Millisecond Forums » Millisecond Forums » Inquisit 5 » Posttrial Pause

Posttrial Pause

sarahlynmart@gmail.com — Mon, 28 Nov 2016 18:10:13 GMT

Hello,

I am creating an experiment with an intertrial interval of a random interval and would like my stimuli to be sandwiched between a fixation cross. That is, I would like the fixation cross to be presented during the intertrial interval though the ITI is a blank white screen. Is there a way I can present the fixation cross during the postrial pause? I have copied/pasted my code in for your reference. Thank you for your help.

<trial WAfaceitems>
/ ontrialbegin = [values.category = "WAfaceitems"]
/ ontrialbegin = [values.itemnumber = list.wafaceitems.nextvalue]
/stimulustimes = [0 = Wafaceitems, wafaceitemtrigger; 50= triggeroff; 700 = shape.eraser; 701 = fixationcross]
/ timeout = 1201

/ posttrialpause = rand(values.iti_min, values.iti_max)
/validresponse = (0)
</trial>

RE: Posttrial Pause

Dave — Mon, 28 Nov 2016 18:10:13 GMT

[quote]

[b]sarahlynmart@gmail.com - Monday, November 28, 2016[/b]

[quote]

[b]Dave - Monday, November 28, 2016[/b]

[quote]

[b]sarahlynmart@gmail.com - Sunday, November 27, 2016[/b]

[/quote]

If you want the fixation cross on-screen during the posttrialpause, you need to set the "fixationcross" stimulus's /erase attribute to 'false'.

<text fixationcross>
/ items = ("+")
/ erase = false
</text>

[/quote]

Thank you for your response. I have added in the erase element though the fixation cross is still not presented during the post-trial pause. Instead, the post-trial pause is still a blank screen.
<text fixationcross>
/ items = ("+")
/ position = (50%, 50%)
/ fontstyle = ("Arial", 9.38%, false, false, false, false, 5, 1)
/ erase = false
</text>

Is there a way to add a background image that gets erased when the stimuli are presented?

[/quote]

> the post-trial pause is still a blank screen.

This means that there are other stimuli presented during the trial that (1) inhabit the same position as the fixationcross stimulus, and (2) are not set to /erase = false. Meaning: In the process of erasing those stimuli, the fixation cross gets erased as well. Note that "erasing" a stimulus simply means overwriting it with the default screen color (or an explicitly specified color in the respective stimulus element's /erase attribute). Double-check the /erase settings for all (visual) stimulus elements presented by the <trial>. Make sure they are all set to false. Crucially, do not forget to set <shape eraser>'s /erase attribute to false as well.

RE: Posttrial Pause

sarahlynmart@gmail.com — Mon, 28 Nov 2016 17:46:14 GMT

[quote]

[b]Dave - Monday, November 28, 2016[/b]

[quote]

[b]sarahlynmart@gmail.com - Sunday, November 27, 2016[/b]

[/quote]

RE: Posttrial Pause

Dave — Mon, 28 Nov 2016 07:20:15 GMT

[quote]

[b]sarahlynmart@gmail.com - Sunday, November 27, 2016[/b]

[/quote]