Emotions vary in intensity. But what is it that varies? There are many
parameters that can be considered parameters of emotional intensity,
and it is unclear how these parameters are related. The main question
of this study is: Is the subjective intensity of emotion one dimension
al, and, if not, what are its dimensions? We sampled 222 instances of
emotions, and for each instance subjects completed a questionnaire. Th
e subjects also drew a diagram of the course of their emotion over tim
e. A factor analysis of the intensity questions and the diagram variab
les yielded six factors: (1) duration of the emotion and delay of its
onset and peak; (2) perceived bodily changes and strength of felt pass
ivity; (3) recollection and re-experience of the emotion; (4) strength
and drasticness of action tendency, and drasticness of actual behavio
ur; (5) belief changes and influence upon long-term behaviour; and (6)
overall felt intensity. Most specific dimensions correlated moderatel
y with overall felt intensity. Special attention is given to the relat
ion between intensity and the duration of emotion.