Convergence between cluster analysis and the Angoff method for setting minimum passing scores on credentialing examinations.

Abstract:

:Cluster analysis can be a useful statistical technique for setting minimum passing scores on high-stakes examinations by grouping examinees into homogenous clusters based on their responses to test items. It has been most useful for supplementing data or validating minimum passing scores determined from expert judgment approaches, such as the Ebel and Nedelsky methods. However, there is no evidence supporting how well cluster analysis converges with the modified Angoff method, which is frequently used in medical credentialing. Therefore, the purpose of this study is to investigate the efficacy of cluster analysis for validating Angoff-derived minimum passing scores. Data are from 652 examinees who took a national credentialing examination based on a content-by-process test blueprint. Results indicate a high degree of consistency in minimum passing score estimates derived from the modified Angoff and cluster analysis methods. However, the stability of the estimates from cluster analysis across different samples was modest.

journal_name

Eval Health Prof

authors

Hess B,Subhiyah RG,Giordano C

doi

10.1177/0163278707307904

subject

Has Abstract

pub_date

2007-12-01 00:00:00

pages

362-75

issue

4

eissn

0163-2787

issn

1552-3918

pii

30/4/362

journal_volume

30

pub_type

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