Individuals with autism spectrum disorder (ASD) experience difficulties sharing past experiences. The ability to share past experiences is first developed through joint-reminiscing conversations between caregiver and child. In this study I conducted a secondary analysis of a single-case dataset to evaluate the collateral effects of family photographs and training and coaching in naturalistic developmental behavioral intervention on the parents' joint reminiscing style, types and accuracy of child responses, and total number of utterances spoken by parent and child. Results of this study indicate that utilizing family photographs as visual supports had positive effects on the parent's reminiscing style, the child's memory responses, and the child's ability to correctly answer questions and small effects on average number of utterances for Dyads 1 and 3. Additional increases were observed in these categories after training and coaching in NDBI strategies. In addition, I conducted a second study that investigated the social validity of the intervention as evaluated by the mothers who participated in the first study and early intervention professionals naive to the conditions and goals of the study. All mothers reported spontaneous generalization of the NDBI strategies to other activities or materials after intervention. The intervention components were also, overall, rated favorably by the early intervention professionals. [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://www.proquest.com.bibliotheek.ehb.be/en-US/products/dissertations/individuals.shtml.]