Objective: Patient-reported outcomes data reveal differences both in therapists' global
effectiveness across their average patient (between-therapist effect) and in treating different …

Significant therapist variability has been demonstrated in both psychotherapy outcomes and
process (eg, the working alliance). In an attempt to provide prevalence estimates of …

This chapter focuses on relatively new empirical efforts to address four" big questions". It
reviews research that addresses the question of whether, in addition to differing in their …

Objective: Differences between therapists (therapist effect) are often larger than differences
between treatments (treatment effect) in explaining client outcomes, and thus should be …

As established in several studies, therapists differ in effectiveness. A vital research task now
is to understand what characterizes more or less effective therapists, and investigate …

Objective: Empirical findings on self-serving biases amongst psychotherapists are
inconsistent. We tested in a large naturalistic data set, if therapists are prone to illusory …

Objective: Therapist effectiveness has primarily been defined as being the aggregate of the
client therapy outcomes within a therapist's caseload. It may seem intuitive that the most …

Objective: Although higher quality patient–therapist alliance and more positive patient
outcome expectation (OE) consistently predict symptomatic/functional improvement in …

This study examined data collected on over 5,000 clients seen by 71 therapists over a 6‐
year period in a University Counseling Center. Clients were given the Outcome …

Recent evidence suggests that psychotherapists may not increase in effectiveness over
accrued experience in naturalistic settings, even settings that provide access to patients' …