Based on the analysis of available research on students' alternative conceptions about the particulate nature of matter, we identified basic implicit assumptions that seem to constrain students' ideas and reasoning on this topic at various learning stages. Although many of these assumptions are interrelated, some of them seem to change or…

Psychologists have long been interested in the causes of student success or failure in college. In the late 1950's, investigators began to examine behaviors beyond the cognitive realm as crucial elements in the student's adaptation to college life. Research on adolescents' transition from high school to college identified several components of…