APPLYING THERBLIGS TO TASK ANALYTIC INSTRUCTION - A TECHNOLOGY TO PURSUE

Two task analytic instructional procedures, a traditional strategy and a therblig-based strategy, were investigated to compare the efficacy and efficiency of both procedures to teach vocational skills to three adults with severe disabilities. The skills taught were using a photoc opier and folding machine. Efficacy of both procedures was determined by the acquisition and short-term maintenance of the skills. Efficienc y was evaluated as trials, instructional time, and errors to criterion . The two task analytic strategies were compared using an alternating treatment design with replications across participants. Results indica ted that both strategies led to the acquisition of the target tasks. H owever, some support was found for the therblig-based strategy being m ore efficient and efficacious than the traditional strategy.