Evaluating Theories of Crime
Evaluating Theories of Crime
What is a “Theory?”
A statement of set of statements about the relationships between 2 or more events
In criminology?
A theory predicts what will happen, not how the world should be
How do you know a “good theory” when you see one?
Akers’ 6 criteria for evaluating a theory
1. Logical Consistency
2. Scope
3. Parsimony
4. Testability
5. Fit with Empirical Evidence
6. Usefulness of Policy Implications
Logical Consistency
Clearly Defined Concepts
Concept = symbol/label that we apply to an abstract image
Examples?
Concepts must fit in a logical manner
BAD LOGIC: All crime is caused by imprisonment
SCOPE (not the mouthwash)
DEPENDENT variable
How “general” is your explanation?
Specific forms of crime/deviance?
All crime?
All crime, deviance, sin, and recklessness?
All else being equal, “Wider is Better”
Parsimony
INDEPENDENT (predictor) variables
How complex is your explanation?
Parsimony: Low self-control is single cause of crime
Not: Crime caused by a combination of poverty, inequality, average daily temperature, intelligence, hair color, weight, daily stress…
All else being equal, more parsimony is better!
Testability
A valid theory can be falsified
Non-falsifiable theories?
Tautological arguments (crime causes crime)
Vague and open-ended statements (Freud)
Must be observe/measure concepts (little green men)
Is the theory correct?
Survive empirical scrutiny
Few theories are entirely correct or false
To what degree is the theory supported?
Preponderance of evidence support?
Incorrect theories must be modified or discarded
Policy Implication
All crime theories attempt to identify the “causes” of crime.
Can the causes be reversed?
Does the theory translate into practice?
Example: Marxist theory of crime
Flow Chart for Evaluation
Testability
Logical Consistency? ( No ( Throw out theory
( Yes ( Empirical Evidence Support? ( No (Stop here)
( Yes
Evaluate:
Scope
Parsimony
Policy Imp.
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