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%_______________________________________________________________________
%
% Run random dot motion experiment defined in createDotInfo
%_______________________________________________________________________
%
% Input
%
% dotInfo | experiment configuration (struct)
% subj | identifier of subject (string)
% condSet | conditions (cell array of strings)
%_______________________________________________________________________
%
function dotsExperiment_JQK_170109(dotInfo, subj, condSet, DEBUG)
%%
%% sanitize function parameters
%%
if nargin == 0
eval('help dotsExperiment')
return
end
if not(exist('dotInfo','var'))
error('Missing input: dotInfo')
elseif isempty(dotInfo) || not(isstruct(dotInfo))
error('Invalid input: dotInfo (requires non-empty struct)')
end
if not(exist('subj','var'))
error('Missing input: subj')
elseif not(isempty(subj)) && ischar(subj)
dotInfo.subj = subj;
else
error('Invalid input: subj (requires non-empty string)')
end
if not(exist('condSet','var'))
error('Missing input: condSet')
elseif not(isempty(condSet)) && iscellstr(condSet) && min(cellfun(@length, condSet)) > 0
dotInfo.condSet = condSet;
else
error('Invalid input: condSet (requires cell array of non-empty strings)')
end
if not(isfield(dotInfo,'deployed'))
dotInfo.deployed = true;
end
%%
%% for saving behavioural data
%%
sessionFile = ['dotsX_behav_' subj '_' datestr(now, 'dd-mm-yyyy_HH-MM')];
sessionFile = fullfile(dotInfo.dataDir, sessionFile);
%%
%% prepare presentation
%%
displayList = Screen('screens');
displayIdx = displayList(1);
KbName('UnifyKeyNames'); % use portable key naming scheme
oldVerbosityLevel = Screen('Preference', 'Verbosity', 2); % show errors and warnings
arrowKeys = [dotInfo.keyLeft dotInfo.keyRight];
baseDotInfo = dotInfo; % keep for saving later
if DEBUG == 1
Screen('Preference', 'SkipSyncTests', 1);
PsychDebugWindowConfiguration(0, 0.2);
else
clear Screen; %PsychDebugWindowConfiguration([], 1);
end;
try
%%
%% prepare canvas
%%
screenInfo = openExperiment(50,50,displayIdx); clc; % open drawing canvas
if numel(Screen('screens')) == 1 || dotInfo.deployed
HideCursor(screenInfo.curWindow);
end
Screen('TextFont', screenInfo.curWindow, 'Helvetica');
Screen('TextSize', screenInfo.curWindow, 20);
Screen('TextStyle', screenInfo.curWindow, 0); % regular
Screen('TextColor', screenInfo.curWindow, 255); % white
% show intro only if not in debug mode
if dotInfo.introNumTrial && DEBUG == 0
exitSession = dotsIntroduction(dotInfo, screenInfo);
else
exitSession = false;
end
if exitSession
closeExperiment;
return
end
sessStartTime = GetSecs;
%%
%% condition start
%%
for s = 1:numel(condSet)
count = 0; % trial number
trialData = struct(); % result structure
% at the beginning of each condition reset coherence variables
dotInfo.lowStack = shiftStack(dotInfo.minCoh * ones(1,3));
dotInfo.highStack = shiftStack(dotInfo.maxCoh * ones(1,3));
dotInfo.coh = (dotInfo.lowStack.top + dotInfo.highStack.top)/2;
dotInfo.resp = '';
dotInfo.lastResp = '';
dotInfo.lastLongResp = '';
dotInfo.consecIdent = 0;
dotInfo.regress = false;
dotInfo.movAccuracy = NaN;
dotInfo.longMovAccuracy = NaN;
dotInfo.subjResponded = false;
% have the subject get ready for the next condition
DrawFormattedText(screenInfo.curWindow, 'ready?', 'center', 'center');
Screen('Flip', screenInfo.curWindow);
% wait for experimenter to resume session
while true
[exitSession, resumeSession] = checkKeys(dotInfo);
if resumeSession
break
elseif exitSession
closeExperiment;
return
end
end
%%
%% block start
%%
for b = 1:dotInfo.numBlock % two blocks per condition
dotInfo.stimMode = condSet{s};
if strcmp(dotInfo.stimMode, 'sham')
fprintf('> Noise off')
else
fprintf('> Noise %s', dotInfo.stimMode)
end
fprintf(' (%i/%i)\n\n', b, dotInfo.numBlock)
nextstep = 'checkdur'; % start with fixation
blockStart = GetSecs;
blockMax = dotInfo.blockTime;
done = 0;
while true
switch nextstep
% check if the block time elapsed
case 'checkdur'
blockTime = GetSecs - blockStart;
% exit block if the next trial could exceed maximum duration
if blockTime + dotInfo.maxDotTime + dotInfo.fixMaxTime >= blockMax
break
else
count = count + 1; % trial number
fprintf('%3i', count)
end
nextstep = 'fixation';
% show fixation dot
case 'fixation'
dotInfo.count = count;
dotInfo = randomDotTrial(dotInfo, trialData);
trialData(count).startTime = GetSecs - sessStartTime;
trialData(count).fixTime = dotInfo.fixTime;
trialData(count).corDir = find(dotInfo.dirSet == dotInfo.dir);
trialData(count).coh = dotInfo.coh;
trialData(count).dotDir = dotInfo.dir; % direction of dots
trialData(count).rxtime = NaN; % reaction time
trialData(count).lowStack = [dotInfo.lowStack.all];
trialData(count).highStack = [dotInfo.highStack.all];
trialData(count).regress = dotInfo.regress;
trialData(count).consecIdent = dotInfo.consecIdent;
trialData(count).lastResp = dotInfo.lastResp;
trialData(count).lastLongResp = dotInfo.lastLongResp;
targets = makeDotTargets(screenInfo, dotInfo); % initialize targets
trialStartTime = GetSecs;
showTargets(screenInfo, targets, 1);
waitTime = dotInfo.fixTime;
while true
% exit wait loop when time delay is met
if GetSecs - trialStartTime >= waitTime
nextstep = 'dots';
break
end
% stop experiment if exit key is pressed
exitSession = checkKeys(dotInfo);
if exitSession
fprintf('\n')
trialData(count) = [];
closeExperiment;
return
end
end
% show moving dots
case 'dots'
screenInfo.rseed = []; % to make different random dots for each trial
% response: 1 = left, 2 = right
[~, rseed, start_time, end_time, response, response_time] = dotsX_JQK_170113(screenInfo, dotInfo, targets);
trialData(count).rseed = rseed;
keyPressed = ~isnan(response{3});
keyDirection = response{3};
if keyPressed && keyDirection > 0
trialData(count).rxtime = response_time - start_time;
if keyDirection == trialData(count).corDir;
trialData(count).correct = 1;
fprintf(' | ok')
else
trialData(count).correct = 0;
fprintf(' | err')
end
else % no key was pressed
trialData(count).correct = 0;
fprintf(' | -')
end
correct = [trialData.correct];
rxtime = [trialData.rxtime];
correct = correct(not(isnan(rxtime))); % only trials with response
dotInfo.subjResponded = not(isnan(rxtime(end))); % responded in last trial
% short-term average accuracy
if numel(correct) >= dotInfo.winSize
dotInfo.movAccuracy = mean(correct(end-dotInfo.winSize+1:end));
end
% mid-term average accuracy
if numel(correct) >= dotInfo.longWinSize
dotInfo.longMovAccuracy = mean(correct(end-dotInfo.longWinSize+1:end));
end
trialData(count).movAccuracy = dotInfo.movAccuracy;
trialData(count).longMovAccuracy = dotInfo.longMovAccuracy;
if isnan(dotInfo.movAccuracy)
fprintf(' | acc: - ')
else
fprintf(' | acc: %3i',round(dotInfo.movAccuracy*100))
end
if isnan(dotInfo.longMovAccuracy)
fprintf(' | long: - ')
else
fprintf(' | long: %3i',round(dotInfo.longMovAccuracy*100))
end
fprintf(' | coh: %3i',round(dotInfo.coh))
lowStack = round(dotInfo.lowStack.all);
highStack = round(dotInfo.highStack.all);
numBlank = numel(num2str(count));
fprintf(' | %3i %3i %3i | %3i %3i %3i |', lowStack, highStack)
if dotInfo.regress
fprintf(' regress %s\n', dotInfo.regress)
dotInfo.regress = false;
else
fprintf('\n')
end
% exit experiment if trial was aborted
if keyPressed && keyDirection == -1
closeExperiment;
return
end
nextstep = 'checkdur';
end
end
% take a break after every block except after the last block
if not(s == numel(condSet) && b == dotInfo.numBlock)
while true
% exit wait loop when time delay is met
blockTime = GetSecs - blockStart;
if blockTime >= blockMax + dotInfo.breakTime
break
end
% stop experiment if exit key is pressed
exitSession = checkKeys(dotInfo);
if exitSession
fprintf('\n')
trialData(count) = [];
closeExperiment;
return
end
end
end
condData(s).stimMode = dotInfo.stimMode;
condData(s).trialData = trialData;
save(sessionFile, 'condData', 'baseDotInfo');
end % block
end % condition
% wait for a short moment before showing task complete message
outroStartTime = GetSecs;
waitTime = 1;
while true
% exit wait loop when time delay is met
if GetSecs - outroStartTime >= waitTime
break
end
% stop experiment if exit key is pressed
exitSession = checkKeys(dotInfo);
if exitSession
fprintf('\n')
closeExperiment;
return
end
end
% inform the subject that the experiment is over
DrawFormattedText(screenInfo.curWindow, 'task complete!', 'center', 'center');
Screen('Flip', screenInfo.curWindow);
sessTime = GetSecs - sessStartTime;
meanFixTime = mean([trialData.fixTime]);
numCorrect = numel(find([trialData.correct]));
numTrial = numel([trialData.correct]);
numResponded = numel(find(~isnan([trialData.rxtime])));
fprintf('\nTotal Time: %.2f\n', sessTime) % incl. block startup waits
fprintf('Average fixation: %.2fs\n', meanFixTime)
fprintf('Responded: %i/%i\n', numResponded, numTrial)
fprintf('Correct: %i/%i\n', numCorrect, numTrial)
fprintf('Accuracy: %.1f\n', 100*numCorrect/numResponded)
% wait for experimenter to close screen
while true
[exitKeyPressed, resumeKeyPressed] = checkKeys(dotInfo);
if exitKeyPressed || resumeKeyPressed
break
end
end
catch exception
getReport(exception) % show stack trace
end
closeExperiment; % close drawing canvas
Screen('Preference', 'Verbosity', oldVerbosityLevel); % restore verbosity
end