Scoring the IAT (case 12779)

[slaurent]

First off, thanks for all the work in creating, adapting, and modifying this syntax, and posting it for all to use!

That said, I have a question about the syntax you posted (the referenced post is shown below). Because I have a more complex coding scheme than even #ed Ss = order 1 (e.g., white + good first) and odd Ss = order 2, I merged all files from each separate order together rather than merging both orders together. In effect, it is as if I have not counterbalanced order (I have, but I will deal with this in another way) - and thus, in each merged file there is a single order of presentation. Does anyone out there know of an easy fix to the syntax so that SPSS will NOT assume that I have different orders for odd and even #ed Ss when computing the D statistics? I'm not sure what part I need to take out. It seems as if it should be simple, but in fact, the syntax is rather complex in places and I'm not sure what part needs to be changed.

Thanks!

[QUOTE=jarvis24;2239][the following edited reply is taken from a summary post to the SPSP mailing list by Joseph Comeau]

I am sure you will get a lot of replies but if you don't, call me and i will walk you through easily changing the Inquisit syntax to work with Direct RT (all you need to do is transform the variables so they are named the same as in the syntax and check a couple of procedural things in your direct rt program). My cell is *** (I am a post doc of Mahzarin Banaji's).

This all assumes that you programmed and collected data using a 7-block IAT
[LIST=1][*]Merge all of your DirectRT files with the filemerge software that Blair Jarvis (from Empirisoft) that comes included with DirectRT (save the merged file as ".csv" -- it will pull into SPSS much better than .txt).[*]Pull the big huge file into SPSS.[*]In DirectRT, your trial #rs must begin with #1 (and go to whatever). SO: if the range in DirectRT is 5-380, you need to transform it to range from 1-376.[*]In DirectRT, your block numbers need to range from 1-7 (i recall default coding the blocks 0-6 so you will want to transform the numbers to range from 1-7)[*]In DirectRT your errors vs correct responses may have been coded
differently than the syntax needs. Your errors must be coded = 0 and correct responses = 1[*]A critical issue is one of IAT order. the IAT syntax thinks you ran all odd subjects as order #1 (e.g., black+bad & white+good) and all even subjects as order #2 (e.g., black+good & white+bad; see syntax from the IAT SPSS syntax below).[*]In the syntax file, you MUST change the order variable syntax or compute an appropriate "order variable" in your SPSS data file and then remome the part of the syntax that looks like this:

[code]*If order of the combined
tasks differs in some other fashion, provide an appropriate replacement
* for the following line (which works when order differs for odd and even
subject numbers) .
COMPUTE ORDER = mod(subj, 2) .
RECODE ORDER (0=2) .

[Goldenrude]

Being a total newbie to the IAT, i was wondering if anyone had a single IAT SPSS syntax to share ? I just used a single IAT in one of my experiment and i now need to look at the data and to be quite honest i don't know what to do

[padennis]

Being a total newbie to the IAT, i was wondering if anyone had a single IAT SPSS syntax to share ? I just used a single IAT in one of my experiment and i now need to look at the data and to be quite honest i don't know what to do

I'm all about posting ridiculously late responses right now. Hopefully this helps someone!

BTW, this is based on Greenwald, Nosek, and Banaji's (2003) scoring algorithm.

[domimazur]

Hi,

is this for a single category IAT or standard IAT?

[padennis]

Hi,

is this for a single category IAT or standard IAT?

This syntax was for a standard (racial bias) IAT. In fact, I believe that I used the exact same formatting, albeit different photos, as the version featured as an example in the DirectRT package. Hope that helps,

Paul

[ucsbbritt]

This syntax was for a standard (racial bias) IAT. In fact, I believe that I used the exact same formatting, albeit different photos, as the version featured as an example in the DirectRT package. Hope that helps,

Paul

I am new to Direct RT, and i am looking to score the sample race-IAT in Direct RT, so would this syntax apply to that?
thank you

[padennis]

I am new to Direct RT, and i am looking to score the sample race-IAT in Direct RT, so would this syntax apply to that?
thank you

Hi,
It's been so long since I've looked at the demo that I'm not sure whether my version directly corresponds to it. (I'd check, but I no longer have DirectRT on my computer.) I've attached the kind of run file that should produce a data file that can be analyzed via the SPSS syntax file that I posted earlier. The essential elements are that blocks 3 and 5 represent the blocks of trials that are compared. For example, block 3 pairs race A with adjective 1 and race B with adjective 2. Block 5 pairs race A with adjective 2 and race B with adjective 1. Again, I'm pretty sure that this run file is either a copy of or closely corresponds to the demo file.

Just follow the instructions in the SPSS syntax file (and be sure to read the article that I mentioned earlier to understand the calculations, which are really quite basic). Good luck!