Millisecond Forums » Millisecond Forums » Inquisit 4 » HOW TO CHANGE STIMULUS TIME?

HOW TO CHANGE STIMULUS TIME?

Fabiana — Tue, 09 Apr 2019 00:09:35 GMT

I have to present my stimuli for a fixed period of time (4 seconds),
I tried by adding /ontrialbegin= [trial.mytrial.stimulustime(4000)] inside my trial, but every time I try to run it, it gives an error message.
What should I do?

RE: HOW TO CHANGE STIMULUS TIME?

Fabiana — Tue, 09 Apr 2019 00:09:35 GMT

[quote]

[b]Fabiana - Monday, April 8, 2019[/b]

[quote]

[b]Fabiana - Monday, April 8, 2019[/b]

[quote]

[b]Dave - Monday, April 8, 2019[/b]

[quote]

[b]Fabiana - Monday, April 8, 2019[/b]

[quote]

[b]Dave - Monday, April 8, 2019[/b]

[quote]

[b]Fabiana - Sunday, April 7, 2019[/b]

[/quote]

If your trial doesn't require a response, simply set its /trialduration to 4000.

<trial example>
/ stimulustimes = [0=yourstimulus]
/ validresponse = (0)
/ trialduration = 4000
</trial>

If your trial requires some kind of response after the stimuli have been removed, do

<trial example>
/ stimulustimes = [0=yourstimulus; 4000=erasescreen]
/ validresponse = (57)
</trial>

with

<shape erasescreen>
/ shape = rectangle
/ size = (100%, 100%)
/ erase = false
/ color = white
</shape>

See https://www.millisecond.com/support/docs/v4/html/howto/howtoerase.htm

[/quote]

Thank you so much!

I need a response so I tried with the second one but it gives error messages saying "Stimulus sequence already defined".

[/quote]

Then you're doing something wrong. What that is, I cannot tell you without you providing your actual code. Note: Your <trial> elements may only have either a single /stimulustimes attribute or a single /stimulusframes attribute. You may not have both in a given <trial> element, and you may not have multiple /stimulustimes or /stimulusframes attributes in a given <trial> element either.

[/quote]

Yeah, I noticed I already had a /stimulusframes attribute so I substitute it with /stimulustimes.

Thank you so much

[/quote]

The problem now is that to continue with the presentation of my stimuli I have to press the response key, while I want the stimuli to be presented one after the other and to press the key only to give the response.

[/quote]

I solved my problem by adding /beginresponsetime = 0 /responseinterrupt = frames /posttrialpause = 1500 inside my trial.

Thank you so much for your help!

RE: HOW TO CHANGE STIMULUS TIME?

Fabiana — Mon, 08 Apr 2019 19:48:12 GMT

[quote]

[b]Fabiana - Monday, April 8, 2019[/b]

[quote]

[b]Dave - Monday, April 8, 2019[/b]

[quote]

[b]Fabiana - Monday, April 8, 2019[/b]

[quote]

[b]Dave - Monday, April 8, 2019[/b]

[quote]

[b]Fabiana - Sunday, April 7, 2019[/b]

[/quote]

Thank you so much!

I need a response so I tried with the second one but it gives error messages saying "Stimulus sequence already defined".

[/quote]

Yeah, I noticed I already had a /stimulusframes attribute so I substitute it with /stimulustimes.

Thank you so much

[/quote]

RE: HOW TO CHANGE STIMULUS TIME?

Fabiana — Mon, 08 Apr 2019 19:44:01 GMT

[quote]

[b]Dave - Monday, April 8, 2019[/b]

[quote]

[b]Fabiana - Monday, April 8, 2019[/b]

[quote]

[b]Dave - Monday, April 8, 2019[/b]

[quote]

[b]Fabiana - Sunday, April 7, 2019[/b]

[/quote]

Thank you so much!

I need a response so I tried with the second one but it gives error messages saying "Stimulus sequence already defined".

[/quote]

Yeah, I noticed I already had a /stimulusframes attribute so I substitute it with /stimulustimes.

Thank you so much

RE: HOW TO CHANGE STIMULUS TIME?

Dave — Mon, 08 Apr 2019 19:37:17 GMT

[quote]

[b]Fabiana - Monday, April 8, 2019[/b]

[quote]

[b]Dave - Monday, April 8, 2019[/b]

[quote]

[b]Fabiana - Sunday, April 7, 2019[/b]

[/quote]

Thank you so much!

I need a response so I tried with the second one but it gives error messages saying "Stimulus sequence already defined".

[/quote]

RE: HOW TO CHANGE STIMULUS TIME?

Fabiana — Mon, 08 Apr 2019 18:38:28 GMT

[quote]

[b]Dave - Monday, April 8, 2019[/b]

[quote]

[b]Fabiana - Sunday, April 7, 2019[/b]

[/quote]

Thank you so much!

I need a response so I tried with the second one but it gives error messages saying "Stimulus sequence already defined".

RE: HOW TO CHANGE STIMULUS TIME?

Dave — Mon, 08 Apr 2019 05:46:16 GMT

[quote]

[b]Fabiana - Sunday, April 7, 2019[/b]

[/quote]