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Lewis, Michael; Johnson, Norma – Child Development, 1971
Data from infants unable to complete experimental sessions were compared to those for whom there were complete data. Results suggest that the elimination of large numbers of infants may have a potentially biasing effect on reported data. (Authors)
Descriptors: Data Analysis, Infant Behavior, Infants, Reliability

Mann, Janet; And Others – Child Development, 1991
Demonstrated that time sampling is inaccurate for estimating durations or frequencies of behaviors. Also concluded that (1) individual or group differences can change depending on whether time sampling or continuous sampling is used; and (2) error rates are high when bout lengths of behaviors are short or when interval length is long. (BC)
Descriptors: Data Collection, Individual Differences, Infants, Mothers

Schwarz, J. Conrad; And Others – Child Development, 1985
Examines the reliability and validity of the scores of diverse informants from the Child's Report of Parental Behavior Inventory (CRPBI). Also considers the utility of aggregating scores of parental behavior derived from multiple observers. CRPBI items were adapted to obtain mother's, father's, sibling's, and subject's ratings of parental behavior…
Descriptors: Child Rearing, Data Collection, Measures (Individuals), Parent Child Relationship