D-score for second blocks missing

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kerryneus	kerryneus posted 10 Years Ago Topic Details Share Topic
Group: Forum Members Posts: 3, Visits: 9	Hi, I've done a couple of complete run-throughs of my IAT, but the data output I get each time shows no values for expressions.db . On the other hand, expressions.da is showing values for the compatibletest1, compatibletest2, targetincompatiblepractice, incompatibletest1 and incompatibletest2. Should targetincompatiblepractice be included in the calculations of D? I am using Inquisit's "IAT with Word Stimuli" template.
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Dave	Dave posted 10 Years Ago ANSWER Post Details Share Post
Group: Administrators Posts: 13K, Visits: 109K	Expressions.da is the d score from just the practice (i.e., first) blocks for both pairings. (compatibletest1 and incompatibletest1) Expressions.db is the d score from just the test (i.e. second) blocks for both pairings. (compatibletest2 and incompatibletest2) The raw data files contain the D-scores calculating on a running, trial-by-trial basis in the respective columns. Since D-scores are difference scores, the db column will only contain values once there actually is data available from both compatibletest2 and incompatibletest2. The pure target- and attribute practice blocks do not factor into calculating D at all.
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