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runMeridians.m
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% MATLAB script to run CriticalSpacing.m
% Copyright 2015,2016, Denis G. Pelli, [email protected]
% We recommend leaving the boilerplate header alone, and customizing by
% copying lines from the boilerplate to your customized section at the
% bottom and modifying it there. This facilitates comparison of scripts.
%% BOILERPLATE HEADER
clear o
% PROCEDURE
o.easyBoost=0.3; % Increase the log threshold parameter of easy trials by this much.
o.experimenter=''; % Put name here to skip the runtime question.
o.flipScreenHorizontally=0; % Set to 1 when using a mirror.
o.fractionEasyTrials=0;
o.observer=''; % Put name here to skip the runtime question.
o.permissionToChangeResolution=0; % Works for main screen only, due to Psychtoolbox bug.
o.getAlphabetFromDisk=1; % 1 makes the program more portable.
o.secsBeforeSkipCausesGuess=8;
o.takeSnapshot=0; % To illustrate your talk or paper.
o.task='identify';
o.textFont='Arial';
o.textSizeDeg=0.4;
o.thresholdParameter='spacing'; % 'spacing' or 'size'
o.trialsDesired=20; % Number of trials (i.e. responses) for the threshold estimate.
o.viewingDistanceCm=400; % Default for runtime question.
% SOUND & FEEDBACK
o.beepNegativeFeedback=0;
o.beepPositiveFeedback=1;
o.showProgressBar=1;
o.speakEachLetter=1;
o.speakEncouragement=0;
o.speakViewingDistance=0;
o.usePurring=0;
o.useSpeech=1;
% VISUAL STIMULUS
o.durationSec=inf; % duration of display of target and flankers
o.eccentricityXYDeg=[0 0]; % Distance of target from fixation.
% o.fixedSpacingOverSize=0; % Disconnect size & spacing.
o.fixedSpacingOverSize=1.4; % Requests size proportional to spacing, horizontally and vertically.
o.fourFlankers=0;
o.targetSizeIsHeight=nan; % depends on parameter
o.minimumTargetPix=6; % Minimum viewing distance depends soley on this & pixPerCm.
% o.flankingDirection='tangential'; % vertically arranged flankers for single target
o.flankingDirection='radial'; % horizontally arranged flankers for single target
o.repeatedTargets=1; % Repeat targets for immunity to fixation errors.
o.maxFixationErrorXYDeg=[3 3]; % Repeat enough to cope with this.
o.practicePresentations=3;
o.setTargetHeightOverWidth=0; % Stretch font to achieve a particular aspect ratio.
o.spacingDeg=nan;
o.targetDeg=nan;
% TARGET FONT
% o.targetFont='Sloan';
% o.alphabet='DHKNORSVZ'; % Sloan alphabet, excluding C
% o.borderLetter='X';
% o.alphabet='HOTVX'; % alphabet of Cambridge Crowding Cards
% o.borderLetter='$';
o.targetFont='Pelli';
o.alphabet='123456789';
o.borderLetter='$';
% o.targetFont='ClearviewText';
% o.targetFont='Gotham Cond SSm XLight';
% o.targetFont='Gotham Cond SSm Light';
% o.targetFont='Gotham Cond SSm Medium';
% o.targetFont='Gotham Cond SSm Book';
% o.targetFont='Gotham Cond SSm Bold';
% o.targetFont='Gotham Cond SSm Black';
% o.targetFont='Arouet';
% o.targetFont='Pelli';
% o.targetFont='Retina Micro';
% FIXATION
o.isFixationBlankedNearTarget=1;
o.fixationMarkDeg=inf; % 0, 3, and inf are a typical values.
o.fixationThicknessDeg=0.02;
o.nearPointXYInUnitSquare=[0.5 0.5];
o.markTargetLocation=false; % 1 to mark target location
% QUEST threshold estimation
o.beta=nan;
o.measureBeta=0;
o.pThreshold=nan;
o.tGuess=nan;
o.tGuessSd=nan;
o.useQuest=1; % true(1) or false(0)
% DEBUGGING AIDS
o.frameTheTarget=0;
o.printScreenResolution=0;
o.printSizeAndSpacing=0;
o.showAlphabet=0;
o.showBounds=0;
o.showLineOfLetters=0;
o.speakSizeAndSpacing=0;
o.useFractionOfScreenToDebug=0;
% TO MEASURE BETA
% o.measureBeta=0;
% o.offsetToMeasureBeta=-0.4:0.1:0.2; % offset of t, i.e. log signal intensity
% o.trialsDesired=200;
% TO HELP CHILDREN
% o.fractionEasyTrials=0.2; % 0.2 adds 20% easy trials. 0 adds none.
% o.speakEncouragement=1; % 1 to say "good," "very good," or "nice" after every trial.
%% CUSTOM CODE
% RUN (measure two thresholds, interleaved)
o.useFractionOfScreenToDebug=0;
o.nearPointXYInUnitSquare=[0.5 0.5];
o.targetFont='Sloan';
o.alphabet='DHKNORSVZ'; % Sloan alphabet, excluding C
o.borderLetter='X';
o.repeatedTargets=0;
o.thresholdParameter='spacing';
o.flankingDirection='tangential';
o.durationSec=0.2;
o.fourFlankers=0;
o.trialsDesired=40; % Number of trials (i.e. responses) for the threshold estimate.
o.fixationMarkDeg=20; % 0, 3, and inf are a typical values.
% TEST ALL ECCENTRICITIES
% ori=90; % re straight up.
% o.nearPointXYInUnitSquare=0.5-0.4*[sind(ori) cosd(ori)];
% o.fixedSpacingOverSize=1.4; % Requests size proportional to spacing, horizontally and vertically.
% o.viewingDistanceCm=25; % Default for runtime question.
% for ecc=[3 10 30 60]
% o.viewingDistanceCm=2*round(0.5*25*30/ecc);
% o.viewingDistanceCm=min(60,o.viewingDistanceCm);
% Speak(sprintf('Viewing distance %d centimeters.',o.viewingDistanceCm));
% for one=0:1
% o.oneFlanker=one;
% o.eccentricityXYDeg=ecc*[sind(ori) cosd(ori)];;
% o=CriticalSpacing(o);
% if o.quitExperiment
% break;
% end
% end
% if o.quitExperiment
% break;
% end
% end
% TEST ALL MERIDIANS
o.eccentricityXYDeg=[60 0];
o.fixedSpacingOverSize=1.4; % Requests size proportional to spacing, horizontally and vertically.
for one=0:1
o.oneFlanker=one;
for ori=0:30:360 % re straight up.
o.nearPointXYInUnitSquare=0.5-0.4*[sind(ori) cosd(ori)];
o.eccentricityXYDeg=ecc*[sind(ori) cosd(ori)];
o=CriticalSpacing(o);
end
end
% Results are printed in MATLAB's Command Window and saved in the
% CriticalSpacing/data/ folder.