Randomization

[Benedek Kurdi]

Hi all,

I think I have asked a very similar question before, so I apologize. I can't find the previous answer.

In one of my studies I am using an evaluative conditioning manipulation and the idea is that the USs should be sampled without replacement until the entire set has been exhausted. I thought that the exRandom sampling should be able to achieve this (rows 135 and 144). However, what I see in the data is that stimuli get repeated before the entire set has been used (e.g, n4.jpg appears both on the first and third trials). What am I doing wrong?

Thanks so much!

—Benedek

[Andrew Dzik]

Hey Benedek,

You have the exrandom at the wrong place.  You need to use it when you are inheriting the media.  That is the point where it needs to be randomized.  For example, the race IAT uses

media : {inherit:{type:'exRandom',set:'att1'}}

Andy Dzikiewicz

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[Benedek Kurdi]

Thanks, that worked!

—Benedek