EAB 3764 Lecture Notes - Lecture 11: Backward Chaining, Forward Chaining, Task Analysis

• School: University of Florida
• Department: Experimental Analysis of Behavior
• Course: EAB 3764
• Professor: Iwata Brian

Document Summary

Unlike shaping (change in response form), chaining involves a sequence of separate responses. Definition: a sequence of rs functionally linked to the same terminal reinforcer. Eo + sd r1 r2 r3 r4 (terminal r) sr. Dual function of responses: conditioned reinforcer (sr) for a previous r, discriminative stimulus (sd) for a later r. Instructions begin with the first line; subsequent links are added form the beginning (front) to the end(back) of the chain. Advantage: retains temporal order of performance. Disadvantage: learned later responses go unnoticed. Instructions begin with the last link; subsequent links are added form the back to the front of the chain. Advantage: sr always follows completion of the terminal link. Total task presentation: entire chain is taught simultaneously, with assistance (graduated guidance) provided as needed. Wacker, berg, berrir, & swatta (1985) forward chaining reaction. General focus: to evaluate further the use of picture-prompts in building complex behavioral chains.