A pronounced improvement has occurred in client behavior, but the ultimate goals have not yet been ...

A pronounced improvement has occurred in client behavior, but the ultimate goals have not yet been achieved. In such a case, a single-system design has demonstrated that the intervention is
 
  a. statistically effective.
  b. therapeutically effective.
  c. experimentally effective.
  d. substantively effective.

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Which of the following is identified as an important condition to be met when using observation as the method of data collection in single-system research?
 
  a. Only one observer should be used to avoid confusion.
  b. The observer should be alerted to when intervention or treatment begins inorder to assure that subtle changes are noticed
 c. The observation should be unobtrusive.
  d. All of the answers represent such important conditions.

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Single-system designs typically rely on measures of all but which of the following for a baseline?
 
  a. The duration of a client behavior
  b. Behavior frequency.
  c. The intensity of a behavior.
  d. A single standardized test score.