IAT Results - d-Scores already according to standard metric?

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IAT Results - d-Scores already according to standard metric?

IAT Results - d-Scores already according to standard metric?

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Blues	Blues posted 11 Years Ago Topic Details Share Topic
Group: Forum Members Posts: 3, Visits: 15	Hello again, I have one more quick question regarding the final d-scores that are displayed in Inquisit's .dat files after collecting data with a PictureIAT script. I came across this thread here a while ago: https://www.millisecond.com/forums/Topic3444-1.aspx It says that the scores collected by Inquisit's IAT, that can be seen in the .dat files ("expressions.d" mainly), are already the d-scores that represent the standard metric used for IAT's. It also says that these are the same d-scores that you would get if you ran the SPSS syntax that is located on the Inquisit IAT Task Library webpage, which follows Greenwald's improved scoring algorithm from 2003. So, that would mean that the d-scores in the .dat file are already in the right format and need no further analysis, right? However, if that's the case, I'm kind of curious as to why that SPSS syntax is still offered on the IAT Task Library page, if one actually does not require it. I mean, if one were to use that syntax on the present .dat file, wouldn't all the extra calculations change the data from the already correct scores into something different? Am I maybe misunderstanding something? Also, is there any notice anywhere on Millisecond of the fact that Inquisit already outputs d-scores according to Greenwald's improved algorithm, for citation purposes? Thanks again!
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Dave	Dave posted 11 Years Ago ANSWER Post Details Share Post
Group: Administrators Posts: 13K, Visits: 108K	> So, that would mean that the d-scores in the .dat file are already in the right format and need no further analysis, right? Yes. > However, if that's the case, I'm kind of curious as to why that SPSS syntax is still offered on the IAT Task Library page, if one actually does not require it. To double-check the results, offer a starting place for further analysis, etc. etc. > I mean, if one were to use that syntax on the present .dat file, wouldn't all the extra calculations change the data from the already correct scores into something different? No, why would that be? The scores are calculated from the raw latency data (latency column), it doesn't matter if there's expressions.d etc already in the data file. Read the SPSS syntax for yourself to see how it proceeds. > Also, is there any notice anywhere on Millisecond of the fact that Inquisit already outputs d-scores according to Greenwald's improved algorithm, for citation purposes? It's discussed at great length in the very topic you referenced: https://www.millisecond.com/forums/Topic3444.aspx. Not sure what you mean by "for citation purposes", properly citing the work you use (here: Greenwald et al. 2003), would be up to you.
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