Can deliberation increase charitable giving when giving is impulsive (i.e., aone-time small gift in response to an immediate appeal)? We conduct two studiesin Israel and Sweden to compare two forms of deliberation, unguided and guided,in their ability to decrease the singularity effect (i.e., giving more to onethan many victims), often evident in impulsive giving. Under unguideddeliberation, participants were instructed to simply think hard before making adonation decision whereas participants in the guided deliberation condition wereasked to think how much different prespecified decision attributes shouldinfluence their decision. We find that both types of deliberation reduce thesingularity effect, as people no longer value the single victim higher than thegroup of victims. Importantly, this is driven by donations being decreased underdeliberation only to the single victim, but not the group of victims. Thus,deliberation affects donations negatively by overshadowing the affectiveresponse, especially in situations in which affect is greatest (i.e., to asingle victim). Last, the results show that neither type of deliberationsignificantly reversed the singularity effect, as people did not help the groupsignificantly more than the single victim. This means that deliberate thinkingdecreased the overall willingness to help, leading to a lower overall valuationof people in need.