The Therapy Attitudes and Process Questionnaire: A Brief Measure of Factors Related to Psychotherapy Appointment Attendance.

Background: Patient non-attendance and dropout remains problematic in mental health settings. The theory of planned behavior (TPB) has proven useful in understanding such challenges in a variety of healthcare settings, but the absence of an adequate measure in mental health has hampered research in this area.

Objective: The aim of the current study was to develop and conduct an initial psychometric investigation of a brief measure, the Therapy Attitudes and Process Questionnaire (TAP), utilizing the TPB to understand factors associated with attendance in mental health settings.