The findings of Bandura's study show how much impact the environment of a child can have on their behaviour, since they will learn and imitate those that are shown by, for example, their siblings or parents. Therefore, behaviourism theories like SLT are useful in explaining how behaviour is learned. However, it's also important to consider the biological role in a child's behaviour, since certain biochemical compositions such as testosterone levels, can change the effects of models and the mood of individuals.