The implicit moral decision exists widely in our daily life, such as the
non-deceptive counterfeit luxury consumption, imitating artwork and so
on, but its moral decision mechanism remains to be clarified. The
implicit moral decision has two distinct characteristics compared with
the traditional moral decision, namely the difficulty in assessing
consequences and the vague moral boundaries. This study is dedicated to
studying how moral beliefs affect individuals’ moral decision process
and decision outcomes in implicit moral decisions, as well as the effect
of attitude function, which can impact the implicit degree of moral
decision. We employed transcranial direct current stimulation (tDCS) to
examine the neural underlying and the effect of moral belief on
counterfeit luxury consumption. Our results showed that the moral belief
in counterfeit luxury consumption was higher for the a-tDCS group (left
anodal/right cathodal tDCS over dorsolateral prefrontal cortex) than the
s-tDCS group (sham stimulation). The purchase intention of the s-tDCS
group is higher than that of the a-tDCS group. Moreover, the response
time of the value-expressive function is longer for the a-tDCS group
than that of the s-tDCS group. Hence, these results suggested that moral
beliefs can change implicit moral decisions, which is also related to
the left dorsolateral prefrontal cortex (DLPFC). Besides, attitude
functions can affect the relationship between moral beliefs and moral
decision processes, but it does not affect the relationship between
moral beliefs and moral decision outcomes. In summary, these findings
can help solve the social problems caused by implicit moral decisions.