Many individuals with autism spectrum disorder do not demonstrate observational learning (OL), a skill that aids in learning during group instruction. Few studies have evaluated strategies for teaching individuals to engage in OL, and none have evaluated the effects of such strategies on individuals' learning during group instruction. In this study, OL during group instruction was evaluated using a within-participant multiple probe design across motor, object-motor, and vocal modalities and using a concurrent multiple probe design across participants. Interventions included consequence discrimination training and differential observing response training consisting of differential reinforcement and rule statements following errors. Training sessions were conducted with one student participant and one adult participant acting as a confederate student. Group Observation Sessions were conducted with two or three student participants and one adult participant acting as a confederate student. Data were collected on primary dependent variables during Test Sessions conducted with each student participant shortly following Group Observation Sessions. Following training, two of three participants demonstrated improvements in OL across modalities during Test Sessions. Interobserver agreement during all sessions was 90% or higher. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://bibliotheek.ehb.be:2222/en-US/products/dissertations/individuals.shtml.]