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Trying to achieve block randomization for 6 conditions

bkorsmo — Thu, 25 Oct 2018 12:01:22 GMT

I'm trying to achieve block randomization for 6 conditions. I'm hosting on millisecond.com. Here is how I'm trying it below but it doesnt seem to be working.

<batch>
/ subjects = (1 of 6)
/ groupassignment = random
/file="informed_consent_control_1.iqx"
/file="intro_control.iqx"
/file="intervention_control.iqx"
/file="2_IAT_race.iqx"
/file="survey_control.iqx"
/file="final_page.iqx"
</batch>

<batch>
/ subjects = (2 of 6)
/ groupassignment = random
/file="informed_consent_BS.iqx"
/file="intro_BS_1.iqx"
/file="intervention_BS_1.iqx"
/file="2_IAT_race.iqx"
/file="survey_meditation.iqx"
/file="final_page.iqx"
</batch>

<batch>
/ subjects = (3 of 6)
/ groupassignment = random
/file="informed_consent_LKM.iqx"
/file="intro_LKM.iqx"
/file="intervention_LKM.iqx"
/file="2_IAT_race.iqx"
/file="survey_meditation.iqx"
/file="final_page.iqx"
</batch>

<batch>
/ subjects = (4 of 6)
/ groupassignment = random
/file="informed_consent_control_1.iqx"
/file="intro_control.iqx"
/file="intervention_control.iqx"
/file="2_IAT_race.iqx"
/file="survey_control.iqx"
/file="final_page.iqx"
</batch>

<batch>
/ subjects = (5 of 6)
/ groupassignment = random
/file="informed_consent_BS.iqx"
/file="intro_BS_1.iqx"
/file="intervention_BS_1.iqx"
/file="2_IAT_race.iqx"
/file="survey_meditation.iqx"
/file="final_page.iqx"
</batch>

<batch>
/ subjects = (6 of 6)
/ groupassignment = random
/file="informed_consent_LKM.iqx"
/file="intro_LKM.iqx"
/file="intervention_LKM.iqx"
/file="2_IAT_race.iqx"
/file="survey_meditation.iqx"
/file="final_page.iqx"
</batch>

RE: Trying to achieve block randomization for 6 conditions

bkorsmo — Thu, 25 Oct 2018 12:01:22 GMT

[quote]

[b]Dave - Thursday, October 25, 2018[/b]

[quote]

[b]bkorsmo - Thursday, October 25, 2018[/b]

[/quote]

If you want condition assignment based on randomly generated group ids between 1 and 6, you need to set your <batch> elements' /grouassignment attributes to groupnumber, not random.

<batch>
/ subjects = (1 of 6)
/ groupassignment = groupnumber
/file="informed_consent_control_1.iqx"
/file="intro_control.iqx"
/file="intervention_control.iqx"
/file="2_IAT_race.iqx"
/file="survey_control.iqx"
/file="final_page.iqx"
</batch>

...

<batch>
/ subjects = (6 of 6)
/ groupassignment = groupnumber
/file="informed_consent_LKM.iqx"
/file="intro_LKM.iqx"
/file="intervention_LKM.iqx"
/file="2_IAT_race.iqx"
/file="survey_meditation.iqx"
/file="final_page.iqx"
</batch>

[/quote]

Thanks Dave!

RE: Trying to achieve block randomization for 6 conditions

Dave — Thu, 25 Oct 2018 11:54:07 GMT

[quote]

[b]bkorsmo - Thursday, October 25, 2018[/b]

[/quote]