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A child with a phonological disorder typically produces "sack" as /kak/. During an intervention session, the child produces /tak/ and is rewarded for it by the SLP. The situation described illustrates a therapeutic strategy that isA. based on behavior modification principles and distributed practiceB. based on sound behavioral principles, since it involves application of a random reinforcement scheduleC. Based on the theory of negative practice, which permits occasional reinforcement of incorrect responses to prevent discouragementD. Based on the gradualness principle, since the SLP reinforces a response that involves stopping on the initial consonant, a successive approximation of the targetE. A misapplication of variable reinforcement, since the SLP erroneously reinforces a production lacking the essential feature of stridency.

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