Quantitative growth curve models for estimating individual developmental functions from various types of longitudinal data are discussed in the context of investigator assumptions and research design characteristics. Linear and nonlinear models that estimate growth curves are illustrated, and contrasted when they are fit to speech development…

Predicted children's loneliness and social satisfaction growth curves based on changes in peer victimization status from kindergarten through third grade. Found that trajectories for children moving from nonvictim to victim classification showed increasing loneliness and decreasing social satisfaction. However, moving from victim to nonvictim…

Elaborates on the basic thesis developed by Rothbaum et al., underscoring the significance of the co-constructive process of the self and social relationship. Discusses implications for future cultural psychological inquiry in this area. (Author/KB)

Two experiments used Visual Expectations Procedure to investigate development of expectations in infants up to 12 months old. Reaction time improved and the percentage of anticipations increased between 6 and 9 months using an alternation pattern or a complex pivot pattern, and between 4 and 8 months when using a left-right alternation or a…

Considers the nature and developmental functions of physical activity play. Distinguishes three kinds of physical activity play with consecutive age peaks: rhythmic stereotypies, exercise play, and rough-and-tumble play. Considers gender differences and function in terms of immediate and deferred consequences in physical, cognitive, and social…

Tested the individual characteristics and deviant peer association theoretical models of friends' influence on the development of delinquency in disruptive boys. Found that moderately disruptive boys with aggressive-disturbing friends were more delinquent at age 13 than other subgroups of moderately disruptive boys. Highly disruptive and…

Investigated mothers and children's concepts of children's areas of personal discretion, autonomy, and individuality. Findings indicated that mothers viewed their roles as educators and nurturers and valued the development of individuality in their children. Gender differences were found in the ways mothers characterized boys' and girls'…

Examined children's mathematical competencies between ages 7 and 9. Found no differences in developmental rate between children with math difficulties only (MD), math and reading difficulties (MD-RD), reading difficulties only (RD), and normal math/reading achievement (NA). Found that at end of Grade 3, MD group performed better than MD-RD group…

Used heart rate and respiratory sinus arrhythmia (RSA) assessed at 33 to 35 weeks gestational age to predict developmental outcome at 3 years for very low birth weight infants. Found that RSA measures predicted developmental outcome beyond effects of birth weight, medical risk, and socioeconomic status. For infants < 1,000 grams, RSA maturation…

Examined the development of proportional reasoning by means of a temperature mixture task. Results show the importance of distinguishing between intuitive knowledge and formal computational knowledge of proportional concepts. Provides a new perspective on the relation of intuitive and computational knowledge during development. (GLR)

Tested understanding of correspondence on the part of 2.5- to 3.5-year olds who watched a toy hidden in a model and tried to find an analogous toy in a room. Retrieval scores increased with increasing model-room similarity; were higher for older than younger children; and were affected by object and size similarity. (BC)

Used time-lapse video to record sleep/wake states of preterm infants for three 24-hour periods at 33 and 35 weeks conceptional age. Found that very-low-birthweight preterm infants showed marked stability and developmental change in the organization of sleep/wake states from a very early age, and their states were related to demographic variables…

Maintains that conflict in close relationships characterizes both the United States and Japan, with differences only in the style and timing of its manifestations. Asserts that the potentially fruitful strategy of Rothbaum et al. is constrained by their cross-cultural comparative methodology. (Author/KB)

Notes that commentators unanimously support Rothbaum et al.'s general orientation to culture and development and their developmental pathways. Views commentators' suggestions as relating to trade-offs: between theories that highlight generalization or exceptions; between methods that rely on one-, two-, or multiculture studies; and between values…

Discusses responsibility of developmental scientists to convey the complexity of development lest oversimplified popular accounts gain credibility. Presents a model of development elaborating on the role of experience in relation to constitutional, cultural, economic, and social factors contributing to children's development. Discusses importance…