This study illustrates how assertion training effects can be assessed comprehensively within a single-case design. An underassertive female undergraduate client received 5 weekly training sessions. Measures consisted of a personality inventory, a self-rating scale, and video tapes of role playing. All were brief and unobtrusive. Simple prerequisites for assertiveness improved first, followed by improvements in increasingly more complex areas of functioning. It is both feasible and profitable to use comprehensive assessment procedures in single-case studies.
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