Millisecond Forums » Millisecond Forums » Inquisit 5 » Identifying Group ID

Identifying Group ID

juliasmith — Tue, 14 May 2019 07:46:42 GMT

Hi there,

I conducted an experiment last year where participants did the OSPAN and n-back tasks before doing a Qualtrics questionnaire. They were randomly assigned to do one or the other first using the following script:
<batch>
/ subjects = (1 of 2)
/ groupassignment = random
/ file = "shortfrenchversionnback.iqx"
/ file = "shortfrenchversionospan.iqx"
</batch>

//order 2: B -> A -> Qualtrics
<batch>
/ subjects = (2 of 2)
/ groupassignment = random
/ file = "shortfrenchversionospan.iqx"
/ file = "shortfrenchversionnback.iqx"
</batch>

We are analyzing the data and are a bit puzzled by identifying the group ID. Is it correct that group ID 1 = did the n-back first and group ID 2 = did OSPAN first? Some of the participant start times seem to not line up with this and so I am not sure if I have correctly understood.

Thanks for your help!

RE: Identifying Group ID

Dave — Tue, 14 May 2019 07:46:42 GMT

[quote]

[b]juliasmith - Tuesday, May 14, 2019[/b]

Hi Dave,

I see, thank you for explaining. Is there a way to apply the formula listed in this topic to the data?
https://www.millisecond.com/forums/Topic13856.aspx

[/quote]

No. As I said, the random code the batch generated to assign to one of your two <batch> conditions was not logged anywhere, so there's nothing to apply that formula to.

RE: Identifying Group ID

juliasmith — Tue, 14 May 2019 07:40:25 GMT

[quote]

[b]Dave - Tuesday, May 14, 2019[/b]

[quote]

[b]juliasmith - Tuesday, May 14, 2019[/b]

[quote]

[b]Dave - Tuesday, May 14, 2019[/b]

[quote]

[b]juliasmith - Tuesday, May 14, 2019[/b]

[/quote]

> Is it correct that group ID 1 = did the n-back first and group ID 2 = did OSPAN first?

No, you assigned the order of the tasks randomly per

<batch>
/ subjects = (1 of 2)
/ groupassignment = random
/ file = "shortfrenchversionnback.iqx"
/ file = "shortfrenchversionospan.iqx"
</batch>

//order 2: B -> A -> Qualtrics
<batch>
/ subjects = (2 of 2)
/ groupassignment = random
/ file = "shortfrenchversionospan.iqx"
/ file = "shortfrenchversionnback.iqx"
</batch>

The order was not based on the group ID. If it had been, you would have had to specify

<batch>
/ subjects = (1 of 2)
/ groupassignment = groupnumber
/ file = "shortfrenchversionnback.iqx"
/ file = "shortfrenchversionospan.iqx"
</batch>

//order 2: B -> A -> Qualtrics
<batch>
/ subjects = (2 of 2)
/ groupassignment = groupnumber
/ file = "shortfrenchversionospan.iqx"
/ file = "shortfrenchversionnback.iqx"
</batch>

[/quote]

Dear Dave,

Thank you for your reply. What does the groupID represent? Is there a way to identify the order, other than looking at the start times of each individual participant?
Best,
Julia

[/quote]

The group id, in your case, probably does not represent anything, since neither the <batch> nor any of the two tasks involved made use of the group id to assign any between-subjects conditions. Since the random assignment you used in your <batch> elements isn't logged anywhere, you need to go through the start times to determine the order a given participant received.

[/quote]

Hi Dave,

I see, thank you for explaining. Is there a way to apply the formula listed in this topic to the data?
https://www.millisecond.com/forums/Topic13856.aspx

RE: Identifying Group ID

Dave — Tue, 14 May 2019 07:33:07 GMT

[quote]

[b]juliasmith - Tuesday, May 14, 2019[/b]

[quote]

[b]Dave - Tuesday, May 14, 2019[/b]

[quote]

[b]juliasmith - Tuesday, May 14, 2019[/b]

[/quote]

Dear Dave,

Thank you for your reply. What does the groupID represent? Is there a way to identify the order, other than looking at the start times of each individual participant?
Best,
Julia

[/quote]

RE: Identifying Group ID

juliasmith — Tue, 14 May 2019 06:32:23 GMT

[quote]

[b]Dave - Tuesday, May 14, 2019[/b]

[quote]

[b]juliasmith - Tuesday, May 14, 2019[/b]

[/quote]

Dear Dave,

Thank you for your reply. What does the groupID represent? Is there a way to identify the order, other than looking at the start times of each individual participant?
Best,
Julia

RE: Identifying Group ID

Dave — Tue, 14 May 2019 06:28:51 GMT

[quote]

[b]juliasmith - Tuesday, May 14, 2019[/b]

[/quote]