Millisecond Forums

Hello. I have a remaining outstanding issue that I need to resolve before data collection, and I have been searching for the solution and would just like to double clarify if I am correct before I go ahead with it.

There are two conditions (Positive IBT training or Negative IBT training). In each of these conditions, there is a pre- and post- cognitive bias assessment that assesses cognitive bias before and after the IBT training type - RTA or RTB (Recognition Task). RTA and RTB are both the same test, only differing in material set used (e.g. set A or B). The order with which RTA and RTB are presented pre- and post- training are counterbalanced as can be seen below:

<batch>
/ subjects = (1 of 2)
/ groupassignment = groupnumber
/ file = "RTA.iqx"
/ file = "Positive IBT.iqx"
/ file = "RTB.iqx
</batch>

<batch>
/ subjects = (2 of 2)
/ groupassignment = groupnumber
/ file = "RTB.iqx"
/ file = "Positive IBT.iqx"
/ file = "RTA.iqx
</batch>

HOWEVER,  a random 50% of each training condition need to get RTA followed by RTB, and the other 50% the other way around. Hence material order is orthogonal to condition. In my data output, I would need information about which material set (e.g. RTA or RTB) were encountered first for each participant. I will eventually create in excel columns denoting something like  'material order' (0 = RTA first, 1 = RTB first), 'first RT score' (regardless of material type) 'second RT score' (regardless of material type). I can do these last parts independently, but the way I was going to approach this design set-up was to simply do the following:


// order RTA -> Positive IBT -> RTB
<batch>
/ subjects = (1 of 4)
/ groupassignment = groupnumber
/ file = "RTA.iqx"
/ file = "Positive IBT.iqx"
/ file = "RTB.iqx
</batch>

// order RTA -> Control IBT -> RTB
<batch>
/ subjects = (2 of 4)
/ groupassignment = groupnumber
/ file = "RTA.iqx"
/ file = "Positive IBT.iqx"
/ file = "RTB.iqx
</batch>

// order RTB -> Positive IBT -> RTA
<batch>
/ subjects = (3 of 4)
/ groupassignment = groupnumber
/ file = "RTB.iqx"
/ file = "Positive IBT.iqx"
/ file = "RTA.iqx
</batch>

// order RTB -> Control IBT -> RTA
<batch>
/ subjects = (4 of 4)
/ groupassignment = groupnumber
/ file = "RTB.iqx"
/ file = "Positive IBT.iqx"
/ file = "RTA.iqx
</batch>


As mentioned though, a random 50% of each training condition must get RTA followed by RTB, and the other 50% the other way around. I just need to check if this strategy is correct.

Yours Sincerely
Anthony