- A strength of the explanation is that it has supporting evidence from Dick and Beirut, who found heritability of alcohol from family, twin and adoption studies. Other studies also found similar results. This makes the explanation more reliable
- Another strength of the explanation is that personality characteristics associated with abuse such as sensation seeking has also been liked with drugs. This stregthens the validity. However, It could be argued whether personality is a genetic factor- This may decrease the validity of the explanation.
- A weakness is the that the principle of labellling an adolescent as a substance abuser may affect results. This could account for the inconsistency of findings due to self fulfilling, which therefore decreases validity.
- Another weakness…