ontrialend not reading response correctly?

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ontrialend not reading response correctly?

ontrialend not reading response correctly?

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mzhang13	mzhang13 posted 8 Years Ago Topic Details Share Topic
Group: Forum Members Posts: 3, Visits: 34	Currently, I'm running a task where the participant makes a choice, and a master budget updates by subtracting the price of the selection. However, I noticed that even when pressing "z" only to move on, the conditional in the ontrailend part always goes to the "else" (and updates accordingly). Am I missing something here? <trial recipe_trial> / validresponse = ("z", "m") / stimulusframes = [1 = recipe1, recipe2, recipe1_price, recipe2_price, progress] / ontrialend = [ if (trial.recipe_trial.response == "z") { values.current_budget = values.current_budget - list.recipe1_prices.item(picture.recipe1.currentindex) } else { values.current_budget = values.current_budget - list.recipe2_prices.item(picture.recipe1.currentindex) } ] / posttrialpause = 250 </trial>
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Dave	Dave posted 8 Years Ago ANSWER Post Details Share Post
Group: Administrators Posts: 13K, Visits: 105K	+x mzhang13 - Wednesday, February 22, 2017 Currently, I'm running a task where the participant makes a choice, and a master budget updates by subtracting the price of the selection. However, I noticed that even when pressing "z" only to move on, the conditional in the ontrailend part always goes to the "else" (and updates accordingly). Am I missing something here? <trial recipe_trial> / validresponse = ("z", "m") / stimulusframes = [1 = recipe1, recipe2, recipe1_price, recipe2_price, progress] / ontrialend = [ if (trial.recipe_trial.response == "z") { values.current_budget = values.current_budget - list.recipe1_prices.item(picture.recipe1.currentindex) } else { values.current_budget = values.current_budget - list.recipe2_prices.item(picture.recipe1.currentindex) } ] / posttrialpause = 250 </trial> A <trial>'s response property returns the numerical scan code of the key pressed, not the key's "literal" value (letter or other symbol). The scan code of the "z"-key on a standard English-language keyboard is 44, i.e. your statement ought to read / ontrialend = [ if (trial.recipe_trial.response == 44) { ,,, } ] See the "Keyboard Scan Codes" topic in the documentation and 'Tools -> Keyboard Scancodes...' for details. To convert the scan code to the corresponding charcter, you can also use the computer.scancodetochar() function. Like so: <trial recipe_trial> / validresponse = ("z", "m") / branch = [ if (computer.scancodetochar(trial.recipe_trial.response) == "z") { trial.z } else { trial.m } ] / posttrialpause = 250 </trial> <trial z> / stimulusframes = [1=mytext] / validresponse = (57) </trial> <trial m> / stimulusframes = [1=mytext] / validresponse = (57) </trial> <text mytext> / items = ("you pressed <%script.currenttrial%>") </text> <block myblock> / trials = [1-4 = recipe_trial] </block> Edited 8 Years Ago by Dave
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