStream('mt19937ar', 'seed', sum(100*clock)));
% ListenChar(2); % Don't print to MATLAB command window
% Screen('Preference', 'SkipSyncTests', 1); %choose 1 for test on an LCD
% /////////////////////////////////////////////////////////////////////////
%% Set up parallel port (for when triggers are sent with Vpixx2Vamp)
%initialize the inpoutx64 low-level I/O driver
config_io;
%optional step: verify that the inpoutx64 driver was successfully installed
global cogent;
if( cogent.io.status ~= 0 )
error('inp/outp installation failed');
end
%write a value to the default LPT1 printer output port (at 0x378)
address_eeg = hex2dec('B010');
outp(address_eeg,0); %set pins to zero
% /////////////////////////////////////////////////////////////////////////
end
% -------------------------------------------------------------------------
% #########################################################################
% -------------------------------------------------------------------------
%% End of experiment
function postpareEnvironment
ShowCursor;
% ListenChar(0);
Screen('CloseAll');
end
% -------------------------------------------------------------------------
% #########################################################################
% -------------------------------------------------------------------------
%% Gives the subject a set of instructions about the staircasing task
function instruct_staircase(window,prefs)
%Screen 1
% prefs = getPreferences();
Screen('TextSize', window.onScreen, window.fontsize);
Screen('DrawText', window.onScreen, 'You are going to be asked to perform a visual task.',(window.centerX-400),(window.centerY+20), 255);
Screen('DrawText', window.onScreen, 'The next few screens will briefly explain the first task.',...
(window.centerX-400),(window.centerY+50), 255); %line every +30
Screen('DrawText', window.onScreen, 'On each screen press any key to continue.',(window.centerX-400),(window.centerY+80), 255); %line every +25
Screen('FillRect',window.onScreen, Vpixx2Vamp(0), prefs.trigger_size);
Screen('Flip', window.onScreen);
% GetClicks(window.onScreen);
WaitSecs(1);
KbWait %wait for subject to press button
%Screen 2
Screen('TextSize', window.onScreen, window.fontsize);
Screen('DrawText', window.onScreen, 'A fixation dot will appear. Please remain focused on the white central dot during the ENTIRE task.',...
(window.centerX-600),(window.centerY+50), 255);
Screen('DrawDots', window.onScreen, [window.centerX, window.centerY], prefs.fixationSize, 255); %255 is text color (white)
Screen('FillRect',window.onScreen, Vpixx2Vamp(0), prefs.trigger_size);
%place holder
placeRect = createPlaceHolder(window,prefs);
Screen('FrameOval', window.onScreen, prefs.mask_gray, placeRect);
Screen('Flip', window.onScreen);
WaitSecs(1);
KbWait %wait for subject to press button
%Screen 2.2
Screen('TextSize', window.onScreen, window.fontsize);
% CueL = createCueL(window,prefs); %create offscreen window with cue
CueR = createCueR(window); %create offscreen window with cue
Screen('DrawTexture', window.onScreen, CueR, [], [], [], 0);
Screen('DrawText', window.onScreen, 'An arrow will then briefly appear.',...
(window.centerX-400),(window.centerY+50), 255);
Screen('DrawText', window.onScreen, 'The arrow may be pointing right...',...
(window.centerX-400),(window.centerY+80), 255); %line every +30
%place holder
placeRect = createPlaceHolder(window,prefs);
Screen('FrameOval', window.onScreen, prefs.mask_gray, placeRect);
%put stimulus and text on screen
Screen('FillRect',window.onScreen, Vpixx2Vamp(0), prefs.trigger_size);
Screen('Flip', window.onScreen);
WaitSecs(1);
KbWait %wait for subject to press button
%Screen 2.3
Screen('TextSize', window.onScreen, window.fontsize);
CueL = createCueL(window); %create offscreen window with cue
% CueR = createCueR(window,prefs); %create offscreen window with cue
Screen('DrawTexture', window.onScreen, CueL, [], [], [], 0);
Screen('DrawText', window.onScreen, 'Or, the arrow may be pointing left',...
(window.centerX-400),(window.centerY+50), 255);
Screen('DrawText', window.onScreen, 'The arrow indicates the side a target stimulus will most likely appear.',...
(window.centerX-400),(window.centerY+80), 255); %line every +30
Screen('DrawText', window.onScreen, 'While keeping your eyes focused on the center,',...
(window.centerX-400),(window.centerY+110), 255); %line every +30
Screen('DrawText', window.onScreen, 'pay attention COVERTLY (without moving your eyes) to the circle on the side the arrow is pointing.',...
(window.centerX-400),(window.centerY+140), 255); %line every +30
%place holder
placeRect = createPlaceHolder(window,prefs);
Screen('FrameOval', window.onScreen, prefs.mask_gray, placeRect);
%put stimulus and text on screen
Screen('FillRect',window.onScreen, Vpixx2Vamp(0), prefs.trigger_size);
Screen('Flip', window.onScreen);
WaitSecs(1);
KbWait %wait for subject to press button
%Screen 3
Screen('TextSize', window.onScreen, window.fontsize);
Screen('DrawText', window.onScreen, 'The arrow will disappear and a target pointing in a certain direction will briefly appear inside the circle on the left OR right.',...
(window.centerX-600),(window.centerY+50), 255);
Screen('DrawText', window.onScreen, 'Your task is to try to detect which direction the target is pointing.',...
(window.centerX-400),(window.centerY+80), 255); %line every +30
Screen('DrawText', window.onScreen, 'It might be difficult to see the target, but still try your best.',...
(window.centerX-400),(window.centerY+110), 255); %line every +30
%---draw target stimulus---
xCoords = [15 1.73 15 -1.73 15 0];
yCoords = [-25.98 1 -25.98 -1 -25.98 0];
allCoords_targ = [xCoords; yCoords];
%right target
Screen('DrawLines', window.onScreen, allCoords_targ, prefs.lineWidthPix, prefs.targ_gray, [window.centerXR window.centerY], 2);
centeredRectresp = CenterRectOnPointd([0,0,10,10], window.centerXR, window.centerY); %location of center for oval
Screen('FillOval', window.onScreen, prefs.targ_gray, centeredRectresp');
%left target
Screen('DrawLines', window.onScreen, allCoords_targ, prefs.lineWidthPix, prefs.targ_gray, [window.centerXL window.centerY], 2);
centeredRectresp = CenterRectOnPointd([0,0,10,10], window.centerXL, window.centerY); %location of center for oval
Screen('FillOval', window.onScreen, prefs.targ_gray, centeredRectresp');
%place holder
placeRect = createPlaceHolder(window,prefs);
Screen('FrameOval', window.onScreen, prefs.mask_gray, placeRect);
%put stimulus and text on screen
Screen('FillRect',window.onScreen, Vpixx2Vamp(0), prefs.trigger_size);
Screen('Flip', window.onScreen);
WaitSecs(1);
KbWait %wait for subject to press button
%Screen 4
Screen('TextSize', window.onScreen, window.fontsize);
maskwin = createMasktex(window,prefs); %create offscreen window with mask
Screen('DrawTexture', window.onScreen, maskwin, [], [], [], 0);
Screen('DrawText', window.onScreen, 'A star-like shape will then quickly appear and then disappear.',...
(window.centerX-400),(window.centerY+50), 255);
Screen('DrawText', window.onScreen, 'Remember that you want to detect the pointing target, not the star.',...
(window.centerX-400),(window.centerY+80), 255); %line every +30
%place holder
placeRect = createPlaceHolder(window,prefs);
Screen('FrameOval', window.onScreen, prefs.mask_gray, placeRect);
Screen('FillRect',window.onScreen,Vpixx2Vamp(0),prefs.trigger_size);
Screen('Flip', window.onScreen);
WaitSecs(1);
KbWait %wait for subject to press button
%Screen 5
%draw target stimulus
xCoords = [-21.21 -1.41 -21.21 1.41 -21.21 0];
yCoords = [21.21 -1.41 21.21 1.41 21.21 0];
allCoords_targ = [xCoords; yCoords];
Screen('DrawLines', window.onScreen, allCoords_targ, prefs.lineWidthPix, prefs.targ_gray, [window.centerX window.centerY], 2);
centeredRectresp = CenterRectOnPointd([0,0,10,10], window.centerX, window.centerY);
Screen('FillOval', window.onScreen, prefs.targ_gray, centeredRectresp');
Screen('TextSize', window.onScreen, window.fontsize);
Screen('DrawText', window.onScreen, 'Press the LEFT arrow if you can see the target.',(window.centerX-880),(window.centerY-50), 255);
Screen('DrawText', window.onScreen, 'Press the RIGHT arrow if you only see the star',(window.centerX-880),(window.centerY), 255);
Screen('DrawText', window.onScreen, 'If you are unsure whether the pointing target was there,',(window.centerX-880),(window.centerY+60), 255);
Screen('DrawText', window.onScreen, 'please provide your best guess.',(window.centerX-880),(window.centerY+90), 255);
Screen('FillRect',window.onScreen, Vpixx2Vamp(0), prefs.trigger_size);
Screen('Flip', window.onScreen);
WaitSecs(1);
KbWait %wait for subject to press button
%Screen 6
Screen('TextSize', window.onScreen, window.fontsize);
Screen('DrawText', window.onScreen, 'Remember...Press the LEFT arrow if you see any indication of the pointing target being present.',(window.centerX-400),(window.centerY+20), 255);
Screen('DrawText', window.onScreen, 'Press the RIGHT arrow if you do NOT see the pointing target.',(window.centerX-400),(window.centerY+50), 255);
Screen('DrawText', window.onScreen, 'Press any key when you are ready to start.',(window.centerX-400),(window.centerY+80), 255);
Screen('FillRect',window.onScreen, Vpixx2Vamp(0), prefs.trigger_size);
Screen('Flip', window.onScreen);
WaitSecs(1);
KbWait %wait for subject to press button
end %end function instruct_staircase
% -------------------------------------------------------------------------
% #########################################################################
% -------------------------------------------------------------------------
function pause(window)
prefs = getPreferences();
Screen('FillRect', window.onScreen, window.gray);
Screen('FillRect',window.onScreen, Vpixx2Vamp(0), prefs.trigger_size);
Screen('Flip', window.onScreen);
WaitSecs(0.5);
end
% -------------------------------------------------------------------------
% #########################################################################
% -------------------------------------------------------------------------
function rest(window)
prefs = getPreferences();
%Screen 1
Screen('TextSize', window.onScreen, window.fontsize);
Screen('DrawText', window.onScreen, 'Feel free to take a break at this time.',...
(window.centerX-400),(window.centerY+20), 255);
Screen('FillRect',window.onScreen, Vpixx2Vamp(0), prefs.trigger_size);
Screen('Flip', window.onScreen);
% GetClicks(window.onScreen);
WaitSecs(1);
KbWait %wait for subject to press button
%Screen 2
Screen('TextSize', window.onScreen, window.fontsize);
Screen('DrawText', window.onScreen, 'Remember...Press the LEFT arrow if you see any indication of the pointing target being present.',(window.centerX-400),(window.centerY+20), 255);
Screen('DrawText', window.onScreen, 'Press the RIGHT arrow if you do NOT see the pointing target.',(window.centerX-400),(window.centerY+50), 255);
Screen('DrawText', window.onScreen, 'Press any key when you are ready to continue.',(window.centerX-400),(window.centerY+80), 255);
Screen('FillRect',window.onScreen, Vpixx2Vamp(0), prefs.trigger_size);
Screen('Flip', window.onScreen);
% GetClicks(window.onScreen);
WaitSecs(1);
KbWait %wait for subject to press button
WaitSecs(1);
end
% -------------------------------------------------------------------------
% #########################################################################
% -------------------------------------------------------------------------
function finish(window)
prefs = getPreferences();
Screen('TextSize', window.onScreen, window.fontsize);
Screen('DrawText', window.onScreen, 'You are now finished with the task.',(window.centerX-400),(window.centerY+20), 255);
Screen('DrawText', window.onScreen, 'Please let the experimenter know by using the call box.',(window.centerX-400),(window.centerY+50), 255);
Screen('FillRect',window.onScreen, Vpixx2Vamp(0), prefs.trigger_size);
Screen('Flip', window.onScreen);
% GetClicks(window.onScreen);
KbWait; %wait for subject to press button
end
% -------------------------------------------------------------------------
% #########################################################################
% -------------------------------------------------------------------------
function offsets = circularArrayOffsets(n, centerX, centerY, radius, rotation)
degreeStep = 360/n;
offsets = [sind(0:degreeStep:(360-degreeStep) + rotation)'.* radius, ...
cosd(0:degreeStep:(360-degreeStep) + rotation)'.* radius];
end
% -------------------------------------------------------------------------
% #########################################################################
% -------------------------------------------------------------------------
function rects = circularArrayRects(rect, nItems, radius, centerX, centerY)
coor = circularArrayOffsets(nItems, centerX, centerY, radius, 0) + repmat([centerX centerY], nItems, 1);
rects = [coor(:, 1)-rect(3)/2 , coor(:, 2)-rect(3)/2, coor(:, 1)+rect(3)/2, coor(:, 2)+rect(3)/2];
end
% -------------------------------------------------------------------------
% #########################################################################
% -------------------------------------------------------------------------
%% ~~~ Open the main window and get dimensions ~~~
function window = openWindow()
window.screenNumber = max(Screen('Screens'));
window.onScreen = Screen('OpenWindow', window.screenNumber, [127.5 127.5 127.5]);
Screen('BlendFunction', window.onScreen, 'GL_SRC_ALPHA', 'GL_ONE_MINUS_SRC_ALPHA');
[window.screenX, window.screenY] = Screen('WindowSize', window.onScreen); % check resolution
window.screenRect = [0, 0, window.screenX, window.screenY]; % screen rect
window.centerX = window.screenX * 0.5; % center of screen in X direction
window.centerY = window.screenY * 0.5; % center of screen in Y direction
window.centerXL = floor(mean([0, window.centerX])); % center of left half of screen in X direction
window.centerXR = floor(mean([window.centerX, window.screenX])); % center of right half of screen in X direction
% targets need to be closer to the center (~6.3 degrees of arc)
window.centerXL = floor(mean([window.centerXL, window.centerX])); % center of the center left half of screen in X direction