The performance of 19 BBC-TV production teams was examined over an 18-
month period, using audience appreciation ratings and managers' assess
ments of performance. Alternative models were tested to account for va
riations in team effectiveness and team member mental health. Reflexiv
ity-the extent to which the team reflects on and modifies its function
ing-best predicted team effectiveness, whereas climate for innovation
predicted ream member mental health. Larger teams (over 10 members) te
nded to have poorer climates for innovation and poorer team member men
tal health.