Social anxiety and fear of bodily sensations in panic disorder and agoraphobia: A matched comparison

This study tests the hypothesis that social anxiety and fear of bodily sensations are associated with the development of agoraphobic avoidance behavior in panic disorder patients. Twenty patients with panic disorder were compared to 20 patients with panic disorder with agoraphobia, matched by sex and duration of disorder. The two groups did not differ on measures of fear and frequency of assertive social responses. However, the agoraphobics scored higher on measures of interpersonal sensitivity, depression, feelings of inadequacy, and hostility. They also reported higher fear of bodily sensations. Although definitive conclusions need to be postponed until prospective studies have been conducted, there is evidence suggesting that the development of agoraphobia in panic patients is associated with hypersensitivity to bodily sensations and interpersonal situations.This research was supported by Grant 560-268-009 of the Dutch Organization for Scientific Research.     

Psychometric properties of the French version of Brief Sensation Seeking Scale (B-SSS)

IntroductionA French version of the Briefing-Sensation Seeking Scale (B-SSS) (Hoyle et al., 2002) was developed according to a process of double reverse translation.ObjectiveTwo studies were then led to validate the psychometrics properties (validity and the reliability) of this French version of the B-SSS.MethodsIn the first study, 97 participants (14–24 years old) answered the original version (in English) and the translated version (in French). In the second study, 124 participants (14–24 years) answered the French version at two times measurement. Psychometrics analyses brings together reliability indices (Cronbach's alpha and temporal stability) and concurrent validity indices.ResultsFor both studies, Cronbach alphas were used to assess internal consistency, while intraclass coefficients (ICC) demonstrated temporal stability. In the second study, Pearson correlations between the French version and the ImpSS supported concurrent validity. Reliability is acceptable in the first study (α = .601 in, 674; ICC = .550–.895) and satisfactory in the second study (α = .734–.755; ICC = .650–.948). Pearson's correlation of the French version of the B-SSS and the ImpSS varies between .658 and .754.ConclusionPsychometrics properties of the French version of the B-SSS show that this scale can be used to measure sensation seeking with teenagers and for young adults.     

Balancing awareness: Vestibular signals modulate visual consciousness in the absence of awareness

The processing of visual and vestibular information is crucial for perceiving self-motion. Visual cues, such as optic flow, have been shown to induce and alter vestibular percepts, yet the role of vestibular information in shaping visual awareness remains unclear. Here we investigated if vestibular signals influence the access to awareness of invisible visual signals. Using natural vestibular stimulation (passive yaw rotations) on a vestibular self-motion platform, and optic flow masked through continuous flash suppression (CFS) we tested if congruent visual–vestibular information would break interocular suppression more rapidly than incongruent information. We found that when the unseen optic flow was congruent with the vestibular signals perceptual suppression as quantified with the CFS paradigm was broken more rapidly than when it was incongruent. We argue that vestibular signals impact the formation of visual awareness through enhanced access to awareness for congruent multisensory stimulation.     

Psychosocial consequences of recurrent vertigo

Abstract

Chronic vertigo is known to be associated with anxiety and depression in a significant proportion of patients, but there have been no systematic investigations into beliefs and behaviour related to recurrent vertigo. Twenty-three individuals with vertigo of various types were interviewed, generating over two thousand statements about vertigo and its psychosocial consequences. By means of progressive categorisation these were condensed into four tables of summary statements representing prevalent reactions to and effects of vertigo. Vertigo is viewed as intrinsically frightening and potentially stigmatising. In an attempt to avoid provoking attacks, particularly in public, subjects tended to impose restrictions on their activities and lifestyle which generated further feelings of helplessness and frustration. The statements obtained in this study provide an empirical basis for the development of a model that may be used to formulate predictions about the relationship between vertigo, handicap and distress, and the benefits of intervention.     

Left caloric vestibular stimulation as a tool to reveal implicit and explicit parameters of body representation

Homeostatic parameters, such as temperature, are related to body representation. In this study, we measured whether caloric vestibular stimulation (CVS) alters body temperature and tactile processing, and if in the direction predicted by a holistic body matrix representation.Skin temperature and tactile two-point discrimination (TPD) acuity were measured for both arms before, immediately after and with a delay from CVS. Participants were also administered a personality questionnaire and an anxiety inventory to rule out confounding factors. Two control experiments were planned to exclude casual variations.Our results show that temperature drops significantly in both arms after CVS. CVS also induces a bilateral improvement in tactile acuity (even though not immediately after but in the delayed condition). Finally, these effects are not due to learning, as demonstrated by the control experiment.In summary, our results suggest that vestibular stimulation updates body representation, supporting the evidence in favor of a body matrix.     

Embodied information affects judgements about politicians: The impact of haptic weight sensations and hand cleansing

Politicians' characteristics attract voters' attention and dominate impression formation. Thereby, social judgements are deduced from different information being available in a certain situation. The literature suggests that incidental bodily sensations can influence judgement processes. Here, two bodily treatments—the haptic sensation of weight and the act of hand cleansing—simultaneously contribute to judgements about politicians. This study expands previous works by (a) investigating potential interactions of two haptic information cues, (b) providing evidence for the significant role of conceptual closeness between embodied cues and judgement dimensions, (c) showing that hand cleansing leads to harsher moral judgements independently of whether a misconduct has been committed or not, and (d) showing that the familiarity of the target to be judged does not moderate the effect of embodied information. The results demonstrate that judgements can be modulated by basal sensorimotor experiences. We discuss implications and the important issue of result generalisation and replicability.     

Sympathetic arousal to a vestibular stressor in high and low hostile men

The aim of the present experiment was to extend the literature on hostility and a cerebral systems based model of sympathetic arousal to a vestibular-based stress. Several authors have concluded that autonomic stress reactivity in high hostile individuals must be interpersonally based, whereas healthy vestibular system functioning does not depend on interpersonal features. Utilizing a vestibular activation paradigm, skin conductance levels of 15 high hostile and 15 low hostile men were recorded after brief passive rotation about the vertical neuroaxis. It was expected that hostile individuals would exhibit higher skin conductance levels after rotation compared with low hostile individuals. The results confirmed expectations of heightened sympathetic tone among high hostiles subsequent to vestibular stress. Overall, the findings are interpreted to support a cerebral model of frontal region capacity limitation for regulation of vestibular stress that is independent of psychosocial mechanisms.     

Frames of reference for the light-from-above prior in visual search and shape judgements

Faced with highly complex and ambiguous visual input, human observers must rely on prior knowledge and assumptions to efficiently determine the structure of their surroundings. One of these assumptions is the 'light-from-above' prior. In the absence of explicit light-source information, the visual system assumes that the light-source is roughly overhead. A simple, low-cost strategy would place this 'light-from-above' prior in a retinal frame of reference. A more complex, but optimal strategy would be to assume that the light-source is gravitationally up, and compensate for observer orientation. Evidence to support one or other strategy from psychophysics and neurophysiology has been mixed. This paper pits the gravitational and retinal frames against each other in two different visual tasks that relate to the light-from-above prior. In the first task, observers had to report the presence or absence of a target where distractors and target were defined purely by shading. In the second task, observers made explicit shape judgements of similar stimuli. The orientation of the stimuli varied across trials and the observer's head was fixed at 0, +/-45 or +/-60 degrees . In both tasks the retinal frame of reference dominated. Visual search behaviour with shape-from-shading stimuli (SFS) was modulated purely by stimulus orientation relative to the retina. However, the gravitational frame of reference had a significant effect on shape judgements, with a 30% correction for observer orientation. In other words, shading information is processed quite differently depending on the demands of the current task. When a 'quick and dirty' representation is required to drive fast, efficient search, that is what the visual system provides. In contrast, when the task is to explicitly estimate shape, extra processing to compensate for head orientation precedes the perceptual judgment. These results are consistent with current neurophysiological data on SFS if we re-frame compensation for observer orientation as a cue-combination problem.     

The human sense of the head's polarity is influenced by changes in the magnitude of gravity

The present investigation concerns the integrity of a primary mental function, the egocentric frame of reference and the sense of polarity of one's own head. The visually perceived eye level (VPEL) and the subjective antero-posterior axis of the head were measured by means of a visual indicator in darkness during two stimulus conditions: static pitch (sagittal-plane) tilting in the 1-g environment and gondola centrifugation (2G). It is demonstrated that an increase in the magnitude of the gravitoinertial (G) force, acting in the direction of the head and body long (z) axis, causes a substantial change not only in the VPEL but also in the perceived direction of the antero-posterior axis of the head.     

The body sensation hypothesis: A new contribution to the understanding of preventive health behavior

Abstract

A conceptualization of preventive health behaviors (PHBs) is outlined which focuses upon the body sensations that accompany performance of PHB. While many workers have noted that the sensory consequences associated with PHB may be important in understanding why non-symptomatic, healthy individuals engage in PHB, current models of PHB ignore this dimension of health behavior. The Body Sensation Hypothesis suggests that an important function of PHB may be to regulate body sensations by eliminating and avoiding aversive sensations and to produce pleasurable sensations. The implications of the Body Sensations Hypothesis for the definition of PHB, the acquisition of PHB, health education and health-cognitions, and sex differences in PHB are discussed.