Examining test-retest reliability: an intra-class correlation approach.

Abstract:

BACKGROUND:There are limitations of inter-class correlation (usually, the Pearson's product-moment correlation) in evaluating reliability of an instrument. An intra-class correlation approach would be appropriate to examine the test-retest reliability of an instrument. OBJECTIVES:To introduce an intra-class correlation approach to examine the test-retest reliability of an instrument. METHOD:The method of constructing an intra-class correlation coefficient was presented. RESULTS:The instrument with visual analog scales to measure the perceived competence to practice breast self-examination and perceived barriers to breast self-examination was tested. The intra-class correlation coefficient was 0.640. CONCLUSION:The intra-class correlation is an alternative to test the reliability of an instrument and it is more sensitive to the detection of systematic error.

journal_name

Nurs Res

journal_title

Nursing research

authors

Yen M,Lo LH

doi

10.1097/00006199-200201000-00009

keywords:

subject

Has Abstract

pub_date

2002-01-01 00:00:00

pages

59-62

issue

1

eissn

0029-6562

issn

1538-9847

journal_volume

51

pub_type

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