A child psychiatrist examines the effects of a drug (Ritalin) on his young client’s impulsive behaviors (e.g., getting out of his seat during meals, blurting out inappropriate comments). He has the child’s parents observe and record these behaviors at home for several days before prescribing the medication. They report high levels of these behaviors each day. He then has the parents give the child the medication for a few weeks while they continue to observe and record these behaviors. They report a decrease in these behaviors. The psychiatrist then asks the parents to discontinue the use of the medication for several days, during which they observe an increase in these behaviors. Finally, he has the parents begin giving their child the medication again, and they again observe a decrease in these behaviors. The experimental design is: A)multiple baseline B)multielement C)reversal D)changing criterion
A child psychiatrist examines the effects of a drug (Ritalin) on his young client’s impulsive behaviors (e.g., getting out of his seat during meals, blurting out inappropriate comments). He has the child’s parents observe and record these behaviors at home for several days before prescribing the medication. They report high levels of these behaviors each day. He then has the parents give the child the medication for a few weeks while they continue to observe and record these behaviors. They report a decrease in these behaviors. The psychiatrist then asks the parents to discontinue the use of the medication for several days, during which they observe an increase in these behaviors. Finally, he has the parents begin giving their child the medication again, and they again observe a decrease in these behaviors.
The experimental design is:
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