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. Author manuscript; available in PMC: 2010 Sep 17.
Published in final edited form as: Behav Anal. 2009;32(2):285–291. doi: 10.1007/BF03392191

Figure 4.

Figure 4

Rates of responding on a sorting task by two adults with mental retardation (from Mace et al., 1990). Sorting utensils in multiple-schedule components defined by different utensil colors was reinforced according to a VI 1-min schedule (60 reinforcers/hr). In addition, response-independent reinforcers were given according to a VT 30-s schedule (120 reinforcers/hr) in one component. After baseline training (BL), sorting was disrupted by presenting a distractor (MTV). Note that the order of sorting rates for components with and without added VT reinforcers reversed during the tests.