The Premack principle states that any Response A can reinforce any other Response B if the independent rate of A is greater than the independent rate of B (Premack, 1959). Applying the Premack principle involves arranging the environment to restrict access to certain responses based on relative probabilities of a set of given responses (Timberlake…

This dissertation is comprised of three studies using restricted data from the ECLS-K:1998 to address the questions who is placed in special education? and what happens after they are placed? Though these questions have been extensively studied, existing research has largely ignored the intersection of longitudinal developmental pathways and…

In an effort to improve academic performance for students receiving special education services, a large urban school district in Tennessee has implemented Integrated Service Delivery Model. The purpose of this study was to compare the performance of students receiving instruction in self-contained classrooms to the performance of students…

Guided by Bioecological Systems Theory and Schema Theory, I investigated mothers' perceptions regarding the emotional development of their preschool children. Researchers acknowledge mothers' contributing role in influencing children's behavioral displays of emotion, but there is a dearth in the literature on mothers. emotion-related behaviors,…