Biological and Biosocial Criminology

The study of how biological characteristics and processes may contribute to variation in criminal or antisocial behavior.

An approach examining how biological characteristics interact with social, developmental, and environmental influences on behavior.

Biological determinism treats behavior as biologically fixed, whereas modern biosocial theory examines probabilistic interactions among multiple influences.

William Sheldon.

Endomorph, mesomorph, and ectomorph.

A body type characterized by relatively rounded or soft physical features.

A body type characterized by relatively muscular and sturdy physical development.

A body type characterized by relatively slender and linear physical development.

Mesomorphy, although body type is not a reliable basis for predicting individual criminal behavior.

Ernst Kretschmer.

They rely on oversimplified physical classifications, suffer from methodological weaknesses, and cannot establish criminality from appearance.

His statistical study challenged the existence of a distinct physical criminal type, although aspects of his own work also had limitations.

It examined patterns of poverty and offending across generations but could not reliably separate hereditary influences from environmental conditions.

They frequently confused shared genetics with shared poverty, upbringing, social disadvantage, and other environmental factors.

The scientific study of genetic and environmental contributions to differences in behavior.

A population-specific statistical estimate of the proportion of observed variation in a trait attributable to genetic differences under particular conditions.

No. Heritability describes variation within a population, not the genetic percentage of an individual's behavior.

To compare similarities among twins with different degrees of genetic relatedness to investigate genetic and environmental influences.

They originate from one fertilized egg and generally share nearly all their inherited nuclear DNA.

They share approximately 50% of their segregating genetic variants, like ordinary full siblings.

A possible genetic contribution, subject to assumptions about shared environments and other study limitations.

The assumption that environmental influences relevant to the studied trait are comparably shared by monozygotic and dizygotic twins.

To examine associations between biological family characteristics, adoptive environments, and later behavioral outcomes.

A process in which the effect of genetic variation depends on environmental conditions or environmental effects depend on genetic characteristics.

A relationship in which genetic characteristics are associated with exposure to particular environments.

A situation in which biological parents provide both genetic characteristics and a related home environment to their children.

A situation in which an individual's genetically influenced characteristics elicit responses from other people.

A situation in which individuals select or create environments partly associated with their genetically influenced characteristics.

A characteristic influenced by many genetic variants, often together with environmental factors.

Criminal behavior is a complex social and behavioral outcome influenced by many interacting factors rather than one determinative gene.

The study of relationships between brain structure, brain function, neurodevelopment, and antisocial or criminal behavior.

Executive functions such as planning, inhibition, decision-making, and regulation of behavior.

Processing emotionally significant information, including threat-related learning and responses.

A group of cognitive processes involved in planning, working memory, flexible thinking, inhibition, and goal-directed behavior.

The ability to suppress or regulate an immediate response in favor of a more appropriate action.

A tendency toward rapid or insufficiently considered actions, sometimes involving difficulty delaying gratification or evaluating consequences.

Impulsivity is a behavioral tendency, while criminal intent is a legal or mental-state concept assessed in relation to a particular offense.

Serotonin participates in several regulatory processes, including mood and impulse regulation, but its relationship to aggression is complex.

Dopamine contributes to motivation, reward learning, movement, and other functions that may influence behavior.

No. Neurotransmitter measures cannot reliably determine individual criminal behavior.

Some studies find context-dependent associations, but testosterone does not directly or inevitably cause violent or criminal behavior.

A neuroendocrine system involved in coordinating physiological responses to stress.

A glucocorticoid hormone involved in stress responses, metabolism, and regulation of several physiological processes.

Relatively stable individual differences in emotional reactivity, activity, attention, and self-regulation that emerge early in development.

Temperament refers to early-emerging behavioral tendencies, while personality encompasses broader patterns of thoughts, feelings, and behavior shaped over development.

A characteristic or circumstance statistically associated with an increased probability of later antisocial behavior.

A characteristic or circumstance associated with reduced risk or greater resilience despite exposure to adversity.

They are probabilistic associations, and many children with risk factors never engage in serious offending.

Behavioral outcomes may differ because genetic influences operate alongside distinct environmental experiences.

Brain imaging cannot establish that a particular person committed a specific criminal act.

The variant may be statistically associated with aggression in the studied population, but causation, individual prediction, and generalizability remain separate questions.