Suggestologist said:
And Wagg seems to have a current textbook that includes DeShazer, so I'd like to see what your book says about the evidence for DeShazer's specific approach, Jeff Wagg. And perhaps the narrative-type as well. I may or may not add-to and/or comment.
The book is
Theory and Practice of Counseling & Psychotherapy (7th Edition) by Gerald Corey, who appears to have way too much power in this field.
It lumps Solution Focused Brief Therapy together with Narrative Therapy in a chapter called "Post Modern Approaches," which is significant because every other chapter refers to a theory rather than an approach. It also says that the SFBT people aren't therapists, they are consultants or conversationalists.
I apologize for the length of this.
It says nothing about evidence, save a figure from DeShazer where he says that 91% of his clients have met their goals in about five visits. To be fair, there is very little evidence for any theory or approach.
It says about the post modern approaches:
There are multiple realities and truths. There is no external reality. People create meaning through conversations with others. There is no pathology, diagnosis, or searching for the root of a problem.
Therapy tends to be brief. The person is not the problem; the problem is the problem. The emphasis is on externalizing the problem and looking for exceptions. Therapy is a collaborative dialogue where client and therapist work to co-create solutions. By indentifying instances when the problem did not exist, clients can create new meanings for themselves and fashion a new life story.
Therapists take an active role in challenging social and cultural injustices that lead to oppression of certain groups.
Clients want to talk about their problems, but may be put off by talking about just exceptions. Clients may wish the therapist to be an expert, or be put off by a therapist who is not an expert.
De Shazer suggests that there is no relationship between problem and solution. Therapy is goal driven, and employs rating scales to determine effectiveness. De Shazer asks "If a miracle happened and the problem you have was solved overnight, how would you know it was solved, and what would be different?"
Brevity is the main appeal of SFBT which places a premium on short-term therapy.
I looked, but I couldn't find anything that mentioned an XOR type of situation, or playing with words. This is just an introductory text however.