Trait Anxiety and Fear Responses to Safety Cues: Stimulus Generalization or Sensitization?

Abnormal fear responding to threat cues may contribute to the aetiology and maintenance of persistent fears and pathological anxiety. Chronic anxiety may also involve abnormal fear responding to ??safety?? cues, which do not signal danger. Yet investigations of fear responding to acquired safety cues are scarce and the basis of such responding remains unclear. Moreover, previous studies do not distinguish between stimulus generalization (an associative mechanism based on perceptual similarity between threat and safety cues) and sensitization (a non-associative mechanism whereby fear responses to any novel, intense, or fear-related stimulus are temporarily elevated). This study investigated responses to acquired safety cues in volunteers with varying trait anxiety, using a novel fear conditioning paradigm designed to distinguish between effects of trait anxiety on generalization and sensitization. The paradigm used three conditioned stimuli: a threat cue (CS+) and two safety cues (CS?), one perceptually similar to the CS+ and one perceptually dissimilar. Conditioned fear to these cues was indexed by fear potentiation of the startle blink reflex, skin conductance responses, and self-report. To examine how trait anxiety moderated responses to safety cues, participants were divided into high and low trait anxiety subgroups. Startle, skin conductance, and self-reported fear measures indicated that generalization of fear occurred for the safety cue which resembled the threat cue, but not for the perceptually dissimilar safety cue, consistent with the stimulus generalization hypothesis. There was some evidence that stimulus generalization was exaggerated in anxious individuals. The current study sheds light on the mechanism by which fear responses to safety cues arise in healthy individuals, and offers some insight into the influence of this mechanism in chronic anxiety.     

Health Promotion,Health Locus of Control,and Health Behavior: Two Field Experiments1

In spite of a sizable body of research on the effects of information promotions on health knowledge and health behavior, relatively little is known about how such efforts affect change (or why they do not). This paper addresses that problem by exploring the particular role that health locus of control (HLC) beliefs play in individual responses to health promotion efforts aimed at encouraging preventive health behaviors. Two field experiments are presented. The first experiment examined the extent to which HLC beliefs are related to differences in individual levels of health knowledge following the distribution of an informational booklet on health. Internals high on health value who received the information booklet demonstrated greater health knowledge three months later than did other subjects, although this difference was greater among men than among women. The second experiment explored how HLC beliefs interact with differently framed “control” messages to promote behavior change in breast self-examination (BSE). HLC beliefs interacted with the control language of the BSE promotional message and a neutral reminder to affect subsequent BSE practice. Together, these studies suggest a more influential role for health locus of control beliefs in shaping responses to health messages than has previously been documented in field settings.     

Further explorations of common-sense representations of common illnesses

A simple method is presented for measuring people's illness cognitions--their common-sense representations of common illnesses. Data were collected from 1,628 different respondents who described a recent illness form 1 to 3 separate times over a 17-month period. A free-clustering task performed by a set of naive participants confirmed that these cognitions fall into the five components that have been previously noted: identity, time line, consequences, cause, and cure. These five components are found to be reasonably stable over time and across different illness episodes. Several consequences of these illness cognitions, in terms of changes in health-locus-of-control beliefs and different propensities to visit a doctor, are also noted. Specifically, controllable attributions for getting sick and personal responsibility attributions for getting better are associated with increased beliefs in Self-Control Over Health and decreased beliefs in Chance Health Outcomes; people with strong Identity and Cure components in their common-sense representations of common illnesses have a greater propensity to visit a doctor when feeling ill.     

A simple method to record arm positioning movements in man with an Apple computer

This paper describes a simple method to record arm positioning movements in humans, via the game paddle entry of an Apple computer. A machine language subroutine reads the successive positions of a rotating potentiometer, with an angular accuracy of .5 deg and a time interval between two measures of 2.5 msec, and stores them sequentially in RAM memory. These measures can be retrieved for further computations of movement parameters.     

Undergraduates' perceptions and evaluations of career guidance activities: A Hong Kong study

There have been several research studies in Britain and Australia into the usefulness of different career guidance activities. Similar issues are examined in a study of 493 undergraduates at City University of Hong Kong. The results demonstrate that the uses of counselling services have been perceived rather narrowly and instrumentally. Career guidance activities which are perceived as 'tools' for practical or immediate help have been under-utilised. The five most popular career guidance activities are characterised as being specific in content, information-based, externally focused, and structured in process. In examining the results within the context of Chinese culture, it is suggested that counselling processes which help the students engage in more self-exploration and self-discovery can be encouraged.     

Value and Sex-Role Orientation of Chinese Adolescents

The value preference of a sample of Chinese adolescent high school students, as measured by the Rokeach Value Survey, showed a greater emphasis on the personal and competency values. Specifically, adolescents in this study tended to favour a joyous, comfortable, free, and enjoyable lifestyle. It was found that the four most important terminal values were: freedom, true friendship, happiness, and a comfortable life, while the four least important were: mature love, national security, an exciting life, and salvation. The four most important instrumental values included: capable, cheerful, broadminded, and intellectual, while the four least important included: logical, imaginative, clean, and obedient. The relationships between value preference and sex role were examined and close relationships were found, especially with respect to the instrumental values. Specifically, masculine adolescents were more agentic and instrumental, and feminine adolescents were more expressive and communal in their value preference. Androgynous adolescents were found more similar to the masculine than to the feminine group. In addition, regression analyses showed that masculinity tended to have more pervasive effects than femininity on adolescents' value preference. The implications and significance of the findings of this study in contrasting the general collectivistic depiction of Chinese and in relating to adolescent development, are discussed.     

Development of the Multi-Trait Personality Inventory (MTPI): comparison among four Chinese populations.

Anemic approach was adopted to develop a culture-specific instrument for the assessment of Chinese personality. The Multi-Trial Personality Inventory (MTPI) was administered to 1,673 men and 944 women in four major Chinese populations. It was found that Chinese in mainland China, Taiwan, Hong Kong, and the United States possess some common traits deeply rooted in the Chinese culture characterized by Confucian thoughts (e.g., self-discipline and moderation) and some additional traits nurtured by their respective environments. Consequently, findings of this study lent support to the hypothesis that, in spite of superficial discontinuities, there are basic continuities in the personality traits of mainland and overseas Chinese. The cross-cultural differences in personality were examined from a political-social perspective and also explained with a cultural-ecological model. In the development of the MTPI, a new methodology that relies on forming factor-consistent clusters was employed to deal successfully with the problem of complex factor space.