How the expertise heuristic accelerates decision-making and credibility judgments in social media by means of effort reduction

Real-time communication, unlimited distribution of information, and the lack of editorial supervision in social media communication aggravate recipients' credibility evaluations and information selection by what aspects of the source such as expertise have emerged as important anchors for evaluations. It has long been assumed that credibility judgments in social media are specifically guided by heuristics. However, the existing studies merely give indications, for example, based on individuals' self-report but do not test whether important attributes and prerequisites of heuristic decision-making, such as effort reduction, are present. Against this background, the current study (N = 185) analyses by applying a reduced two-alternative choice paradigm whether the relation between the expertise cue and credibility judgments and the choice of information sources is guided by a heuristic, namely the expertise heuristic. Findings indicate that the presence of the expertise cue reduced respondents' task latencies significantly, although participants' decision behavior was not independent from additional information. This is discussed in detail with recourse to theoretical conceptualizations of cognitive heuristics.

Automated summary

Real-time communication and unlimited information distribution in social media, along with the absence of editorial supervision, pose challenges for recipients' credibility evaluations and information selection. The source's expertise has emerged as an important factor in these evaluations. While previous studies suggest that credibility judgments in social media are guided by heuristics, they have not thoroughly examined the attributes and prerequisites of heuristic decision-making. This study investigates the influence of expertise on credibility judgments and the choice of information sources using a two-alternative choice paradigm, finding that the presence of expertise cues significantly reduces response time but does not completely override the influence of additional information.