Planning an Outcome Study? How about using a design tests if cognitive change influences outcome?

At this point, we have many studies that show that CBT is effective with a broad range of problems but many fewer studies that examine whether cognitive change has an important influence on outcome. If you're planning an outcome study, it may be possible to use a design that allows inferences about the role of cognitive change in producing change in outcome variables and it may not be much more work than an ordinary outcome study.

I'm not a big-time methodologist but the design used by Burns, et al. (2003) looks good to me:

Burns, J. W., Kubilus, A., Bruhel, S., Harden, N. & Lofland, K. (2003). Do Changes in Cognitive Factors Influence Outcome Following Multidisciplinary Treatment for Chronic Pain? A Cross-Lagged Panel Analysis, Journal of Consulting and Clinical Psychology, 71, 81-91

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