Yes, there is a difference between an alcohol or drug assessment and an evaluation, though the terms are often used interchangeably in casual conversation. Here’s a breakdown:

1. **Assessment**:
- Typically refers to a preliminary process.
- Involves gathering information about an individual's substance use history, behavior, and related issues.
- May include standardized questionnaires or interviews.
- Aims to identify whether there is a substance use problem and the severity of that problem.

2. **Evaluation**:
- Generally a more comprehensive and detailed process.
- Often includes the assessment but goes further to analyze the individual’s needs.
- May involve a clinical diagnosis and recommendations for treatment based on the findings.
- Often required for legal or clinical purposes, providing a report that may be used in court.

In summary, an assessment is usually the first step, while an evaluation is more in-depth and may result in a formal diagnosis and treatment plan.