PLEASE HELP- How to Counterbalance Order Instead of Multiple Experiment Files??

[Julia Dipassio]

Hello everyone,

I am in urgent need of help with an E-Prime project (IAT) I am working on. I will be as detailed as I possibly can; I'm relatively new to the program.

For context:

I am conducting a standard 7 Block Implicit Association Test (Greenwald et al., 2003) using both pictures and words. I have 40 stimuli total. 20 are words (10 positive words, 10 negative words) and the other 20 are picture stimuli (10 being Symmetrical and the other 10 being Asymmetrical). Therefore, my "Target" labels are Symmetry and Asymmetry, and my "Attribute" labels are Positive and Negative. 

The layout of the blocks is as follows:

                                          Left key (d):                      Right Key (k):

Block 1 (20 Trials):      Symmetry                         Asymmetry

Block 2(20 Trials):        Positive                             Negative

Block 3 (20 trials):     Symmetry + Positive         Asymmetry + Negative

Block 4(20 trials):       Symmetry + Positive         Asymmetry + Negative

Block 5(20 Trials):      Asymmetry                        Symmetry

Block 6 (20 trials):    Asymmetry + Positive         Symmetry + Negative

Block 7 (40 trials): Asymmetry + Positive           Symmetry + Negative\

My IAT needs to be counterbalanced to account for order effects. Therefore, I need two counterbalance conditions: a "compatible" condition (appears above; Blocks appear in the original order of 1, 2, 3, 4, 5, 6, and 7) and an "incompatible" condition  (where the blocks will appear shuffled around, in the order of Block 5, 2, 6, 7, 1, 3, and 4). Participant 1 will do the compatible, participant 2 will do the incompatible, and so on.

The only problem is I'm at a complete loss for how to create a CounterBalance list implementing this. The incompatible condition has several changes in the Attribute/Target key mappings (ie., Block 1 in the "compatible" condition has Symmetry associated with d and Asymmetry associated with k, but in the "incompatible" condition Block 1 and 5 swap places, so Asymmetry is now associated with d and Symmetry with k for the first incompatible Block), but since I am not using syntax, I'm not quite sure how to implement this. If it's any help, the E=Prime article "INFO:Counterbalance Order Instead of Multiple Experiment Files [27710]" describes exactly what I'm looking to do, but I'm still not clear on how to do it. 

If anyone can provide any insight, it would be so greatly appreciated. 

 

[Michiel Spape]

Hi,

Two options:

1. Just create 1 version of the experiment with the one order (sequential), and another with the other order (move the ‘rows’ in the blocklist up and down). Run different versions depending on subject number.
2. As above, but add an OrderList (or something), just put in 2 rows, add version 1 first, version 2 second (it requires some work fiddling around with making one BlockListV1, and one BlockListV2 so you can change the orders), and set the randomisation to counterbalance. EPrime should use only one type.

I think the latter should do what you want – but I don’t currently have time to check so I hope this helps somehow somewhat!

Best,

Michiel

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[McFarlane, David]

Adding a bit of detail to Michiel's point (2): On the Selection tab of your OrderList, set Order to "Counterbalance", and set Order By to "Subject".

For more info, try searching this group for "counterbalance". In particular, see the threads at groups.google.com/g/e-prime/c/JtLh6DxqCbs, groups.google.com/g/e-prime/c/lRlUJzD0skI, and groups.google.com/g/e-prime/c/77cC8LaAzYM.

-- David McFarlane


On 2024-02-21 Wed 9:06 PM, Michiel Spape wrote:
> Hi,
>
> Two options:
>
> 1. Just create 1 version of the experiment with the one order (sequential), and another with the other order (move the ‘rows’ in the blocklist up and down). Run different versions depending on subject number.
> 2. As above, but add an OrderList (or something), just put in 2 rows, add version 1 first, version 2 second (it requires some work fiddling around with making one BlockListV1, and one BlockListV2 so you can change the orders), and set the randomisation to counterbalance. EPrime should use only one type.

>
> I think the latter should do what you want – but I don’t currently have time to check so I hope this helps somehow somewhat!
>
> Best,
>
> Michiel
>

> *From:* e-p...@googlegroups.com <e-p...@googlegroups.com> *On Behalf Of *Julia Dipassio
> *Sent:* Thursday, February 22, 2024 2:16 AM
> *To:* E-Prime <e-p...@googlegroups.com>
> *Subject:* PLEASE HELP- How to Counterbalance Order Instead of Multiple Experiment Files??

>
> Hello everyone,
>
> I am in urgent need of help with an E-Prime project (IAT) I am working on. I will be as detailed as I possibly can; I'm relatively new to the program.
>
> For context:
>
> I am conducting a standard 7 Block Implicit Association Test (Greenwald et al., 2003) using both pictures and words. I have 40 stimuli total. 20 are words (10 positive words, 10 negative words) and the other 20 are picture stimuli (10 being Symmetrical and the other 10 being Asymmetrical). Therefore, my "Target" labels are Symmetry and Asymmetry, and my "Attribute" labels are Positive and Negative.
>
> The layout of the blocks is as follows:
>
>                                           Left key (d):                      Right Key (k):
>
> Block 1 (20 Trials):      Symmetry                         Asymmetry
>
> Block 2(20 Trials):        Positive                             Negative
>
> Block 3 (20 trials):     Symmetry + Positive         Asymmetry + Negative
>
> Block 4(20 trials):       Symmetry + Positive         Asymmetry + Negative
>
> Block 5(20 Trials):      Asymmetry                        Symmetry
>
> Block 6 (20 trials):    Asymmetry + Positive         Symmetry + Negative
>
> Block 7 (40 trials): Asymmetry + Positive           Symmetry + Negative\
>

> My IAT needs to be counterbalanced to account for order effects. Therefore, I need *two* counterbalance conditions: a "compatible" condition (appears above; Blocks appear in the original order of 1, 2, 3, 4, 5, 6, and 7) and an "incompatible" condition  (where the blocks will appear shuffled around, in the order of Block 5, 2, 6, 7, 1, 3, and 4). Participant 1 will do the compatible, participant 2 will do the incompatible, and so on.

[Julia Dipassio]

Thank you both so much, your solutions worked. I appreciate your help!