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The Standardized Letter of Recommendation: Implications for Selection SLR

Liu, Ou Lydia; Minsky, Jennifer; Ling, Guangming; Kyllonen, Patrick C.
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Report Number:
ETS Research Report
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Subject/Key Words:
Rasch Model, Standardized Letter of Recommendation (SLR), Reliability, Item Fit Statistics


A multidimensional Rasch investigation suggests that the seven scales of the SLR displayed satisfactory psychometric properties in terms of reliability, model fit, item fit statistics, and discrimination. The two cognitive scales, knowledge and analytical skills, were found to be the best predictors for intern selection. The professor ratings and mentor ratings had moderate to high correlations, with the professor ratings being systematically higher than the mentor ratings. Possible reasons for the rating discrepancies are discussed. Also, implications for how the SLR can be used and improved in other selection situations are suggested.

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