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50 Years of ERIC
50 Years of ERIC
The Education Resources Information Center (ERIC) is celebrating its 50th Birthday! First opened on May 15th, 1964 ERIC continues the long tradition of ongoing innovation and enhancement.

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ERIC Number: ED449213
Record Type: RIE
Publication Date: 2001-Feb
Pages: 16
Abstractor: N/A
Reference Count: N/A
Restriction of Range: The Truth about Consequences and Corrections.
Weber, Deborah A.
Restriction of range occurs whenever design or circumstances abbreviate the values of one or both variables being correlated. Range restriction has an impact on score validity, score reliability, and statistical power. As a result, researchers need a more sophisticated concept of the relationship between variance and correlation than the simple assumption that when variance goes down, correlations decrease. The shape of the distribution and selection procedures also influence whether restriction of range increases, decreases, or does not affect correlation. (Contains 16 references.) (SLD)
Publication Type: Reports - Descriptive; Speeches/Meeting Papers
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers: Restriction of Range
Note: Paper presented at the Annual Meeting of the Southwest Educational Research Association (New Orleans, LA, February 1-3, 2001).