Sandy had learned that if her mother was smiling at her when she came into the kitchen, it meant that Sandy would probably be given a treat to eat if she asked nicely. But if her mother was frowning, she would not give Sandy anything and instead would shoo her away. Sandys mothers facial expression was serving as a a

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     negative reinforcer.
      conditioned stimulus.
      positive reinforcer.
      discriminative stimulus.
asked May 17, 2013 in Psychology by anonymous
    

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discriminative stimulus.
answered May 18, 2013 by ProAnswers ~Top Expert~ (7,505 points)

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