Infants 5-34 weeks of age were observed in their homes playing with their mothers as part of a longitudinal study. Two mother-infant dyads were observed once per week for twelve weeks, during a ten-minute play session. The purpose of the observation system is to describe contingencies leading to the development of attention-seeking behaviors in typically developing infants. Observations were coded using a type-based format (person engagement, object engagement, supported joint engagement, coordinated joint engagement, and unengaged). Child eye gaze, reaching, and grabbing were coded as well as all child and adult vocalizations. It is suggested that the data from the observation system will help inform and assess the effectiveness of infant and toddler social interventions in autism spectrum disorders and advance our understanding of attention seeking behaviors.

As more toddlers are being diagnosed with autism there is an increased need for very early intervention. Preliminary research on interventions suggests toddlers can make important developmental progress and that parents can be part of the intervention process. The purpose of this study was to systematically replicate a parent training program reported by Alai-Rosales et al. (2009). Specifically, the present study taught parents a set of teaching strategies that included arranging the environment, setting up learning opportunities, and using positive reinforcement. Baseline-intervention conditions were replicated across four parent-toddler dyads in order to assess the effects of training on parent and child behaviors. Results indicated increases in parent teaching behaviors, the child targeted behavior (facial orientation), as well as a non-targeted skill, joint attention. Findings are discussed in relation to the challenges of intervention and considerations for future research.

A longitudinal study of infants and their mothers was conducted to explore the development of imitation and approximations to imitation. During a 10-minute unstructured play session, researchers observed two mother-infant dyads once per week for twelve weeks, while they played at home. The data presented represents infants between the ages 5 and 34 weeks. The methodology employed was based on the methods described by Hart and Rilsey (1999). Observations were coded based on the topography of the mother's and infant's behavior and included vocalizations, facial movements, motor movements, and object manipulation. The data are analyzed and discussed in terms of its relevance to autism intervention.

Early and intensive behavioral intervention outcome research includes descriptions of intervention variables that may increase treatment success. This study was designed to develop an observation system that incorporates and expands on some of these variables. Measures include the number of interventionist teaching units, types of skills addressed during instruction, consequences programmed by interventionists, and engagement with teaching materials. This system allowed for a view of the differences in teaching behaviors among the participants. It is proposed that this observation system is a start toward standardized intervention measures that can be applied to evaluate varied treatment models. Such standardization can help in ensuring that all children have access to evidence-based services.

Training siblings as change agents for children diagnosed with autism spectrum disorders (ASD) has been shown to be beneficial in teaching a sibling to teach their brother or sister. There are very few interventions, however, that explore the range of effects that targeting particular skills has on sibling interactions. The purpose of this study was to assess the direct and collateral effects of training behavioral teaching techniques to a typically developing sibling. Four experimental conditions were assessed: baseline, sibling teaching toy play, baseline, and sibling teaching social play. Across all conditions, measures of teaching components and siblings' interactions were assessed. Results of the assessment showed that the sibling was an effective change agent and that more favorable interaction and engagement occurred when social play skills were taught. The results of this sibling intervention and guidelines for condition changes are discussed in terms of sibling relationships.

The UNT Graduate Bulletin includes information about class offerings as well as "policies, regulations, procedures and fees in effect at the time [the] publication went to press" (p. 1). Campus maps are on pages 518 and 520; index starts on page 490.

The UNT Undergraduate Bulletin includes information about class offerings as well as "policies, regulations, procedures and fees in effect at the time [the] publication went to press" (p. 1). Campus maps are on pages 582 and 584; index starts on page 552.