result in rote responding, reduced generalizability of target behavior, and resurgence of challenging behavior (CB) during treatment lapses. Lag schedules of reinforcement have been successfully used to address these concerns. We applied an increasing lag schedule within FCT to increase the variability and persistence of appropriate responding of four young children with disabilities while maintaining low levels of CB during treatment. Our results provide evidence regarding the effects of lag reinforcement on appropriate communication and CB during treatment and lapses in treatment with children with autism and Down syndrome. This research provides a new perspective to the field given, we assessed functional communication during baseline, assessed generalization to new contexts, and assessed social validity via both masked raters and participants’ mothers. We discuss the implications of this work and provide future directions for researcher and practice.

27:T461,

This study examined the remote learning activities children born very preterm (VPT; gestational age ≤ 30 weeks) received, compared with children born full term (FT; gestational age ≥ 37 weeks), during the COVID-19 pandemic. Parents of 5- to 6-year-olds born VPT (n = 33) and FT (n = 33) reported on the provision, frequency, and duration of teacher-provided live instruction, educational materials, and homework; and parent-provided educational materials. More kindergarten children born VPT received small group instruction and fewer received large group instruction than FT children. Preschoolers born VPT engaged in parent-provided learning apps, educational videos, and reading activities less frequently or for shorter durations than FT children. Findings suggest that while teachers generally implemented remote learning similarly for children born VPT and FT, parents did not. Children born VPT are at higher risk for educational problems and may benefit from more intensive school- and home-based educational interventions to help offset the impact of school closures.

28:T529,

In this study, the relationships between child social functioning, parenting stress, and Part C Early Intervention (EI) enrollment were examined in 227 ethnically and racially diverse, low-income families of 15- to 27-month-old children. All toddlers in the sample were identified with or at high risk for developmental delay via universal screening in primary care; 41.4% were enrolled in EI at the time of study data collection and 83.3% ultimately enrolled in EI before turning 3 years old. Generalized linear mixed model results indicated no direct relationship between EI enrollment and parenting stress, but a significant inverse association was found between child social functioning and parenting stress (β = −0.61, p = .005) that was moderated by EI enrollment (p < .001). This suggests potential benefits of timely referral and access to EI for families of children at risk of developmental delay in historically underserved communities. Furthermore, exploratory bivariate analyses indicated that clinically elevated parenting stress related to higher worry about the child’s development and higher M-CHAT-R/F scores; EI enrollment was related to parents not working outside the home, older age of both parent and child, and lower child social functioning level.

29:T43c,

Parents of children who are newly identified as deaf or hard of hearing (DHH) face many decisions surrounding communication and intervention, including where to receive early intervention (EI) services. This study explored the experiences and perspectives of parents of DHH children enrolled in a center-based, family-centered EI program focused on developing listening and spoken language in California. Seventeen families participated in biannual focus groups following a semi-structured interview protocol that focused on parental decision-making and experiences receiving center-based services. Qualitative thematic analysis was used to code transc