This study of the stability of parent behaviors toward toddlers over a 3-week period used both aggregated and nonaggregated data. Comparison of stability correlations indicated higher stabilities for aggregated scores, with the level of stability increasing as scores from additional single sessions were aggregated. (PCB)

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)

Describes procedures for identifying stimuli in the natural environment whose presence was associated with altered probabilities for both the initiation and persistence of noxious responses. (Author/SDH)

In research with children, there is a common problem which could reduce the reliability of a questionnaire for some children but not others: verbal comprehension. (Authors)