Et. Higgins et al., WHEN COMBINING INTRINSIC MOTIVATIONS UNDERMINES INTEREST - A TEST OF ACTIVITY ENGAGEMENT THEORY, Journal of personality and social psychology, 68(5), 1995, pp. 749-767
Three studies with elementary school children demonstrated that combin
ing reading with coloring pictures can undermine children's later inte
rest in reading, while also reducing their interest in coloring. Under
mining is maximized when an activity is identified as secondary during
the initial engagement, but other conditions must also be met as spec
ified by activity engagement theory (Higgins and Trope, 1990): (a) the
multiple input activities must be separately identified and considere
d simultaneously as alternatives, (b) the activity identified as prima
ry during initial engagement must not be perceived as very attractive,
and (c) the responses connected to an identified activity during the
initial engagement must be activated subsequently. Conditions for enha
ncing interest in an activity are also considered.