While personality is relatively stable over time, it is also subject to change across the entire lifespan. On a macro-analytical level, empirical research has identified patterns of normative and differential development that are affected by biological and environmental factors, specific life events, and social role investments. On a…

Dabrowski's ideas about personality development are not only a source of practical recommendations for assisting the development of persons of varied age but can also be an inspiration for research. The theory is exceptionally helpful in describing developmental phenomena. Cases of multilevel development were studied in autobiographies of 7…

This article provides a review and synthesis of concepts, research programs, and measures in the infant and child temperament area. First, the authors present an overview of five classical approaches to the study of child temperament that continue to stimulate research today. Subsequently, the authors carve out key definitional criteria for…

The authors offer a new, integrative conceptualization of the relational self based on a synthesis of recent approaches to the self and significant others. This conceptualization provides a sharper and fuller definition of the relational self than does any existing approach alone and a common framework to interpret findings from separate…

We investigated the development of ego-control (EC) and ego-resiliency (ER) over a 13-year period in a cohort of Swedish children first assessed at 2 years of age. Children became more ego-controlled over time although individual differences in EC remained stable. Children's levels of resiliency increased from 2 to 3 years of age and then declined…

Researchers in the fields of cognitive and language development have made less use of large-scale longitudinal designs and of person-centered approaches to data analysis than have researchers in the fields of social and personality development. It is argued that differences among domains of developmental psychology in the research methods employed…