Millisecond Forums

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raven - 11/5/2023

Hi Dave,
How would I go about randomly allocating participants into one of three groups to run a particular script for each group using a batch file?
I've read that batch files can be used to run scripts in sequence and different scripts for odd or even subject IDs, however, as per the question, how do you randomize participants to one of three or more different scripts?
Thanks!

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Dave - 11/6/2023

+x

 

raven - 11/5/2023

Hi Dave,
How would I go about randomly allocating participants into one of three groups to run a particular script for each group using a batch file?
I've read that batch files can be used to run scripts in sequence and different scripts for odd or even subject IDs, however, as per the question, how do you randomize participants to one of three or more different scripts?
Thanks!

If you plan to run things on the web, assign to one of three batch elements by group ID and select random group ID generation in the web experiment's settings.

<batch>
/ groups = (1 of 3)
/ file = "a.iqx"
</batch>

<batch>
/ groups = (2 of 3)
/ file = "b.iqx"
</batch>

<batch>
/ groups = (3 of 3)
/ file = "c.iqx"
</batch>

Alternatively, if you run things in Inquisit Lab, use the /groupassignment = random mode.

<batch>
/ subjects = (1 of 3)
/ groupassignment = random
/ file = "a.iqx"
</batch>

<batch>
/ subjects = (2 of 3)
/ groupassignment = random
/ file = "b.iqx"
</batch>

<batch>
/ subjects = (3 of 3)
/ groupassignment = random
/ file = "c.iqx"
</batch>