Length of Key Depression

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Length of Key Depression

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CES	CES posted 11 Years Ago Topic Details Share Topic
Group: Forum Members Posts: 24, Visits: 103	Is Inquisit able to measure the length of time that a participant depresses a key?
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CES	CES posted 11 Years Ago ANSWER Post Details Share Post
Group: Forum Members Posts: 24, Visits: 103	To clarify, this would be how long they have held a key down for.
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Dave	Dave posted 11 Years Ago ANSWER Post Details Share Post
Group: Administrators Posts: 13K, Visits: 108K	Yes and no. Inquisit 4 (not Inquisit 3) is able to register key presses as well as key releases. So what you would have to do is - register the key press in a <trial> - store the time when the key was pressed - register key release in a <trial> - store the time when key was released - derive press duration as 'time of release' minus 'time of press' <values> / timeofpress = 0 / timeofrelease = 0 </values> <expressions> / pressduration = values.timeofrelease-values.timeofpress </expressions> <block myblock> / trials = [1-4=sequence(press,release,duration)] </block> <trial press> / stimulusframes = [1=presstxt] / ontrialend = [values.timeofpress=script.elapsedtime] / validresponse = (57) </trial> <trial release> / stimulusframes = [1=releasetxt] / ontrialend = [values.timeofrelease=script.elapsedtime] / validresponse = (-57) </trial> <trial duration> / stimulusframes = [1=durationtxt] / validresponse = (noresponse) / trialduration = 1000 </trial> <text presstxt> / items = ("Press SPACEBAR") </text> <text releasetxt> / items = ("Release SPACEBAR") </text> <text durationtxt> / items = ("Duration: <%expressions.pressduration%>") </text> Edited 11 Years Ago by Dave
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