Using backward chaining and a physical guidance delay to teach self-feeding

A Comparison of Baseline Procedures in Task Analyses

Several methods for assessing baseline performance in chained tasks have been outlined in the literature, including the fixed-opportunity probe (FOP) and the multiple-opportunity probe (MOP). Concerns have been raised regarding how each of these methods might change the baseline performance of a task, affecting the interpretation of experimental control. The purpose of the current study was to conduct a within-subject comparison of both the FOP and MOP procedures for children with autism performing daily living and self-care skills. Results indicated that, for most participants, the MOP resulted in elevated performance during baseline compared to the FOP, and that for some participants the MOP resulted in acquisition prior to direct training. Because of the possibility that the FOP might result in suppressed baseline performance, it is recommended that in most cases clinicians and researchers use the MOP when assessing baseline performance in chained tasks in order to obtain the most accurate data.

An evaluation of negative reinforcement to increase self-feeding and self-drinking for children with feeding disorders

Self-feeding with utensils represents an important step in a child's progression toward age-typical eating and emerges in the absence of intervention for most children. In contrast, children with feeding disorders may lack the skill or motivation to self-feed, which impedes progress toward age-typical eating. In the current study, experimenters used a multielement design to evaluate negative reinforcement in the form of meal termination to transition six participants with a feeding disorder from caregiver-fed to self-fed bites and drinks. Caregivers conducted meals in which they fed the participant or prompted them to self-feed. During self-fed meal-termination sessions, participants had the opportunity to end the meal contingent on self-feeding the presented bite(s) or drink(s). Self-feeding increased during meal-termination sessions for all participants. The experimenters discuss these results relative to their potential to inform interventions for children with feeding disorders that progress the child toward age-typical eating.