The disgust traits: Self-other agreement in pathogen, sexual, and moral disgust sensitivity and their independence from HEXACO personality.

A broad literature indicates that pathogen, sexual, and moral disgust sensitivity relate to, among other things, political attitudes, moral condemnation, and symptoms of psychopathology. Consequently, disgust sensitivity has been widely assessed across subfields of psychology. Yet, no work has examined whether self-reports in disgust sensitivity reflect systematic trait variation that is detectable by others, and the extent to which such variation is distinct from broader personality. Here, we present the first study to examine self-other agreement in pathogen, sexual, and moral disgust sensitivity. Romantic partners (n1 = 290), friends (n2 = 212), and acquaintances (n3 = 140) rated each other on these three domains of disgust sensitivity and on HEXACO personality. Correlations between dyad partners' self and other ratings were calculated to estimate the magnitude of self-other agreement. We found self-other agreement in all domains of disgust sensitivity (rs of .46, .66, and .36 for pathogen, sexual, and moral disgust sensitivity, respectively), with this agreement weakly to moderately inferred from personality perceptions (percentages mediated by HEXACO were 15%, 7%, and 33% for pathogen, sexual, and moral disgust sensitivity, respectively). These results suggest that pathogen, sexual, and moral disgust sensitivity reflect systematic trait variation that is detectable by others and distinct from broader personality traits. (PsycInfo Database Record (c) 2023 APA, all rights reserved).

Sex, Drugs, and Genes: Illuminating the Moral Condemnation of Recreational Drugs.

Over the past decade, evolutionary psychologists have proposed that many moral stances function to promote self-interests. At the same time, behavioral geneticists have demonstrated that many moral stances have genetic bases. We integrated these perspectives by examining how moral condemnation of recreational drug use relates to sexual strategy (i.e., being more vs. less open to sex outside of a committed relationship) in a sample of Finnish twins and siblings (N = 8,118). Twin modeling suggested that genetic factors accounted for 53%, 46%, and 41% of the variance in drug condemnation, sociosexuality, and sexual-disgust sensitivity, respectively. Further, approximately 75% of the phenotypic covariance between drug condemnation and sexual strategy was accounted for by genes, and there was substantial overlap in the genetic effects underlying both drug condemnation and sexual strategy (rg = .41). Results are consistent with the proposal that some moral sentiments are calibrated to promote strategic sexual interests, which arise partially via genetic factors.

The multidimensional nature of food neophobia.

People vary in their willingness to try new foods. This variation, which is most frequently measured using the Food Neophobia Scale (FNS; Pliner & Hobden, 1992), has been interpreted as unidimensional. In four studies (N's = 210, 306, 160, and 161), we 1) demonstrate that food neophobia varies across meat and plant dimensions, 2) explore the validity of a measure of meat and plant neophobia, and 3) test whether these food neophobia dimensions predict decisions to eat a novel food item (i.e., a snack bar that contains insects). Mixed-effects model across the four studies indicated that the two dimensions differentially relate to a number of variables, including disgust sensitivity, animal empathy, and masculinity. Women scored higher on meat neophobia than men, but the sexes did not differ on plant neophobia. Only meat neophobia uniquely predicted eating a novel insect-based snack bar. Overall, these results extend knowledge regarding orientations toward novel foods.

An orderly personality partially explains the link between trait disgust and political conservatism.

Individuals who are more easily disgusted tend to be more politically conservative. Individuals who have a preference for order also tend to be more politically conservative. In the present research, we hypothesised that these three variables are psychologically interrelated. Specifically, trait disgust encourages a generalised search for order, which, in turn, encourages the endorsement of political positions that aim to maintain societal order. Taking an individual differences approach, we operationalised the preference for order via Orderliness, one aspect of the Big Five trait Conscientiousness. Across six samples (total N = 1485), participants completed measures of trait disgust, aspect/trait personality, and political orientation. Analyses revealed that Orderliness was a consistent mediator of the association between trait disgust and conservatism. Analyses of subscales of disgust revealed preliminary evidence that Orderliness most consistently mediated the relationships between Contamination, Pathogen, and Sexual disgust and conservatism. These data suggest that disgust-sensitive people extend their preference for order in the physical environment (e.g. tidying up one's room) to the sociopolitical environment (e.g. strengthening traditional norms). The present findings illustrate one way in which emotional, cognitive, and personality processes work together to influence political orientation.

Cognitive and personality correlates of trait disgust and their relationship to condemnation of nonpurity moral transgressions.

Past research has found that individuals who are more sensitive to physically disgusting stimuli also condemn moral transgressions more harshly. However, there is debate about whether this condemnation includes transgressions that do not involve impure behaviors. We present a meta-analysis of 6 studies (N = 1082) which suggests that trait disgust is associated with condemnation of nonpurity transgressions. This relationship was primarily explained by sensitivity toward the very core disgust stimuli that those transgressions lack. We next tested whether this relationship might be mediated by a third variable. We found that trait core disgust was associated with higher orderliness, lower deviance sensitivity, and preference for intuitive thinking; these variables also correlated with moral condemnation. Trait disgust was also associated with lower generalized social trust, but trust was not correlated with moral condemnation. Neither trait disgust nor moral condemnation were associated with ethnocentrism. Further, none of these variables mediated the relationship between trait disgust and condemnation. Taken together, our results support a role for trait disgust in moral judgments outside of the purity domain, but leave unexplained its association with condemnation of nonpurity transgressions. (PsycINFO Database Record (c) 2019 APA, all rights reserved).

Why do people vary in disgust?

People vary in the degree to which they experience disgust toward-and, consequently, avoid-cues to pathogens. Prodigious work has measured this variation and observed that it relates to, among other things, personality, psychopathological tendencies, and moral and political sentiments. Less work has sought to generate hypotheses aimed at explaining why this variation exists in the first place, and even less work has evaluated how well data support these hypotheses. In this paper, we present and review the evidence supporting three such proposals. First, researchers have suggested that variability reflects a general tendency to experience anxiety or emotional distress. Second, researchers have suggested that variability arises from parental modelling, with offspring calibrating their pathogen avoidance based on their parents' reactions to pathogen cues. Third, researchers have suggested that individuals calibrate their disgust sensitivity to the parasite stress of the ecology in which they develop. We conclude that none of these hypotheses is supported by existing data, and we propose directions for future research aimed at better understanding this variation.This article is part of the Theo Murphy meeting issue 'Evolution of pathogen and parasite avoidance behaviours'.