Lessons in Risk – Application and Decision-Making | The ARC Lab

Risk vs Needs Assessments

Thu, 28 May 2026 00:00:00 +0000

Module 1 · Risk Needs Tool Lessons

Prediction is not the same as intervention.

Risk assessment and needs assessment are related, but they are not the same thing. One asks how likely an outcome is. The other asks what factors should be targeted for intervention.

Key takeaway

Good prediction does not automatically tell us what to treat.

What Risk Assessment Asks

A risk assessment asks:

The question: How likely is an outcome?

Examples include:

recidivism
violence
failure to appear

These tools are often used to inform:

supervision intensity
classification
release decisions

Illustration

Risk and needs assessments ask different questions

Risk assessment focuses on how likely an outcome is. Needs assessment focuses on what factors should be targeted for intervention.

Some dynamic criminogenic needs can do both, but prediction and intervention are still different tasks.

What Needs Assessment Asks

A needs assessment asks a different question:

The question: What factors should we target for intervention?

Examples include:

substance use
peer associations
employment
antisocial cognition

These tools are used to guide:

treatment planning
programming
case management

Some Factors Do Both

Some factors do both. Dynamic criminogenic needs can:

predict recidivism
serve as intervention targets

That overlap matters, but it does not make prediction and intervention the same thing.

Why This Matters

Prediction is not the same as intervention
Some strong predictors are not easily changeable
Effective correctional practice requires both risk and needs assessment

Bottom Line

Good prediction does not automatically tell us what to treat. Risk assessment helps estimate likelihood; needs assessment helps identify intervention targets.

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Static vs Dynamic Risk Factors

Mon, 01 Jun 2026 00:00:00 +0000

Module 2 · Risk Application

Prediction and intervention are not the same thing.

Not all risk factors are created equal. Some factors are static. Others are dynamic. The distinction matters because prediction and intervention are not the same thing.

Key takeaway

The strongest predictors may not be treatment targets.

Static Risk Factors

Static factors typically do not change over time, or only change in one direction by increasing risk exposure.

Examples include:

criminal history
age at first arrest
gender
early life adversity

These factors are often strong predictors of recidivism. But they are not direct intervention targets.

The idea: Some factors predict risk but are not easily changeable.

Illustration

Static and dynamic factors serve different purposes

Static factors are often strong predictors, but dynamic factors are the main targets for intervention.

Prediction and intervention are related, but they are not the same task.

Dynamic Risk Factors

Dynamic factors can change over time.

Examples include:

substance use
employment and education
peer associations
criminal thinking patterns
family relationships

These factors help explain changes in risk and provide targets for intervention.

Why This Matters

Strong prediction does not automatically identify treatment needs
Dynamic factors are the focus of programming and supervision targets
Effective practice requires understanding both static and dynamic factors

Risk Assessment and Needs Assessment

Most risk assessments include both static and dynamic factors.

Needs assessments focus exclusively on dynamic criminogenic needs because they are changeable intervention targets.

Bottom Line

The strongest predictors may not be treatment targets. Effective correctional practice requires understanding both static and dynamic risk factors.

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Criminal History Predicts Risk—But Is It a Need?

Fri, 05 Jun 2026 00:00:00 +0000

Module 3 · Risk Application

Strong predictor does not mean good intervention target.

One of the strongest predictors of future offending is criminal history. That finding has been replicated for decades. But there is an important distinction: strong predictor does not mean good intervention target.

Key takeaway

Criminal history helps estimate risk, but not what to change.

Why Criminal History Predicts Risk

Criminal history is useful because it captures accumulated risk exposure over time. People with more extensive criminal histories reoffend at higher rates.

That makes criminal history very useful for prediction.

The idea: Criminal history predicts risk, but it is commonly measured as a static factor.

Illustration

Predictors are not always needs

Criminal history is a strong predictor of future offending, but it is not something practitioners can directly change through intervention.

Some factors help predict recidivism. Fewer factors also guide intervention.

Why It Is Not a Direct Intervention Target

Criminal history is commonly measured as a static factor. We cannot:

change prior arrests
change prior convictions
change age at first arrest

That makes criminal history much less useful for intervention.

What Can Be Targeted

By contrast, factors such as substance use, peer associations, and criminal thinking patterns may be somewhat less predictive than criminal history alone, but they can change and become targets for intervention.

What Belongs in an Assessment?

Notice the lower-left corner of the figure. Many characteristics can be measured. Very few help predict recidivism or guide intervention.

This is an important lesson in assessment development: just because something can be measured does not mean it belongs in an assessment.

Why This Matters

Prediction and intervention serve different purposes
Strong predictors are not automatically treatment targets
Effective correctional practice requires both risk and needs assessment

Bottom Line

Criminal history helps estimate risk, but not what to change. Strong predictors are not automatically good treatment targets.

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