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Lamb, Michael E.; Chuang, Susan S.; Wessels, Holger; Broberg, Anders G.; Hwang, Carl Philip – Child Development, 2002
This longitudinal study investigated the validity of the Five Factor Model of personality with Swedish children ages 2 to 15 years. Findings of item analyses showed consistently reliable irritability, conscientiousness, and positive activity factors, while internal reliability of other factors increased over time. Found that irritability and…
Descriptors: Adolescents, Children, Foreign Countries, Longitudinal Studies
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Bates, John E.; And Others – Child Development, 1979
The Infant Characteristics Questionnaire (ICQ) was developed as a short, factor-analytic screening device for difficultness. Responses of 322 mothers of four- to six-month-old infants suggested that they regard fussy, hard-to-soothe, labile infants as difficult. Mother characteristics may affect perceptions of infant difficultness with…
Descriptors: Infants, Measurement Instruments, Measurement Techniques, Mothers