One strength of the SLT is that it has highly controlled research support. For example, in Bandura's Bobo doll study, children were matched into pairs, ensuring an equal number of aggressive and non-aggressive children in each group. The study found that children who observed aggressive behaviours were more likely to imitate it when given the chance to interact with a doll. This demonstrates control for individual differences and supports the idea that children learn through observation and imitation. Therefore, Bandura's study increases the credibility of the SLT.