Stimulus over-selectivity is said to have occurred when only a limited subset of the total number of stimuli present during discrimination learning controls behavior, thus, restricting learning about the range, breadth, or all features of a stimulus. The current study investigated over-selectivity of 100 typically developing children, aged 3-7…

This study aims to examine the developmental changes in young children's perception. A matching completion task consisting of three geometric figures and one bird-like figure were completed by children 3-5 years of age ("N" = 99). The rotation effect, in which the correct response decreased with orientation (45°, 90° 135°, and 180°), was…

Efforts to identify biological correlates of internalizing symptoms in childhood have involved examinations of HPA-axis functioning, namely Cortisol Awakening Response (CAR). However, research has not assessed the relationship between CAR and internalizing problems among children younger than 8 years. Findings with older samples have been somewhat…

Moderate, yet relatively consistent, associations between cognitive performance and shyness have been reported throughout the child and adult literatures. The current study assessed longitudinal associations between cognition (i.e., executive functioning) and parent-report temperamental shyness from infancy to early childhood and used temporal…

This study investigates whether preschool-aged children show consistent patterns of behaviour in conflicts with their siblings. Consistency was assessed at the nomothetic (i.e., group), idiographic (i.e., individual), and idiosyncratic (i.e., consistent patterns that differed from the norm) levels. We examined conflicts between 19 2-year-old and…

Research on children's knowledge of illnesses has largely concentrated on studying how children reason about common innocuous diseases. It is also important to uncover how children reason about more severe diseases, such as cancer, to be able to treat and communicate with children diagnosed with this disease. Several aspects of prevalent childhood…

Two studies examined children's concept acquisition for complex emotions. Four- to seven-year olds described situations that evoke a variety of emotions and their feelings about each; four- and five-year olds rated the same emotions for feelings of pleasure and arousal. Combined results suggest children attain partial conceptualization of each…

Clarified the developmental processes of awareness of relationships between duration, distance, and speed relative to linear movement. Children began with near awareness of the direct relationships between duration and distance and distance and speed. However, correct grasp of these direct relationships seemed to strengthen an incorrect grasp of…

A total of 41 children ranging in age from 9 months to 6 years, 6 months of age were observed playing at game-like tasks. Disruptive interventions were made at different times and with different levels of intensity. Children's reactions revealed developmental stages in wanting to do things by themselves; stages varied with the development of…

Argues that Susan Sugarman's article in this issue contains some valid criticism of assumptions in developmental psychology, but that some of her conclusions regarding other assumptions need to be questioned. Suggests that many problems raised by Sugarman would disappear if developmental psychologists concentrated on children's early achievements…

Examined whether children were likely to associate animate-type or inanimate-type of movement with living objects and whether this judgment varies with age. Children and adults participated in the study. Findings suggest that both knowledge about different life properties and overattribution are characteristic of the preschool period. (BAC)

Argues that there are significant ways in which neither Piaget nor his successors in developmental psychology have adequately described the child's mind and how it changes. Proposes alternative guidelines for research that aims more directly at identifying essential constituent features of the child's mental reality. (PCB)

We investigated the nature of graphic formulas in 5-, 7-, and 9-year-old children when they were asked to draw a house and a television in a free condition, and then to draw from photographs of these objects. Assuming that the frequency of occurrence of a feature in children's drawings reflects its semantic weight, we studied the relations between…

Focuses on whether developmental trends observed within groups are different between groups (cultures) in three- to six-year-old children in a battery of tests derived from a theoretical model relating to attention, learning, and memory processes. Subjects were selected from Cambridge, Massachusetts and from two lowland villages in Guatemala.…

Two experiments examined the development of children's memory for spatial location or color. Results refuted the proposal that in contrast to color, spatial location would not show developmental improvement because it is remembered automatically. Suggests that, for the age range studied, there was developmental change in the efficiency of…