LSAT Technical Reports

Predictive Validity of Accommodated LSAT Scores for the 2007–2011 Entering Law School Classes (TR 17-04)

This study was undertaken to evaluate the predictive validity of Law School Admission Test (LSAT) scores earned under accommodated testing conditions. Of special interest was the validity of scores obtained by accommodated test takers who tested under extra-time testing conditions (Accommodated/Extra Time subgroup). Of secondary interest was the validity of LSAT scores obtained by accommodated test takers who tested under standard time conditions (Accommodated/Standard Time subgroup).

The sample used in this study was drawn from 537 entering law school classes from 178 distinct law schools collected over a 5-year period. Predictive validity of LSAT score, undergraduate grade point average (UGPA), and Index score (which includes both LSAT score and UGPA combined) was assessed using first-year average (FYA) as the criterion. Results from this study suggest that LSAT scores, UGPAs, and Index scores for Accommodated/Extra Time test takers tend to overpredict FYAs. Additionally, results indicate that LSAT scores, UGPAs, and Index scores predict FYAs relatively well when accommodations unrelated to timing were given.

While considering the results of this study, the reader should keep in mind that these results are presented at the subgroup level, not the individual level. Consequently, although results suggest that performance (e.g., FYAs) is overpredicted for the Accommodated/Extra Time subgroup, the performance of a specific individual who received this accommodation may actually be underpredicted. Thus the results from this study should be evaluated with care.

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Additional reports in this collection

LSAT Performance With Regional, Gender, and Racial and Ethnic Breakdowns: 2011–2012 Through 2017–2018 Testing Years (TR 22-01)

The purpose of this report is to provide summary information about Law School Admission Test (LSAT) performance, including performance classified by country, region of the United States, gender only, race and ethnicity only, and both gender and race and ethnicity. Information regarding LSAT performance is summarized for the 2011–2012 through 2017–2018 testing years and compiled into a single report, enabling trends with regard to the performance and representation of various subgroups to be examined.