Different trials conditional on participants response

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Different trials conditional on participants response

Different trials conditional on participants response

Author	Message
Gaetan	Gaetan posted 4 Years Ago Topic Details Share Topic
Group: Forum Members Posts: 9, Visits: 20	Hi all, I'm trying to program an approach-avoidance task in which participants have to decide to approach a stimulus (by pressing the UP arrow) or avoid a stimulus (by pressing the DOWN arrow). Based on what they do, participants should see (1) A reward screen when they approach; (2) A no_reward screen when they avoid; (3) a time-out message when they fail to response in time (i.e., within 3 seconds). I've tried different things (braching, the /responsetrial attribute and the /ontrialend attibute), but I can't figure it out. Anyone have any suggestions/solutions? What I have now: <trial high_level0> / stimulustimes = [100 = cover; 500 = high_level0; 3500 = cover] / validresponse = (200, 208) / response = timeout(3500) / responseinterrupt = trial / branch = [if (trial.high_level0.response==200)trial.high_reward_US_level0] / branch = [if (trial.high_level0.response==208)trial.no_reward_noUS] / branch = [if (trial.high_level0.response==noresponse)trial.timeout_message] </trial> Thank you already for your help! Best, Gaetan
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Gaetan	Gaetan posted 4 Years Ago ANSWER Post Details Share Post
Group: Forum Members Posts: 9, Visits: 20	+x Gaetan - 11/9/2020 Hi all, I'm trying to program an approach-avoidance task in which participants have to decide to approach a stimulus (by pressing the UP arrow) or avoid a stimulus (by pressing the DOWN arrow). Based on what they do, participants should see (1) A reward screen when they approach; (2) A no_reward screen when they avoid; (3) a time-out message when they fail to response in time (i.e., within 3 seconds). I've tried different things (braching, the /responsetrial attribute and the /ontrialend attibute), but I can't figure it out. Anyone have any suggestions/solutions? What I have now: <trial high_level0> / stimulustimes = [100 = cover; 500 = high_level0; 3500 = cover] / validresponse = (200, 208) / response = timeout(3500) / responseinterrupt = trial / branch = [if (trial.high_level0.response==200)trial.high_reward_US_level0] / branch = [if (trial.high_level0.response==208)trial.no_reward_noUS] / branch = [if (trial.high_level0.response==noresponse)trial.timeout_message] </trial> Thank you already for your help! Best, Gaetan I had to add: I can make it work, sort of, but the trial first shows the stimulus figure ("high_level0") and only after the stimulus disappears from the screen, it records the responses and changes the trial. But I would like Inquisit to record the response while the stimulus is on the screen, and then follow this up with a next trial conditional on the response (or give a time out message).
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Gaetan	Gaetan posted 4 Years Ago ANSWER Post Details Share Post
Group: Forum Members Posts: 9, Visits: 20	Update: I think I figured it out. I needed to specify / beginresponsetime because otherwise, Inquisit took by default the final stimulus presentation to start recording responses I believe, which messed up stimulus timing. The code that worked for me now: <trial high_level0> / stimulustimes = [100 = cover; 500 = high_level0; 3500 = cover] / validresponse = (200, 208) / response = timeout(3500) / responseinterrupt = trial / beginresponsetime = 500 / responsetrial = (200, high_reward_US_level0) / responsetrial = (208, no_reward_noUS) / responsetrial = (noresponse, timeout_message) </trial>
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