How to Build the Right Assessment Battery for Your Practice

You're convinced that routine outcome measurement is worth doing. You've read the evidence. You're ready to start. And then you face the practical question: which instruments should I actually use?

There are hundreds of validated psychological measures. Choosing the right combination for your specific practice, one that's clinically informative without being burdensome, requires some strategic thinking.

Principles for Choosing Instruments

1. Match Your Caseload

The most important factor is what your patients actually present with. A practice that sees primarily depression and anxiety has different assessment needs than one specializing in eating disorders or child behavioral problems.

Start by listing your five most common presenting problems. For each one, identify the gold-standard screening instrument. That's your starting battery.

2. Balance Breadth and Depth

You need at least one broad measure (to catch problems you weren't looking for) and condition-specific measures (to track your primary treatment targets with precision).

Broad measures like the CORE-OM, DASS-21, or WHO-5 cast a wide net. They detect distress across multiple dimensions and catch comorbidities you might not have assessed.

Specific measures like the PHQ-9, GAD-7, AUDIT, or EAT-26 provide detailed severity assessment and sensitive treatment monitoring for particular conditions.

3. Minimize Patient Burden

Every additional questionnaire costs patient time and goodwill. The sweet spot for most practices is 3–5 minutes of total assessment time per session, roughly 10–15 items for session-by-session monitoring, with longer batteries reserved for intake and periodic review.

The fastest way to lose patient cooperation is to hand them 45 minutes of questionnaires every week. Be strategic about what you measure and when.

4. Ensure Every Measure Changes What You Do

If a measure wouldn't change your clinical behavior regardless of the result, don't administer it. Every instrument should have a clear "if score is X, then I would Y" logic.

Recommended Batteries by Practice Type

General Adult Mental Health Practice

Core battery (every session, ~3 minutes):

• PHQ-9 (depression, 9 items)
• GAD-7 (anxiety, 7 items)

Intake and periodic review (add ~5 minutes):

• WHO-5 (wellbeing, 5 items) or DASS-21 (depression, anxiety, stress; 21 items)
• AUDIT (alcohol, 10 items)
• PHQ-15 (somatic symptoms, 15 items)

As indicated:

• CUDIT-R if cannabis use is reported
• ASRS if ADHD is suspected
• EAT-26 if eating concerns emerge
• BSL-23 if borderline features are present

This approach gives you session-by-session tracking of the two most common presentations, with periodic thorough screening to catch comorbidities.

Depression-Focused Practice

Core battery:

• PHQ-9 (every session)
• WHO-5 (every session, captures positive wellbeing, which the PHQ-9 misses)

Periodic:

• GAD-7 (every 2–4 sessions, since anxiety comorbidity is the rule, not the exception)
• AUDIT (every 1–3 months)

Anxiety-Focused Practice

Core battery:

• GAD-7 (every session)
• PHQ-9 (every session, since depression comorbidity is extremely common)

Periodic:

• DASS-21 (quarterly, as the stress subscale captures tension and agitation that the GAD-7 may miss)

Child and Adolescent Practice

Core battery:

• SDQ parent version (intake and periodic review)
• SDQ self-report (ages 11+, intake and periodic review)
• SDQ teacher version (with consent, at intake and mid-treatment)

As indicated:

• PHQ-9 adolescent version if depression is primary
• ASRS if ADHD is suspected

Practice Specializing in Personality Disorders

Core battery:

• BSL-23 (weekly for BPD)
• CORE-OM (intake, periodic review, discharge)

Supplementary:

• PHQ-9 and GAD-7 (every 2–4 sessions, since mood and anxiety comorbidity is nearly universal)

Structuring the Assessment Schedule

Not every instrument needs to be administered at every session. A tiered approach reduces burden while maintaining complete coverage:

Tier 1: Every session (2–3 minutes). Your primary outcome measures. Usually 2 condition-specific instruments (e.g., PHQ-9 + GAD-7).

Tier 2: Every 4–6 sessions (additional 3–5 minutes). Broader measures and comorbidity screening. Instruments like the DASS-21, WHO-5, or AUDIT.

Tier 3: Intake, mid-treatment, and discharge (additional 10–15 minutes). Full batteries. This is where you deploy longer instruments, risk assessments, and condition-specific screeners for comorbidities.

Common Mistakes

Too many instruments, too often. Assessment fatigue is real. If patients start rushing through questionnaires to get them done, the data quality drops. Better to measure fewer things well than many things poorly.

Only measuring the presenting problem. Comorbidity is the rule in mental health. If you only screen for what the patient tells you about, you'll miss the alcohol use, the eating disorder, or the undiagnosed ADHD that's undermining treatment.

No clear action plan for scores. If you don't have a protocol for what to do when a score crosses a threshold (what score triggers a safety assessment? what score triggers treatment review? what score indicates readiness for discharge?), the measurement is just documentation, not clinical decision support.

Inconsistent administration. Sporadic measurement is worse than no measurement. It creates the illusion of monitoring without the reality. Pick a schedule and stick to it.

Not reviewing results with patients. Assessment without feedback is data collection. Assessment with feedback is measurement-based care. The clinical value is in the conversation.

Building the Habit

The biggest barrier to routine assessment isn't choosing the instruments. It's building the habit of using them consistently. Start small:

1. Choose one instrument for one patient group
2. Administer it at every session for one month
3. Review every score before the session starts
4. Mention the score to the patient in the first two minutes
5. Expand to additional instruments and patients once the habit is established

Once outcome measurement becomes automatic rather than optional, you'll have a hard time imagining practice without it.