Reductionist = only considers one possibility for the explanation
Holistic = considers a number of factors as the explanation
Deterministic = says everyone with this or born like this will become a criminal
Environmental factors = family background, housing, poverty, etc
Sample bias = if the studies are just of convicted criminals they're not representative.
Gender bias = most research just focuses on biological men therefore it cannot necessarily explain female criminality
Crime is a social construct = if crime varies over time/place etc, then how can we look for a universal explanation
Diathesis-stress model = a combination of biological and environmental factors