audodd is a task rewritten for Pitt MRRC using psychtoolbox.
It is adapted from the task developed by xxx described in Auditory Oddball fMRI in Schizophrenia: Association of Negative Symptoms with Regional Hypoactivation to Novel Distractors.
In matlab or octave with psychtoolbox installed:
%% RUN
audodd 001
%% EXPLORE
mat001 = load('mats/001_20170522131351.mat' );
rt = [mat001.task.timing.rt];
crct = [mat001.task.timing.correct];
% mean: all, correct, incorrect
[ mean(rt(rt>0)), mean(rt(crct)), mean(rt(~crct & rt>0 )) ]- limit impossibly quick responses w/
waitForKey.m:fastestResponseTime. set to 60ms.
all functions have minimal help. In Matlab/ocatve, see e.g. help audodd.
-
audodd.m-- edit to change response keys and screen size | entrence to task, general wrapper -
testSetup.m-- run to test functions on a new computer, edit if new problems need to be tested -
PTBsetup.m-- edit to change bg color | general psychtoolbox setup, launch screen -
instructions.m-- edit to change instructions | dispalys instructions on a screen -
loadSounds.m-- edit to change sounds and order | load (cache) sounds and set play order -
fixation.m-- edit to change size/color of fixation cross | show fixation cross -
runTrial.m-- edit to change what trial info recorded | run a trial -
waitForKey.m-- edit to change fastest allowable response time | return response and keypress time -
stimuli/*wav-- actual sound stimuli. TODO: fix freq of std and target -
playsnd.m-- helper, no need to edit
w = PTBsetup([0 0 800 600]); % create a small screen
[snds, sndlist] = loadSounds(); % load up all sounds we will use
% look at fixation cross (need w)
fixation(w,[])
% play a sound (needs snd)
playsnd(snds.std,0)
% test insturctions (need w and snd)
instructions(w,snds,[]);
% test instructions with subject snd test
instructions(w,snds,KbNames({'a','b'}));
% test keybaord input (needs no extra variables)
[r k] = waitForKey(KbName('a'),Inf)
[r k] = waitForKey(KbName({'a','b'}), GetSecs()+2 )
% run a full trial (need snds)
runTrial('std',snds.std ,KbName({'a','b'}),GetSecs(),GetSecs()+2)