Job Analysis Rating Analysis via Item Response Theory - IPAC

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Item 47 -- Extinguishes grass fires with shovel or rake. (1)Item 17 -- Carries equipment and hose to upper floors of buildings(2)Item 9 -- Drags victims while crouched low (3)Item 49 -- Constructs fire line in brush or wooded area using abrush hook, Pulaski, or double bit axe. (53)Item 55 -- Unfolds fire shelter and covers oneself in it whennormal exits from a fire are blocked in order to shield oneself fromadvancing heat and flame. (54)Item 12 -- Locates hidden fire by feeling walls and ceiling or bysmelling fire. (55)
Conclusions• Rasch model assumes interval properties (only way to examinedata)• Job analysis Guidelines:• Limited guidance regarding how to measure• No guidance regarding how to analyze• Benefits of IRT• Additional means of analyzing data• Provides additional information beyond means and standarddeviations• Method of assessing utility of scale anchors• Possibility of adaptive job analysis questionnaires
Page 1 and 2: Job Analysis Rating Analysisvia Ite
Page 3 and 4: Despite Importance …• Perceived
Page 5 and 6: Why Item Response Theory?• Rasch
Page 7 and 8: ResultsTwo assumptions of Rasch mod
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: GUTTMAN SCALOGRAM OF RESPONSES:PERS
Page 23: Scale discriminates between the per

Job Analysis Rating Analysis via Item Response Theory - IPAC

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