A fundamental property of extinction is that the behavior that is suppressed during extinction can be unmasked through a number of postextinction procedures. Of the commonly studied unmasking procedures (spontaneous recovery, reinstatement, contextual renewal, and rapid reacquisition), rapid reacquisition is the only approach that allows a direct…

Analyzed free play of 24 preschoolers (3 to 4 years old), half of whom had disabilities. Found that the proportions of time that each child spent interacting with peers and with adults were negatively correlated for 21 of the children. After an adult had initiated an interaction with them, children were less likely to initiate interaction with a…

Objective: This study was designed to examine context effects or provocation ecologies in the daily lives of children with ADHD. Method: Across 7 days, mothers and children (27 children with attention-deficit/hyperactivity disorder [ADHD] taking stimulant medication; 25 children without ADHD; ages 7-12 years) provided electronic diary reports…

Growth during the last 2 years of high school was examined in public and Catholic high schools using data from the High School and Beyond database--a large, nationally representative study. Earlier research was extended by considering: (1) affective variables (e.g., self-concept, locus of control), academic choices (e.g., course selection), and…