In this article, we aim to shed light on a technique to study intra-individual variability that spans the time frame of seconds and minutes, i.e., micro-level development. This form of variability is omnipresent in behavioural development and processes of human experience, yet is often ignored in empirical studies, given a lack of proper analysis…

The timing of having one's first child, in relation to the timing of other transitions into adulthood and to social functioning, was investigated based on the Finnish Jyvaskyla Longitudinal Study of Personality and Social Development, conducted from age 8 (173 females and 196 males) to 42. Results showed that in women, relatively early (less than…

Presents an overview of the topics of planning and control to provide a context for the articles in this issue of the journal. Considers development across the life span, subgroup variations, and correlates. Also explores potential linkages between planning and control. (MM)

Analyzes multiple components of planning, including problem representation, goal selection, a decision to plan, strategy choice, strategy execution, and monitoring. Analyzes three tasks typically used to study planning: the Tower of Hanoi; errand scheduling; and story comprehension. Argues that the components required to perform a planning task…

Reviews the major transitional object (TO) theories in terms of origin, development, and psychological meaning. Examines the validity of TO (intense, persistent attachments young children develop for blankets, soft toys, and bits of cloth) theory in light of current empirical knowledge of TO behavior. (HOD)