ERIC Number: ED449213
Record Type: RIE
Publication Date: 2001-Feb
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
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).