Men are innocent until proven guilty: a comment on the examination of sex differences by Pierce and Kirkpatrick (1992)

Sex differences in response to an observational fear conditioning procedure

The present study evaluated sex differences in observational fear conditioning using modeled "mock" panic attacks as an unconditioned stimulus (UCS). Fifty-nine carefully prescreened healthy undergraduate participants (30 women) underwent 3 consecutive differential conditioning phases: habituation, acquisition, and extinction. It was expected that participants watching a confederate display mock panic attacks (UCS) paired with a previously neutral stimulus (CS(+)) would learn to respond fearfully to the CS(+), but not to the CS(-) (i.e., a stimulus never associated with displays of panic). Women also were expected to report more distress and ratings of panic to the CS(+) than the CS(-) compared to men, but no sex differences were anticipated on autonomic indices of conditioning (i.e., electrodermal responses). Consistent with expectation, aversive conditioning was demonstrated by greater magnitude electrodermal and verbal-evaluative (e.g., subjective units of distress scale, panic ratings) responses to the CS(+) over the CS(-), with women reporting more distress to the CS(+) over the CS(-), but not greater autonomic conditioning, compared to men. Overall, the results support the notion that modeled panic attacks can serve as a potent UCS for both men and women. Discussion focuses on sex differences in observational fear conditioning and its relation to the clinical presentation of anxiety disorders.

Sex differences in response to a panicogenic challenge procedure: An experimental evaluation of panic vulnerability in a non-clinical sample

Epidemiological studies show that women are twice as likely as men to develop panic disorder (PD) during their lifetimes. Data from retrospective studies also suggest that women are more distressed by panic and other negative emotional states than men, and that this tendency may precede the development of PD. The present prospective study sought to expand this work by evaluating sex differences in the predisposition to panic in individuals without PD or other forms of psychopathology. Participants (N=96; 52 women) were exposed to 12 panicogenic inhalations of 20% CO2-enriched air while physiological (e.g., heart rate, electrodermal response, Frontalis EMG) and self-report (e.g., subject distress, fear, frequency and severity of DSM-IV panic symptoms) response domains were monitored. As expected, magnitude of autonomic responding failed to reliably discriminate between women and men. Yet, women reported more fear and panic immediately following the challenge procedure relative to men, and this sex difference persisted when assessed again 30 min post-challenge. Implications of these results are discussed broadly in the context of biopsychosocial accounts of sex differences in the clinical presentation of PD.

Dental fear in Australia: who's afraid of the dentist?

BACKGROUND

This study aimed to describe both the prevalence of dental fear in Australia and to explore the relationship between dental fear and a number of demographic, socio-economic, oral health, insurance and service usage variables.

METHODS

A telephone interview survey of a random sample of 7312 Australian residents, aged five years and over, from all states and territories.

RESULTS

The prevalence of high dental fear in the entire sample was 16.1 per cent. A higher percentage of females than males reported high fear (HF). Adults aged 40-64 years old had the highest prevalence of high dental fear with those adults aged 80+ years old having the least. There were also differences between low fear (LF) and HF groups in relation to socioeconomic status (SES), with people from higher SES groups generally having less fear. People with HF were more likely to be dentate, have more missing teeth, be covered by dental insurance and have a longer time since their last visit to a dentist.

CONCLUSIONS

This study found a high prevalence of dental fear within a contemporary Australian population with numerous differences between individuals with HF and LF in terms of socioeconomic, socio-demographic and self-reported oral health status characteristics.

Gender differences in dimensions of anxiety sensitivity

Anxiety sensitivity (AS) is the fear of anxiety-related sensations arising from beliefs that these sensations have harmful physical, psychological, or social consequences. AS is measured using the Anxiety Sensitivity Index (ASI), a 16-item self-report questionnaire. Little is known about the origins of AS, although social learning experiences (including sex-role socialization experiences) may be important. The present study examined whether there were gender differences in: (a) the lower- or higher-order factor structure of the ASI; and/or (b) pattern of ASI factor scores. The ASI was completed by 818 university students (290 males; 528 females). Separate principal components analyses on the ASI items of the total sample, males, and females revealed nearly identical lower-order three-factor structures for all groups, with factors pertaining to fears about the anticipated (a) physical, (b) psychological, and (c) social consequences of anxiety. Separate principal components analyses on the lower-order factor scores of the three samples revealed similar unidimensional higher-order solutions for all groups. Gender x AS dimension analyses on ASI lower-order factor scores showed that: females scored higher than males only on the physical concerns factor; females scored higher on the physical concerns factor relative to their scores on the social and psychological concerns factors; and males scored higher on the social and psychological concerns factors relative to their scores on the physical concerns factor. Finally, females scored higher than males on the higher-order factor representing the global AS construct. The present study provides further support for the empirical distinction of the three lower-order dimensions of AS, and additional evidence for the theoretical hierarchical structure of the ASI. Results also suggest that males and females differ on these various AS dimensions in ways consistent with sex role socialization practices.