Job Analysis Rating Analysis via Item Response Theory - IPAC

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Method• Physical agility test development• Task and ability inventory focused on 55 tasks• 141 respondents (engineers, captains, lieutenants)• Confirmatory approach (link existing “events” to jobanalysis results)• WinSteps software program
ResultsTwo assumptions of Rasch model:1. Unidimensionality2. Local IndependenceData fit the model relatively well:Principal components analysis of residuals (Linacre,1998)One dimension accounted for 64% of variance
Page 1 and 2: Job Analysis Rating Analysisvia Ite
Page 3 and 4: Despite Importance …• Perceived
Page 5: Why Item Response Theory?• Rasch
Page 9 and 10: Summary of Measured Items (Item Rel
Page 11 and 12: #12 Locates Hidden Fire by Feeling
Page 13 and 14: PERSONSMAP OF ITEMS|4 X +|||||3 +||
Page 15 and 16: EXPECTED SCORE: MEAN (":" INDICATES
Page 17 and 18: MOST MISFITTING RESPONSE STRINGSITE
Page 19 and 20: GUTTMAN SCALOGRAM OF RESPONSES:PERS
Page 21 and 22: Conclusions• Rasch model assumes
Page 23: Scale discriminates between the per

Job Analysis Rating Analysis via Item Response Theory - IPAC

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