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function trials = buildTrainTrials(disp_struct, task_struct)
% define each fc stimulus pair trial
stimPairs = [1,2; 3,4;];
% will hold all the trials
fcTrials = [];
% loop through each pair
for pI = 1 : size(stimPairs, 1)
% will hold the stimulus trials
pairTrials = nan(task_struct.numTrainReps, task_struct.cRT);
pairTrials(:, task_struct.cTrialCond) = task_struct.FC;
startID = 1 + 10*(pI - 1);
pairTrials(:, task_struct.cTrialID) = startID:(startID+task_struct.numTrainReps-1);
% specs for card 1
pairTrials(:,task_struct.cS1) = stimPairs(pI, 1);
stim1Win = rand(task_struct.numTrainReps, 1) <= task_struct.pWin(stimPairs(pI, 1));
pairTrials(stim1Win,task_struct.cS1Rew) = task_struct.WIN;
pairTrials(~stim1Win,task_struct.cS1Rew) = task_struct.LOSS;
% specs for card 2
pairTrials(:,task_struct.cS2) = stimPairs(pI, 2);
stim2Win = rand(task_struct.numTrainReps, 1) <= task_struct.pWin(stimPairs(pI, 2));
pairTrials(stim2Win,task_struct.cS2Rew) = task_struct.WIN;
pairTrials(~stim2Win,task_struct.cS2Rew) = task_struct.LOSS;
% compile paired trials
fcTrials = [fcTrials; pairTrials];
end % for each stim pair
% get all AB, CD pairs
ABfc = fcTrials(fcTrials(:, task_struct.cS1) == task_struct.sCodes.Afc,:);
CDfc = fcTrials(fcTrials(:, task_struct.cS1) == task_struct.sCodes.Cfc,:);
% build matching nc trials
ABnc = ABfc;
ABnc(:, task_struct.cTrialCond) = task_struct.NC;
ABnc(:, task_struct.cS1) = ABnc(:, task_struct.cS1) + task_struct.ncAdjust;
ABnc(:, task_struct.cS2) = ABnc(:, task_struct.cS2) + task_struct.ncAdjust;
% for CD
CDnc = CDfc;
CDnc(:, task_struct.cTrialCond) = task_struct.NC;
CDnc(:, task_struct.cS1) = CDnc(:, task_struct.cS1) + task_struct.ncAdjust;
CDnc(:, task_struct.cS2) = CDnc(:, task_struct.cS2) + task_struct.ncAdjust;
% knit the fc and nc trials together
AB = nan(2*size(ABfc,1), size(ABfc,2));
AB(1:2:end) = ABfc;
AB(2:2:end) = ABnc;
% CD trials
CD = nan(2*size(CDfc,1), size(CDfc,2));
CD(1:2:end) = CDfc;
CD(2:2:end) = CDnc;
% now knit all AB, CD,trials toghether
% maintaining the order within each AB, CD and EF set
trials = nan(2*size(AB,1), size(AB,2));
slots = reshape(randperm(size(trials,1)), size(AB,1), 2);
% assign AB slots
trials(sort(slots(:,1)),:) = AB;
trials(sort(slots(:,2)),:) = CD;
trials(:, task_struct.cTrialNum) = 1:size(trials,1);
% stim ordering for each trial
trials(:,task_struct.cIsS1Left) = rand(size(trials,1), 1) >= 0.5;
trials(:,task_struct.cTrialType) = task_struct.TRAIN;
end % function |