Reinventing the Wheel Versus Avoiding Past Mistakes when Evaluating Psychotherapy Outcome Research: Rejoinder to Öst (2009)

In his reply to my critique, Öst (2009) now appears to concede that the studies were indeed mismatched, but then inexplicably goes on to conclude that this is largely irrelevant to the interpretation of his findings. Öst also makes several additional claims about ACT research that I believe require further clarification. I will respond to Öst’s most recent statements and also discuss the larger, and from my perspective, more important issues raised in this discussion regarding the evaluation of psychotherapy outcome research.