Improving program outcome with process-based performance feedback

Two studies, using an across participants multiple baseline design, assessed effects of different amounts of process and outcome performance feedback on instructor and child behavior in an early intervention program. Seven instructors, mostly university students, and one child with autism were observed over a 4 month period on measures of instructors' verbal instructions, prompts, and consequences, and correct child behavior. In Study 1, performance feedback contained verbal, written, and graphic information on instructor (process) and child (outcome) behavior, whereas in Study 2, only verbal process information was provided. Results show that both feedback procedures were equally effective in increasing correct instructor performance and correct child behavior. Conclusions are (a) that verbal process feedback alone was as effective as an extensive process plus outcome feedback, but easier to use and more efficient, and (b) that measures of performance error proved useful in detecting feedback effects on instructor behaviors that varied across time and program changes.