Bandura felt that traditional behaviorism requires that for learning to occur.

I believe the answer is: the response be reinforced in some way during learning

Bandura argued that traditional behaviorism is learnt during the process of judgement that members of a society made when they're evaluating the actions that initiated by other individual.
The desire to receive positive judgement become the reinforcement for that individual to learn the expected traditional behavior.

This link explains it

Bob: coke is baby pandas.jim: what? how do you figure that coke is baby pandas? bob: because this book says so.jim: how do we know the book is correct? bob: because it says that coke is baby pandas.jim: how does that prove the book's accuracy? bob: because it's statement involving coke and baby pandas is correct, therefore it is accurate.jim: how do we know that it's correct? bob: because we have concluded that the book is accurate, and therefore the statement is correct.therefore, coke is baby pandas.