stimuli disappearing on response

NickLevy1990 — Fri, 23 Jun 2017 08:49:01 GMT

Hi!
Long time listener first time caller. I'm hoping you can help me. I'm running 5.0.7
I'm writing a script to record responses to a face stimulus.
Participants see the face for 500ms, then a fixation cross for 1500ms. I want the stimuli displayed for the whole time.
For some reason the picture disappears when you respond, and if you respond once the fixation cross is up, the fixation cross disappears.
I've followed the advice posted here but to no avail https://www.millisecond.com/forums/Topic9656.aspx?Keywords=stimulus

here are the relevant elements. I've attached the entire script as well.

<trial surprise_trial_F_pos_o1>
/ ontrialbegin = [
values.currentpic_number = values.currentpic_number +1
]
/stimulustimes = [1=faces_picture_o1, reminder_F_pos; 500 = occluder,text.FixBlack_text_no_erase]
/responseinterrupt = trial
/validresponse =("f", "j")
/ correctresponse = ("f")
/trialduration = 2000
/ beginresponsetime = -1
/ontrialend = [
if (trial.surprise_trial_F_pos_o1.correct)
values.surprise_pos_rating = values.surprise_pos_rating +1;
else {
values.surprise_neg_rating = values.surprise_neg_rating +1;
values.block_surprise_neg_rating = values.block_surprise_neg_rating +1}
]
</trial>

<picture faces_picture_o1>
/items = faces_items_o1
/select = values.currentpic_number
/width = 75%
/height = 75%
/erase = false
</picture>

<text FixBlack_text_no_erase>
/ items = Fixation_item
/ fontstyle = ("arial", -150, false, false, false, false)
/erase = false
</text>

Would really appreciate any help,
Cheers,
Nick

RE: stimuli disappearing on response

Dave — Fri, 23 Jun 2017 08:49:01 GMT

[quote]

[b]NickLevy1990 - Thursday, June 22, 2017[/b]

[/quote]

> For some reason the picture disappears when you respond, and if you respond once the fixation cross is up, the fixation cross disappears.

<picture occluder>
/items = occluder
/select = 1
/width = 100%
/height = 100%
</picture>

needs to be set to /erase=false as well

<picture occluder>
/items = occluder
/select = 1
/width = 100%
/height = 100%
/ erase = false
</picture>

and while I'm unable to reproduce "For some reason the picture disappears when you respond", try setting the <trial>'s /responseinterrupt to frames instead of trial.

<trial surprise_trial_F_pos_o1>
/ ontrialbegin = [
values.currentpic_number = values.currentpic_number +1
]
/stimulustimes = [1=faces_picture_o1, reminder_F_pos; 500 = occluder,text.FixBlack_text_no_erase]
/responseinterrupt = frames
...
</trial>

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stimuli disappearing on response

RE: stimuli disappearing on response