Flicker Paradigm

lovecanines — Mon, 13 Nov 2017 09:03:27 GMT

Hi all,
The script provides three change types.
Is there a way to provide a test with only one change type?
For example: let's say I only want to test pictures with item present or absent but not changes in colors or locations.

Thanks.
Gal

RE: Flicker Paradigm

Dave — Mon, 13 Nov 2017 09:03:27 GMT

[quote]

[b]lovecanines - Friday, November 10, 2017[/b]

[/quote]

> Is there a way to provide a test with only one change type?

Yes. The change types are sampled from <list> elements:

Note: selects randomly without replacement a trial sequence presenting stimuli with location (1), presence/absence (2) or color changes
=> each change type trial sequence is selected equally often
<list changetype_Mixed>
/items = (1, 2, 3)
/poolsize = parameters.max_numberoftrials
/replace = false
/resetinterval = 1
</list>

***********************************
Test Lists: BLOCKED design
***********************************

Note: selects randomly without replacement a trial sequence presenting stimuli with location (1), presence/absence (2) or color changes
=> each change type trial sequence is selected equally often
<list changetype_Blocked>
/items = (1, 2, 3)
/poolsize = parameters.max_numberoftrials/2
/replace = false
/resetinterval = 1
</list>

You can eliminate the change types you don't want from the <list>s' /items.

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Flicker Paradigm

RE: Flicker Paradigm