This purpose of this qualitative dissertation study was to capture the meaning and various dimensions related to being an undocumented immigrant youth in the United States, and to develop a grounded theory regarding how undocumented immigrant students negotiate their identity development in light of these dimensions. A semi-structured interview…

Argues that a better understanding of developmental processes is provided by three types of operant research -- laboratory behavioral descriptions, descriptions of naturalistic behavior-environment interdependencies, and predictive naturalistic studies. The usefulness of these processes are examined in light of the goals of life span developmental…

Analyzes the logical basis of testing developmental order hypotheses with categorical measures. Argues that depending on whether saltatory or continuous developmental changes are being assessed, the observed relationship between categorical measures yields different types of information about developmental ordering. Maintains that when change is…