Smith et al used a field experiment where 18 coaches were randomly allocated to the CET and 16 acted as controls. The CET was an evening training session which stressed the importance of reinforcement, encouragement and modelling. Behavioural feedback were given to these coaches using a Coaching Behaviour Assessment System (CBAS) for the first 2 weeks of the season. Coaches also completed a self monitoring form to indicate what percentage of the time they used the techniques and 325 players were interviewed about their coach, attitudes to baseball and self esteem.