Berlyne's theory of aesthetic response was investigated in two natural
istic music listening situations. Fifty participants in an aerobic exe
rcise class, and 50 participants in a yogic relaxation class were pres
ented with five three-minute musical excerpts representing a range of
complexity. Participants rated these excerpts on scales of either liki
ng or complexity and appropriateness. The relationship between ratings
of liking and complexity was broadly consistent with the prediction o
f an inverted-U function, although not significantly so in the data ob
tained from the aerobics group. The prediction that a positive monoton
ic relationship should exist between ratings of liking and appropriate
ness was also confirmed.