Core,animal reminder,and contamination disgust: Three kinds of disgust with distinct personality,behavioral, physiological,and clinical correlates

We examined the relationships between sensitivity to three kinds of disgust (core, animal-reminder, and contamination) and personality traits, behavioral avoidance, physiological responding, and anxiety disorder symptoms. Study 1 revealed that these disgusts are particularly associated with neuroticism and behavioral inhibition. Moreover, the three disgusts showed a theoretically consistent pattern of relations on four disgust-relevant behavioral avoidance tasks in Study 2. Similar results were found in Study 3 such that core disgust was significantly related to increased physiological responding during exposure to vomit, while animal-reminder disgust was specifically related to physiological responding during exposure to blood. Lastly, Study 4 revealed that each of the three disgusts showed a different pattern of relations with fear of contamination, fear of animals, and fear of blood–injury relevant stimuli. These findings provide support for the convergent and divergent validity of core, animal-reminder, and contamination disgust. These findings also highlight the possibility that the three kinds of disgust may manifest as a function of different psychological mechanisms (i.e., oral incorporation, mortality defense, disease avoidance) that may give rise to different clinical conditions. However, empirical examination of the mechanisms that underlie the three disgusts will require further refinement of the psychometric properties of the disgust scale.     

Disgust domains in the prediction of contamination fear

Previous research has shown a relationship between the emotion of disgust and the fear of contamination. Heightened sensitivity to disgust and increased concerns over contamination has been observed in various disorders, such as obsessive-compulsive disorder (OCD) and specific phobias. However, there is a paucity of research identifying the specific domains of disgust that contribute to contamination fear. The present study soughts to determine which domains of disgust elicitors reliably predict scores on a measure of OCD contamination obsessions and washing compulsions. We further conducted exploratory analyses that examined differences in disgust sensitivity among individuals classified as high and low in contamination fear. Three hundred and twenty-three undergraduate participants completed two measures of disgust sensitivity (Disgust Scale; Disgust Emotion Scale) and a measure of contamination fear (Padua inventory, contamination obsessions and washing compulsions subscale). Stepwise multiple regression analyses indicated that contamination fear was best predicted by seven different disgust domains, thereby suggesting that contamination fear is accounted for by generalized, rather than domain-specific, disgust elicitors. The categories of disgust that predicted contamination fear appeared to have an underlying commonality of threat of contagion. The relationship between fear of contamination and disgust sensitivity was more pronounced for animal reminder disgust elicitors as opposed to core disgust elicitors. Results also showed that individuals classified as high in contamination fear scored significantly higher than the low contamination fear group on all disgust domains. Clinical and research implications regarding the interrelationships between fear, disgust, and the fear of contamination are discussed.     

Contamination Appraisals,Pollution Beliefs,and the Role of Cultural Inheritance in Shaping Disease Avoidance Behavior

Despite the upsurge of research on disgust, the implications of this research for the investigation of cultural pollution beliefs has yet to be adequately explored. In particular, the sensitivity of both disgust and pollution to a common set of elicitors (e.g., bodily emissions, disease, and death) suggests a common psychological basis, though several obstacles have prevented an integrative account, including methodological differences between the relevant disciplines. Employing a conciliatory framework that embraces both naturalistic (evolutionary) and humanistic levels of explanation, this article examines the dynamic reciprocal process by which contamination/contagion appraisals in individuals serve to shape—and are in turn shaped by—culture‐specific pollution beliefs. This complex interrelationship is illustrated by examining ancient Near Eastern and modern ethnographic documentation of pollution beliefs, highlighting the underappreciated function of these pollution beliefs as folk theories for the spread of infectious disease. By evaluating how pollution beliefs (as also modern germ theory) shape contamination appraisals in individuals, it will be argued that cultural inheritance has played a much larger role in guiding disease avoidance behavior than has been previously recognized.     

Identification and explanation of racial differences on contamination measures

Compared with published norms, African Americans endorse significantly more items intended to assess pathological anxiety about contamination on self-report instruments for obsessive–compulsive disorder. The current study suggests that this is not due to greater psychopathology in African Americans, but rather to differences in normal attitudes about cleanliness that also influence responses to items intended to assess anxiety pathology. Contamination items from obsessive–compulsive disorder (OCD) scales including the Padua Inventory [Sanavio E. (1988). Obsessions and compulsions: The Padua Inventory. Behaviour Research and Therapy, 26(2), 169–177] were supplemented with cleanliness attitude items and administered to Black and White participants (N=1483). An exploratory factor analysis suggested a three-factor solution: one factor that encompassed pathological anxiety, and two that expressed attitudes about cleanliness, grooming, and domestic animals. African Americans scored significantly higher on all three factors. A confirmatory factor analysis demonstrated that the difference between Black and White participants on the pathological anxiety factor was eliminated when differences on the attitude factors were controlled statistically.     

Vulnerability to mental contamination

Mental contamination refers to feelings of contamination that arise without physical contact with a contaminant. Mental contamination has been documented among sexual assault victims, some of whom report feeling dirty and wanting to wash in response to memories of the assault. This study examined variables associated with increased vulnerability to mental contamination. Female undergraduates (n=100) filled out a series of questionnaires and listened to an audiotape that instructed them to imagine experiencing a forced kiss by an undesirable male. Controls (n=20) imagined a consensual kiss by a desirable male. Women in the non-consensual condition reported stronger feelings of dirtiness and urge to wash than those in the consensual condition. Twenty-seven women in the non-consensual condition spontaneously rinsed in order to alleviate physical sensations evoked by the tape. Regression analyses revealed that significant predictors of dirtiness included contact contamination fear and disgust sensitivity, and there was a trend for anxiety sensitivity to predict dirtiness. Contact contamination fear was also a significant predictor of urge to wash. Prior experience with unwanted sexual contact was a significant predictor of rinsing, and there was a trend for fear of negative evaluation to predict rinsing. Discussion focuses on the implications of these findings for our understanding of mental contamination.     

Evidence for an explanation advantage in naïve biological reasoning

The present studies compare young children’s explanations and predictions for the biological phenomenon of contamination. In Study 1, 36 preschoolers and 24 adults heard vignettes concerning contamination, and were asked either to make a prediction or to provide an explanation. Even 3-year-olds readily supplied contamination-based explanations, and most children mentioned an unseen mechanism (germs, contact through bodily fluids). Moreover, unlike adults who performed at ceiling across both explanation and prediction tasks, children were significantly more accurate with their explanations than their predictions. In Study 2, we varied the strength of cues regarding the desirability of the contaminated substance (N = 24 preschoolers). Although desirability affected responses, for both levels of desirability participants were significantly more accurate on explanation than prediction questions. Altogether, these studies demonstrate a significant “explanation advantage” for children’s reasoning in the domain of everyday biology.     

La compréhension des causes biologiques de la maladie par les enfants

This article reviews research on the extent to which children can and do understand the biological basis for illness transmission. Recent studies demonstrate that even preschoolers can grasp the invisible nature of microbial contamination. However, they may not readily identify germs as organisms that reproduce and multiply and that require an incubation period to produce symptoms of illness. Moreover, the acceptance of purification techniques that reverse the effects of contamination is strongly influenced by culture. For example, Indian children, compared to their American counterparts, often judge that the contamination of liquids cannot be reversed even with boiling and cooling. Work in developing countries suggests that early experience with biological explanations for illness is important for adults’ understanding of illness transmission.     

The moderating effects of contamination sensitivity on state affect and information processing: Examination of disgust specificity

Although contamination sensitivity has been implicated in several disorders, there is a paucity of research examining the influence of this trait on various outcomes. Accordingly, the present study examined the extent to which individual differences in contamination sensitivity moderated state affect in response to a mood induction and subsequent information processing biases, as assessed by a lexical decision task (LDT). It was hypothesised that the moderating effects of contamination sensitivity would be specific to disgust responding to a negative but not positive mood induction, and to reaction times to disgust and fear compared to happy words on the LDT. The findings were largely consistent with this hypothesis, as contamination sensitivity predicted increased disgust and arousal to the negative mood induction. Contamination sensitivity was also a better predictor of reaction times to disgust and fear words than happy words. However, the moderating effect of contamination sensitivity on reaction times on the LDT was not mediated by its effects on response to the negative mood induction. Implications of these findings for conceptualising the role of contamination sensitivity and its association with disgust in specific disorders are discussed.