This paper provides a brief overview of a five-year long evaluation pr
oject involving psychology and police training. In the 1980s the Londo
n Metropolitan Police made substantial changes to the initial training
course that new recruits receive. Assessments of the effectiveness of
this training (as revealed by extant and specially designed questionn
aires, by observations of police behaviour, by interviews with members
of the public who had interacted with police officers, and by complai
nts data) are reported. The on-going evaluation provided feedback and
guidance (some was positive, some was negative) to the police force, w
hich acted upon all the recommendations made.