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ERIC Number: EJ806490
Record Type: Journal
Publication Date: 2005-Dec
Pages: 13
Abstractor: As Provided
Reference Count: 28
ISBN: N/A
ISSN: ISSN-0734-2829
An Investigation of the Reliability and Standard Error of Measurement of Words Read Correctly Per Minute Using Curriculum-Based Measurement
Poncy, Brian C.; Skinner, Christopher H.; Axtell, Philip K.
Journal of Psychoeducational Assessment, v23 n4 p326-338 Dec 2005
Generalizability (G) theory was used with a sample of 37 third-grade students to assess the variability in words correct per minute (WCPM) scores caused by student skill and passage variability. Reliability-like coefficients and the SEM based on a specific number of assessments using different combinations of passages demonstrated how manipulating probe variability could reduce measurement error. Results showed that 81% of the variance was due to student skill, 10% was due to passage or probe variability, and 9% was due to unaccounted sources of error. Reliability-like coefficients ranged from .81 to .99, and SEMs ranged from 18 to 4 WCPM depending on the number of probes given. When passage variability was controlled, SEMs were decreased and ranged from 12 to 4 WCPM. Results indicated that WCPM scores yield high reliability-like coefficients but also have a large SEM that can be reduced by administering multiple alternate passages. Discussion focuses on conducting research designed to identify more equivalent passages in order to reduce erroneous relative and absolute decisions. (Contains 4 tables.)
SAGE Publications. 2455 Teller Road, Thousand Oaks, CA 91320. Tel: 800-818-7243; Tel: 805-499-9774; Fax: 800-583-2665; e-mail: journals@sagepub.com; Web site: http://sagepub.com
Publication Type: Journal Articles; Reports - Evaluative
Education Level: Elementary Education; Grade 3
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers - Location: Iowa