The developmental science literature is riven with respect to (a) parental similar versus different treatment of siblings and (b) sibling similarities and differences. Most methodologies in the field are flawed or confounded. To address these issues, this study employed a within-family longitudinal design to examine developmental processes of…

The vocabulary size of 16- to 30-month-old children (N = 1235) was assessed using the Estonian adaptation of the MacArthur-Bates Communicative Development Inventory: Words and Sentences (ECDI-II). The relationship between children's expressive vocabulary size and different factors of the child and his/her social environment was examined. Results…

The aim of the study was to examine differences in children's generalised trust and the maternal behaviour, child temperament, and demographic factors on the levels of trust in children. A total of 314 mothers and their children participated in the study. Results showed no evidence of sex differences in children's beliefs. Children living in urban…

Research Findings: Sibling teaching and learning behaviors were investigated in 2 studies of children in early and middle childhood. Study 1 addressed individual differences in teaching/learning and associations with dyadic age, age gap, gender, birth order, and relationship quality in 71 middle-class dyads (firstborns M age = 81.54 months;…

(Purpose) The present study sought to enhance the understanding of 1148 Thai and Muslims college students' resilience during the time of insurgent terrorism in the southernmost province of Thailand, Pattani. (Methodology) Resilience scale based on Grotberg three features of "I HAVE," "I AM" and "I CAN" was developed…

Using data from the American Time Use Survey, I find that a first-born child receives 20-30 more minutes of quality time each day with his or her parent than a second-born child of the same age from a similar family. The birth-order difference results from parents giving roughly equal time to each child at any point in time while the amount of…

The large and rapidly expanding body of literature on bilingual acquisition is mostly comprised of either single-case or cross-sectional studies. While these studies have made major contributions to our understanding of bilingual children's language development, they do not allow researchers to compare and contrast results with regard to…

Similarities and differences in adolescent siblings' free time activities were investigated. Firstborns and second-borns from 181 predominantly White, working, and middle-class families reported on their time use and sibling relationships. Their parents reported on their socioeconomic status and neighborhood characteristics. Cluster analysis…

Noting that previous research showed younger siblings systematically more sexually active at given age than older siblings, used national data to explore relationship between sibling birth order and sexual behavior. Testing of process-oriented models revealed very slight support for opportunity model for white older sisters and white younger…

Compared the early recollections of 50 first-borns and 98 later-borns. The first-borns mentioned significantly more nonfamily members, illness/injury, hospital/doctor's office. Later-borns mentioned significantly more siblings than did first-borns. Findings were discussed in the context of Adler's personality theory. (JAC)

The relationship between vocational preferences of adolescents and their birth order was examined. Firstborns were found to be overrepresented in the conventional and enterprising areas; later borns were found to be overrepresented in the social and investigative areas. (Author/GK)

It was hypothesized that first borns would prefer person- and intellectually-oriented occupations. It was also predicted that women, more than men, would prefer person-oriented occupations. The Hebrew version of Roe's classification of occupations was completed by 146 individuals. Only the second hypothesis was confirmed. (Author/SE)

Because there are so many chance factors that potentially affect the psychological development of gifted students, the outhor has sorted them into categories. For example, there are genetic, lifestyle, environmental, overarching vs. instance, experiential, and coincidental chance factors. To do justice to this topic, a series of columns will focus…