Observational learning, in which we learn by watching and imitating others, was proposed by:

1. Skinner and Watson were strict behaviourists who explained learning through direct consequences and observable stimulus-response links. 2. Thorndike contributed the law of effect, which underpins operant conditioning. 3. Bandura proposed social learning theory, arguing that internal mental states matter and that learning can occur without external reinforcement. 4. Observational learning, learning by watching a model, is therefore Bandura's contribution. _Source: OpenStax Psychology (1st ed., CC BY 4.0), Ch 6 "Learning", §6.4 Observational Learning (Modeling)_