Although previous research has identified a number of interesting aspects of future thinking in adults, little is known about the developmental trajectory and coherence of future-oriented behaviors during early childhood. The primary goal of this study was to explore these issues by administering a battery of tasks assessing different aspects of…

Discriminating what is pretense from what is real is a fundamental problem in development. Research has addressed the proficiency with which adults and children discriminate between play fighting and real fighting, and yet none (to our knowledge) has investigated discrimination of other kinds of pretense and real acts. In addition, little is known…

Tests of executive functions and control tasks not assessing executive function were administered to 19 individuals (ages 6-28) mild hyperphenylalaninemia (MHP) and 19 controls. Tests of academic skills and behavior-rating questionnaires were also administered to the group with MHP. No group differences were found for any measure. (Contains…

Interpretation of experimental tasks is influenced by knowledge of the language used, by assessment of what the experimenter intends, and by how subjects themselves would normally represent the physical situation. Whether these processes in which children engage in cognitive studies differ from those employed by adults in similar tasks was…

Three experiments explored the conditions under which inductive inferences about people were made by children and adults. Results indicated that children often predicted that people would behave differently in the future than they did in the past. Younger children limited predictions of consistency to non-psychological events. Older children…

Noting that beyond the individual variations among humans, there is a body of mental abilities common to every human being, this book examines the debate among researchers about the extent to which humans are "preprogrammed," and suggests a new scientific psychology of human development. By examining experimental data obtained from…

Recent investigations have demonstrated greater variance in change in intellectual performance between different generations or age groups than is true for generalized developmental change across chronological age. Such findings have led to a careful investigation of certain environmental factors which might account for such change. A new…