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…

Presents a global overview of psychological approaches to the individual problem of self-definition. Self-reflection and the experienced presence of others discussed as two "pillars" of that problem. A developmental sketch is given, and two forms of problems (self-concept contradictions and identity problems) distinguished. Resolutions…