Biological and psychological theories of juvenile delinquency This can describe a wide variety of issues dealing with biological and psychological theories of juvenile delinquency. This can describe a wide variety of issues dealing with biological and psychological theories of juvenile delinquency. This can describe a wide variety of issues dealing with biological and psychological theories of juvenile delinquency. This can describe a wide variety of issues dealing with biological and psychological theories of juvenile delinquency. This can describe a wide variety of issues dealing with biological and psychological theories of juvenile delinquency. This can describe a wide variety of issues dealing with biological and psychological theories of juvenile delinquency.