ERIC Number: EJ1073918
Record Type: Journal
Publication Date: 2015-Sep
Abstractor: As Provided
Reference Count: 15
General or Idiosyncratic Item Effects: What Is the Good Target for Models?
Courrieu, Pierre; Rey, Arnaud
Journal of Experimental Psychology: Learning, Memory, and Cognition, v41 n5 p1597-1601 Sep 2015
Recently, Adelman, Marquis, Sabatos-DeVito, and Estes (2013) formulated severe criticisms about approaches based on averaging item response times (RTs) over participants and associated methods for estimating the amount of item variance that models should try to account for. Their main argument was that item effects include stable idiosyncratic effects. In this comment, we provide supplementary empirical evidence that this assertion is indeed valid. However, the actual implications of this result are not those defended in Adelman et al. (2013), where there seems to be confusion about the precision of measures and the nature of target effects. Indeed, basic statistical considerations show that any arbitrary data precision level can be achieved in all cases using an appropriate number of observations per item, whereas general and idiosyncratic item effects are both targets of interest for modeling but in different objectives.
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Authoring Institution: N/A