[eng] The Side-Effect Effect (SEE) refers to the influence of moral considerations in the use of non-moral
concepts such as intentionality. Research has consistently shown that people consider harmful side
effects of an action more intentional than helpful side effects. There is an ongoing debate about how
to explain this asymmetric pattern of judgment and the psychological factors involved in it. A
prominent explanation, known as the motivational bias account, posits a possible role of affective
processes in intentionality attributions. According to this view, affective reactions could trigger a
motivation to blame agents that bring about harmful side effects, which acts expansively on
intentionality attributions. We call this the affective bias hypothesis (ABH). Evidence for the ABH is
mixed, with some findings suggesting a role for affective processes, while others suggesting that
affective processes play no role in the SEE. A possible explanation for these apparently contradictory
results points to affective processes involved in the SEE being confined to anger. In a series of
empirical studies, we systematically measured and manipulated participants’ anger in order to test
the ABH. Together with the existing empirical literature, our findings suggest that affective processes
play no role in intentionality judgments in SEE cases, while providing support for a non-emotional
motivation to blame as a factor underlying the SEE.