The Experience Sampling Method was employed to collect data from a sam
ple of 35 sixth-form college students over a period of one week. This
methodology involved the subjects answering questions printed in a dia
ry on receipt of signals from a pre-programmed watch. They also comple
ted a package of questionnaires related to psychological well-being. T
he aim of the study was to investigate whether the experience of situa
tions where high challenge is matched by skill (termed 'flow') can be
classed as 'optimal experience'. The results showed that the positive
poles of subjective experience tended to cluster in 'control' (skills
exceeding moderate challenge) rather than flow. However, more optimal
experience (considered as high enjoyment) occurred in flow than expect
ed. In addition, optimal experience in flow was characterized by high
cognitive involvement. Subjects who experienced flow as optimal experi
ence were found to score significantly higher on measures of psycholog
ical well-being than those who did not experience flow as highly enjoy
able. The implications are discussed with respect to college students'
quality of life and educational experiences.