Therapists' recall of early sudden gains in routine clinical practice.

This study followed up one by Stiles et al. (2003), which identified sudden gains -- large reductions from one session to the next on a short form of clinical outcomes in routine evaluation outcome measure (CORE-SF) -- by some clients in routine clinical practice. We interviewed the therapists who had treated sudden gain and non-sudden gain clients. Results showed that therapists could retrospectively identify which clients had or had not experienced sudden CORE-SF gains at substantially better than chance rates, although they identified only about half of the clients who had experienced such gains.