P: if a neutral stimulus becomes associated with a fearful experience the result should be a phobia, but this doesnt always happen.
E: research found that not everyone who is bitten by a dog develops a phobia of dogs. this could be explained by the diathesis-stress model. this proposes that we inherit a genetic vulnerability for developing mental disorders.
L: this suggests that a dog bite would only lead to a phobia in those people with such vulnerability. therefore, the behavioural explanation is incomplete on its own