Millisecond Forums » Millisecond Forums » Inquisit 6 » Group ID

Group ID

lir1995 — Fri, 10 Sep 2021 21:31:24 GMT

Hi,

In my study, I want to have a certain script run based on the subjects group ID (as I need to document their unique subject ID): here is the code:

<include>
/ precondition = [script.groupid == 1]
/ file = "goal_rel_yoked_158698.iqx"
</include>

<include>
/ precondition = [script.groupid == 2]
/ file = "goal_rel_yoked_160654.iqx"
</include>

<include>
/ precondition = [script.groupid == 3]
/ file = "goal_rel_yoked_159193.iqx"
</include>

<include>
/ precondition = [script.groupid == 4]
/ file = "goal_rel_yoked_160585.iqx"
</include>

<include>
/ precondition = [script.groupid == 5]
/ file = "goal_rel_yoked_160633.iqx"
</include>

I am using inquisit web. What I did was in Participant IDs, I set the "how should the group Ids be determined" to "random no replace" with 5 groups. However, I just ran 4 subjects and I got two participants with group ID 3, and two with group ID 4, which I was surprised since I set it to no replace.

I don't have anywhere in the scripts that calls a group number, I'm not sure if that is necessary.

Is there something I am doing wrong? How can I fix it so that I get one participant with each group ID 1-5? I don't care if it is sequential or random.

Thank you very much!

RE: Group ID

lir1995 — Fri, 10 Sep 2021 21:31:24 GMT

+x[quote]

[b]Dave - 9/10/2021[/b]
+x[quote]

[b]lir1995 - 9/10/2021[/b]
Hi,

In my study, I want to have a certain script run based on the subjects group ID (as I need to document their unique subject ID): here is the code:

<include>
/ precondition = [script.groupid == 1]
/ file = "goal_rel_yoked_158698.iqx"
</include>

<include>
/ precondition = [script.groupid == 2]
/ file = "goal_rel_yoked_160654.iqx"
</include>

<include>
/ precondition = [script.groupid == 3]
/ file = "goal_rel_yoked_159193.iqx"
</include>

<include>
/ precondition = [script.groupid == 4]
/ file = "goal_rel_yoked_160585.iqx"
</include>

<include>
/ precondition = [script.groupid == 5]
/ file = "goal_rel_yoked_160633.iqx"
</include>

I am using inquisit web. What I did was in Participant IDs, I set the "how should the group Ids be determined" to "random no replace" with 5 groups. However, I just ran 4 subjects and I got two participants with group ID 3, and two with group ID 4, which I was surprised since I set it to no replace.

I don't have anywhere in the scripts that calls a group number, I'm not sure if that is necessary.

Is there something I am doing wrong? How can I fix it so that I get one participant with each group ID 1-5? I don't care if it is sequential or random.

Thank you very much!
[/quote]

> What I did was in Participant IDs, I set the "how should the group Ids be determined" to "random no replace" with 5 groups.

That sounds correct.

> I just ran 4 subjects and I got two participants with group ID 3, and two with group ID 4, which I was surprised since I set it to no replace.

A group iD is generated whenever someone visits or refreshes the start page, regardless of whether that person then ends up actually launching the experiment. That is why you are seeing gaps.
[/quote]

Makes sense, thanks!

RE: Group ID

Dave — Fri, 10 Sep 2021 20:48:32 GMT

+x[quote]

[b]lir1995 - 9/10/2021[/b]
Hi,

In my study, I want to have a certain script run based on the subjects group ID (as I need to document their unique subject ID): here is the code:

<include>
/ precondition = [script.groupid == 1]
/ file = "goal_rel_yoked_158698.iqx"
</include>

<include>
/ precondition = [script.groupid == 2]
/ file = "goal_rel_yoked_160654.iqx"
</include>

<include>
/ precondition = [script.groupid == 3]
/ file = "goal_rel_yoked_159193.iqx"
</include>

<include>
/ precondition = [script.groupid == 4]
/ file = "goal_rel_yoked_160585.iqx"
</include>

<include>
/ precondition = [script.groupid == 5]
/ file = "goal_rel_yoked_160633.iqx"
</include>

I am using inquisit web. What I did was in Participant IDs, I set the "how should the group Ids be determined" to "random no replace" with 5 groups. However, I just ran 4 subjects and I got two participants with group ID 3, and two with group ID 4, which I was surprised since I set it to no replace.

I don't have anywhere in the scripts that calls a group number, I'm not sure if that is necessary.

Is there something I am doing wrong? How can I fix it so that I get one participant with each group ID 1-5? I don't care if it is sequential or random.

Thank you very much!
[/quote]

> What I did was in Participant IDs, I set the "how should the group Ids be determined" to "random no replace" with 5 groups.

That sounds correct.

> I just ran 4 subjects and I got two participants with group ID 3, and two with group ID 4, which I was surprised since I set it to no replace.

A group iD is generated whenever someone visits or refreshes the start page, regardless of whether that person then ends up actually launching the experiment. That is why you are seeing gaps.