Cognitive effort is costly and this cost likely influences the activities in which children engage. Yet, little is known about how school-age children perceive cognitive effort. The subjective value of cognitive effort, that is, how valuable or costly effort is perceived, was investigated in seventy-three 7- to 12-year-olds using an effort…

This study examined future-oriented behavior in children (3-6 years; N = 193) from three diverse societies--one industrialized Western city and two small, geographically isolated communities. Children had the opportunity to prepare for two alternative versions of an immediate future event over six trials. Some 3-year-olds from all cultures…

The present study examined age differences in performance on the Tower of London, a measure of strategic planning, in a diverse sample of 890 individuals between the ages of 10 and 30. Although mature performance was attained by age 17 on relatively easy problems, performance on the hardest problems showed improvements into the early 20s.…

Data provide strong evidence that studies of stress and cortisol release in infants must take into account basal level, circadian rhythm, and behavioral effects and employ appropriate statistical procedures. Participants were infants of two, four, and six months of age from whom salivary cortisol was obtained before and 15 minutes after an…

A parent-report questionnaire, the Child Routines Inventory (CRI), was administered to 1,492 parents with children between 8 and 72 months of age. Results indicated that frequency of compulsive-like behaviors is more common among 2-, 3- and 4-year olds than among children younger than 1 year or over 4 years of age. Findings are relevant to a…

Examined consistency in behavioral state organization for 30 fetuses and neonates. Assessed heart rate pattern and presence or absence of eye and gross body movements during sleep, finding quiet sleep (QS), active sleep (AS), and indeterminate states in nearly identical proportions. Duration of enclosed QS epochs provided only stable measure of…

Results suggest that the most adaptive course of action for children may be to be responsive to environmental demands and interpersonal constraints. In the study, the patterns of compliance of 31 children of 18 months, 32 children of 24 months, and 36 children of 30 months, and their mothers and fathers were observed in five situations. (RH)

Findings are interpreted in terms of search strategy and memory. (Authors)

To determine whether behavioral differences exist between attractive and unattractive children, 64 boys and girls aged three and five years were selected on the basis of physical attractiveness and were paired in same age, same sex, and attractive and unattractive dyads. These dyads were then observed in a seminaturalistic play setting. (JMB)

Investigates the representative frequencies of aggression of 43 children at the ages of 2 and 5 years. Dimensions of physical aggression at age 2 predicted dimensions of physical aggression at age 5. Frequency, initiations, and average length of aggression decreased between 2 and 5 years of age. (RJC)

Children's ability to produce integrated sequences of discrete behaviors was examined as a function of age and task demands for several behavioral domains. Results are discussed in terms of possible age-related constraints on combinatorial skills that operate at a general, cross-domain level during toddlerhood. (RH)

Reports two experiments in which eight patients with organic memory disorders exhibited a pattern of search behavior that resembled mnemonmic precedence--the ability to retrieve an object at an initial location, but not at a new location. (HOD)