Recording Responses Following Removal of Stimulus

Sarah.Skromanis — Tue, 09 Feb 2021 02:30:43 GMT

Hello,
I've created a task whereby each trial is presented for 2500ms. As it currently is, if participants do not make a response in that time, the latency is recorded as being 2500ms. I'm hoping to record response latency even after the trial has ended (i.e., during the post-trial pause) - for example, if a participant recognises the stimuli once it has been erased and makes a response, I want to know what the latency of that response is.

I hope that makes sense. Any advice would be greatly appreciated. I have copied some of the script below if that's of any help.

<trial familiarity_negative>
/ stimulustimes = [0=fixation; 500=familiarity_negative; keyreminder_familiarity]
/ validresponse = ("F", "J")
/ correctresponse = ("F")
/ beginresponsetime = 0
/ timeout = 2500
/ posttrialpause = 2500
</trial>
Many thanks,
Sarah

RE: Recording Responses Following Removal of Stimulus

Dave — Tue, 09 Feb 2021 02:30:43 GMT

+x[quote]

[b]Sarah.Skromanis - 2/8/2021[/b]
Hello,
I've created a task whereby each trial is presented for 2500ms. As it currently is, if participants do not make a response in that time, the latency is recorded as being 2500ms. I'm hoping to record response latency even after the trial has ended (i.e., during the post-trial pause) - for example, if a participant recognises the stimuli once it has been erased and makes a response, I want to know what the latency of that response is.

I hope that makes sense. Any advice would be greatly appreciated. I have copied some of the script below if that's of any help.

<trial familiarity_negative>
/ stimulustimes = [0=fixation; 500=familiarity_negative; keyreminder_familiarity]
/ validresponse = ("F", "J")
/ correctresponse = ("F")
/ beginresponsetime = 0
/ timeout = 2500
/ posttrialpause = 2500
</trial>
Many thanks,
Sarah
[/quote]

Then you cannot use posttrialpause. The trial is over by then, so it does not register any responses. Instead you'll have to set the trial up along the following lines:

<trial familiarity_negative>
/ ontrialbegin = [trial.familiarity_negative.resetstimulusframes();]
/ stimulustimes = [0=fixation; 500=familiarity_negative; keyreminder_familiarity; 2500=clearscreen]
/ validresponse = ("F", "J")
/ correctresponse = ("F")
/ beginresponsetime = 0
/ timeout = 5000
</trial>

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Recording Responses Following Removal of Stimulus

RE: Recording Responses Following Removal of Stimulus