  Background. Incidental emotions users feel during their online activities may
alter their privacy behavioral intentions.
  Aim. We investigate the effect of incidental affect (fear and happiness) on
privacy behavioral intention.
  Method. We recruited $330$ participants for a within-subjects experiment in
three random-controlled user studies. The participants were exposed to three
conditions \textsf{neutral}, \textsf{fear}, \textsf{happiness} with
standardised stimuli videos for incidental affect induction. Fear and happiness
were assigned in random order. The participants' privacy behavioural intentions
(PBI) were measured followed by a Positive and Negative Affect Schedule
(PANAS-X) manipulation check on self-reported affect. The PBI and PANAS-X were
compared across treatment conditions.
  Results. We observed a statistically significant difference in PBI and
Protection Intention in neutral-fear and neutral-happy comparisons. However
across fear and happy conditions, we did not observe any statistically
significant change in PBI scores.
  Conclusions. We offer the first systematic analysis of the impact of
incidental affects on Privacy Behavioral Intention (PBI) and its
sub-constructs. We are the first to offer a fine-grained analysis of
neutral-affect comparisons and interactions offering insights in hitherto
unexplained phenomena reported in the field.
