Lewis et al. analysed data from 500 youths and found maternal deprivation a poor predictor of later criminality as well as the ability to form close relationships in adolescence
Another weakness is that it lacks falsifiability (not testable) where many unconscious concepts within Freudian theory mean application to crime not open to empirical testing
The absence of supporting evidence creates arguments such as the inadequate superego, and this can only be judged on their face validity rather than scientific worth