New Search

1. Client Language Assessment Proximal/Distal (CLA-PD)

Year: 2011

Magill, Molly; Apodaca, Timothy R.; Karno, Mitchell; Gaume, Jacques; Durst, Ayla; Walthers, Justin; Stout, Robert L.; DiClemente, Carlo

The Client Language Assessment Proximal/Distal (CLA-PD) is a communication rating system for measuring client decision-making in interventions that target a specified behavior change. "Distal" language refers to verbalized decision-making that may have a direct effect on behavior change (e.g., alcohol or other drug use), while "proximal" language refers to decisions about indirect effects (coping activities or life-style changes that are prescribed to facilitated change, like attending a self-help meeting or asking for support from a significant other). The scale uses five dimensions of change language (Reason, Ability, Commitment, Taking Steps, Other) adapated from the Motivational Interviewing Skill Code (MISC).

Instrument Use & Availability

The CLA-PD manual and measure can be obtained by contacting the first author, Molly Magill (

For more information, contact:
Molly Magill, PhD
Center for Alcohol and Addiction Studies
Brown University
Box G-S121-5
Providence, RI 02912
tel: 401-863-6557

Permanent URL for this page:

Instrument Details:

Source Reference:Magill M, Apodaca TR. Client Language Assessment for Proximal and Distal Targeted Behavior Change (CLA-PD). (Unpublished Manual, 2011)
Population studied:Adults
Instrument Type:Assessment
Validity/Reliability:The CLA-PD offers sound reliability and validity while offering a level of detail that may result in a more nuanced understanding of treatment-facilitated behavior change (Magill M et al, 2016).

Supporting References:

  • Magill M et al. Reliability and validity of an observational measure of client decision-making: the Client Language Assessment - Proximal/Distal (CLA-PD). J Subst Abuse Treat 2016;63:10-7. doi: 10.1016/j.jsat.2015.12.006

New Search