title: Measuring automatic associations: validation of algorithms for the Implicit Association Test (IAT) in a laboratory setting.
abstract: OBJECTIVE
  In their paper, "Understanding and using the Implicit Association Test: I. An improved scoring algorithm", Greenwald, Nosek, and Banaji (2003) investigated different ways to calculate the IAT-effect. However, up to now, it remained unclear whether these findings - based on internet data - also generalize to laboratory settings. Therefore, the main goal of the present study was to cross-validate scoring algorithms for the IAT in a laboratory setting, specifically in the domain of psychopathology.
  
  
  METHODS
  Four known IAT algorithms and seven alternative IAT algorithms were evaluated on several performance criteria in the large-scale laboratory sample of the Netherlands Study of Depression and Anxiety (N = 2981) in which two IATs were included to obtain measurements of automatic self-anxious and automatic self-depressed associations.
  
  
  CONCLUSIONS
  Results clearly demonstrated that the D(2SD)-measure and the D(600)-measure as well as an alternative algorithm based on the correct trials only (D(noEP)-measure) are suitable to be used in a laboratory setting for IATs with a fixed order of category combinations. It remains important to further replicate these findings, especially in studies that include outcome measures of more spontaneous kinds of behaviors.
authors.affiliation: Department of Clinical Psychology, University of Groningen, Grote Kruisstraat 2/1, 9712 TS Groningen, The Netherlands. k.a.glashouwer@rug.nl
authors.forename: Klaske A
authors.initials: KA
authors.lastname: Glashouwer
authors.forename: Fren T Y
authors.initials: FT
authors.lastname: Smulders
authors.forename: Peter J
authors.initials: PJ
authors.lastname: de Jong
authors.forename: Anne
authors.initials: A
authors.lastname: Roefs
authors.forename: Reinout W H J
authors.initials: RW
authors.lastname: Wiers
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000465:Algorithms; D001007:Anxiety / Q000175:diagnosis*; D001244:Association; D001290:Attitude; D003071:Cognition; D015331:Cohort Studies; D003863:Depression / Q000175:diagnosis*; D001330:Electronic Data Processing; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009426:Netherlands; D011594:Psychometrics; D011795:Surveys and Questionnaires; D055815:Young Adult