This experiment was designed to explore the effects of simple and remedial altruism upon children's subsequent self-reinforcement, generosity, and performance quality estimates. (CS)

To assess the validity of attachment scores derived from the Ainsworth "strange situation", 56 1-year-olds and 79 2-year-olds accompaned by either the mother, the father, or a brief acquaintance were studied. Proximity to the adult, duration of play, crying, activity, and the incidence of looks and distance bids were measured. (Author/CS)

Observations were made to determine: (1) how important to 2-year-olds is face-to-face contact with the mother, and (2) if attachment behaviors, such as looking at, talking to, and being close to mothers, interact with visual behaviors. (Author/CS)

A series of tests was designed for 24-, 30-, and 36-month-olds to measure their ability to apply various gender labels to the appropriate sexes, their capacity to place themselves in their own gender category, and their usage of labels to guide preference behavior. (Author/CS)

To examine the relationship between visual attention in infancy and the stimulus variables of contour and numerosity, 2- and 4-month-olds were placed in three experimental conditions. The results showed that contour and numerosity, acting in tandem, are responsible for the age-complexity shift observed by previous investigators of infant…

The effectiveness of continuous stimulation in lowering arousal level, as indexed by state and heart rate, was studied in 30 uncircumcised males, 30 circumcised males, and 30 female subjects. The continuous-stimulation effect was shown to be directly related to auditory stimulus intensity. (Author/CS)

The relative strength of mastery motivation and need for approval was tested in subjects, ages 4 and 10. Mastery motivation was of major importance to the older children, particularly the boys. Contrary to prediction, approval was not of major importance to the young children. Need for approval was important for girls, but not boys. (Author/CS)

Black and white kindergarten and second-grade children were tested for accuracy of detection and recognition of orientation and location changes in pictures of real-world and geometric figures. The purpose was to test children's ability to detect and remember objects in a visual display. (Author/CS)

This study investigated the development of the concept of a critical search area by means of an action sequence in which a cartoon character loses his toy while walking through his house. The results showed that it is not until ages 7 or 8 that children readily make the inference that the critical area is the only plausible place to search for the…

This study investigated the use of covariation as a principle of causal analysis in children 3-4, 6-7, and 9-11 years of age. The results indicated that children as young as 3 years were capable of using covariation information in their attributions of simple physical effects. (Author/CS)

The purpose of this study was to determine the extent to which verbal processes influence recognition memory for visual scenes in preschool children. Children were shown line drawings of 12 pairs of items and were asked to describe them. One week later, a recognition test was given in which ability to remember elaborated and unelaborated pictures…

In an attempt to examine the generalizability of the Kendler S-R mediational model of reversal-shift behavior, 60 third-grade children were classified as either verbal mediators or nonmediators on the basis of their performance on an optional-shift discrimination problem. The children's performances were then evaluated on three tasks. (Author/CS)

This study tested the hypothesized relationship between overt sensorimotor ordering experiences and relational responding in preschool children. (Author/CS)

A critical examination of two key aspects of Piaget's account of how small children come to understand basic number concepts. (Author/CS)