Age, gender and patterns of common intense fears among adults

Questionnaires with ratings of 133 fear items were returned by 345 women and 200 men in northwestern Indiana. Respondents ranged in age from 15 to 89 yrs. Items having at least 10% of the responses rated as terror in one of the age groups were analyzed across age. Females showed five patterns as age increased: stability of fear; increasing fear; decreasing fear; increasing fear followed by a decrease in the older groups; and decreasing fear followed by an increase in the older groups. The predominant pattern among males was a sharp decrease after the younger age groups to very low levels in the older groups. Two common intense fears—those of harmless spiders and harmless snakes—seem to meet the theoretical criteria for biological preparedness. It is concluded that the preponderance of common intense fears of adults are the result of cultural and experiential influences.     

Disgust sensitivity and the sex difference in fears to common indigenous animals

Davey's mediational hypothesis [Davey, G. C. L. (1994). Self-reported fears to common indigenous animals in an adult UK population: the role of disgust sensitivity. British Journal of Psychology, 85, 541-554.] suggests that the sex difference in self-assessed animal fears can be accounted for by the sex difference in disgust sensitivity. An empirical test failed to support this hypothesis in a non-clinical sample (N = 214). Holding constant the influences of confounders such as age, fear of contamination, sex roles, neuroticism, psychoticism and disgust sensitivity, biological sex kept emerging as a significant predictor in relation to four types of animal fears (fear-relevant animals, dry or non-slimy invertebrates, slimy or wet looking animals and farm animals). Other things being equal, high disgust sensitivity either lost its predictive capability (in relation to dry or non-slimy invertebrates and slimy or wet looking animals) or predicted high fear of fear-relevant animals and of farm animals inequivalently across, respectively, the sexes (high in females only) and age groups (high in the old only). A multifactorial, interactionist approach should be advocated in the study of the aetiology of animal fears if progress in this area is to be achieved.     

Using Genetic Analyses to Clarify the Distinction Between Depressive and Anxious Symptoms in Children

Self-report measures of depression and anxiety in children are highly correlated and distinguishing between shared and independent factors in their etiologies is therefore problematic. The aim of this article was to test whether less correlated measures of depression and anxiety could be produced and, if so, what genetic and environmental factors would account for the variance in these symptoms. Second-order factor analysis of the items from two standardized self-report questionnaires of depression and anxiety collected from 395 pairs of same-sex twins aged 8 to 16 years resulted in purer dimensions of depression and anxiety. Behavioral genetic analyses confirmed the distinction between these two dimensions, and bivariate analyses revealed that the association between the two was primarily accounted for by shared genetic factors.     

Heritability of the Big Five Personality Dimensions and Their Facets: A Twin Study

ABSTRACT The genetic and environmental etiology of the five-factor model of personality as measured by the revised NEO Personality Inventory (NEO-PI-R) was assessed using 123 pairs of identical twins and 127 pairs of fraternal twins. Broad genetic influence on the five dimensions of Neuroticism, Extraversion, Openness, Agreeableness, and Conscientiousness was estimated at 41%, 53%, 61%, 41%, and 44%, respectively. The facet scales also showed substantial heritability, although for several facets the genetic influence was largely nonadditive. The influence of the environment was consistent across all dimensions and facets. Shared environmental influences accounted for a negligible proportion of the variance in most scales, whereas nonshared environmental influences accounted for the majority of the environmental variance in all scales.     

Understanding the genetic and environmental specificity and overlap between well‐being and internalizing symptoms in adolescence

Moderate inverse correlations are typically found between well‐being and mental illness. We aimed to investigate the role of genes and environments in explaining the relationships between two aspects of well‐being and two measures of internalizing symptoms. Altogether, 4700 pairs of 16‐year‐old twins contributed data on subjective happiness and life satisfaction, as well as symptoms of depression and emotional problems. Well‐being was moderately correlated with internalizing symptoms (range = ?0.45, ?0.58). Multivariate twin model‐fitting indicated both genetic and environmental overlap. Life satisfaction and happiness demonstrated different patterns of overlap, with stronger genetic links between life satisfaction and depression. Non‐shared environmental influences were largely specific to each trait. This study supports the theory of mental health and illness being partly (but not entirely) correlated dimensions. There are also significant genetic and environmental factors to identify for well‐being that go beyond the absence of mental illness. It is therefore possible that different interventions are needed for treating mental illness and promoting mental health.     

Phobic dimensions: IV. The structure of animal fears

Research designed to determine the number and kind of dimensions underlying self-reports of animal fears is relatively rare. To contribute further knowledge to this area of study, Davey's methodology [Davey, G. C. L. (1994a). Self-reported fears to common indigenous animals in an adult UK population: the role of disgust sensitivity. British Journal of Psychology, 85, 541-554.] was improved. Principal components analysis with Varimax rotation of the self-ratings to items of Davey's Animal Fears Questionnaire returned by Ss from a Dutch community sample (N = 214) revealed four reliable, relatively independent dimensions: (1) fear-relevant animals, (2) dry or non-slimy invertebrates, (3) slimy or wet looking animals and (4) farm animals. Replicating Davey (1994a), females, relative to males, reported higher levels on most fear items. Principal components analysis with Oblimin rotation involving animal fears scales (derived from the dimensions identified in the present study), dimensions of non-animal fears, disgust sensitivity, sex-role orientation and the major dimensions of personality from the Eysenckian system revealed 4 higher-order factors, namely specific animals fears, positive affectivity, toughmindedness and negative affectivity. At an even higher level, these 4 higher-order factors merged into two factors: (1) a bipolar positive affectivity versus neuroticism/general emotionality/negative affectivity factor and (2) a toughmindedness dimension. Studies such as these contribute in helping provide the elements of the hierarchical model of fears proposed by Taylor [Taylor, S. (1998). The hierarchic structure of fears. Behaviour Research and Therapy, 36, 205-214.]. Findings across different studies suggest that there are at least 5 first-order dimensions of animal fears, the above 4 and predatory (fierce) animals, that may be included in such a model.     

Genetic and Environmental Influences on Psychopathy Trait Dimensions in a Community Sample of Male Twins

Psychopathy appears to be comprised of two broad dimensions: impulsivity/antisocial behavior and interpersonal detachment/callousness. This study examined the extent to which variance in these 2 psychopathy trait dimensions was associated with common or unique genetic, shared, and nonshared environmental factors in two independent samples of reared together 16–18-year-old male twins. One sample included 142 monozygotic (MZ) and 70 dizygotic (DZ) pairs; the other sample included 128 MZ and 58 DZ pairs. Boys completed the Minnesota Temperament Inventory (MTI), a 19-item measure that contains separate subscales: Antisocial and Detachment. Variance in the Antisocial and Detachment scales was associated with additive genetic factors and neither scale was associated with shared environmental factors. As expected, the bivariate biometric analysis suggested genetic influence on the covariance of the scales. The results are consistent with theoretical models of psychopathy that posit some independence in the etiology of the two major trait dimensions of psychopathy.     

Genetic and Rearing Environmental Influences on Adult Personality: An Analysis of Adopted Twins Reared Apart

ABSTRACT We report a genetic and environmental analysis of California Psychological Inventory (CPI) scale scores gathered on a sample of 45 sets of monozygotic twins reared apart (MZA) and 26 sets of dizygotic twins reared apart (DZA) Analysis of twin intraclass correlations and the results of models fit to the twin data demonstrate that the heritability of most scales and five factors of the CPI is about 50 When compared to results from studies of adult MZ and DZ twins reared together few of the scales demonstrate any common family environmental influence Placement coefficients on the Family Environment Scale (FES) can explain only a minor portion of the correlations for twins reared apart The influence of specific rearing environmental factors on adult personality was evaluated by analyzing the relationship between the FES and the CPI in this adoptee sample One FES factor (Cohesion vs Conflict) does correlate substantially with the CPI factor of Consensuality and may account for up to 24% of the variance in that factor, but the retrospectively gathered     

Factor analysis of the 122 item fear survey schedule

The 122 item fear survey schedule was factor analyzed in an attempt to discover whether various stimuli cluster together in their capacity to evoke anxiety. The method of factor analysis involved a rotation to an oblique structure with the result that 5 conceptually pure factors emerged accounting for at least 90 per cent of the variance. The factors were named as follows: (1) fears related to small animals, (2) fears of the precipitators and manifestations of hostility, (3) moralistically related fears and sexual fears, (4) fears of isolation and loneliness, and (5) fears of anatomical destruction and physical pain. Using the items that correlated 0.35 or better with factors, a 40 item fear survey schedule emerged. Suggestions for clinical use of this fear survey schedule were made.     

Genetic and environmental determinants of temperament: a comparative study based on Polish and German samples

This study of 1555 adult mono‐ and dizygotic twins reared together estimates the heritability of temperament traits in a Polish and a German sample. We test whether the etiology of temperament traits differs between the two cultures and between different temperament traits. We assessed temperament traits with the Formal Characteristics of Behaviour–Temperament Inventory (FCB‐TI), the Pavlovian Temperament Survey (PTS), the Revised Dimensions of Temperament Survey (DOTS‐R), and the Emotionality–Activity–Sociability Temperament Survey (EAS‐TS). Taking error of measurement into account, genetic sources of variance explained about 50% of the variance of temperament traits. We found neither reliable cultural differences nor robust differences in the etiology of the traits. However, the four questionnaires differed systematically with respect to the proportion of genetic and environmental influences on their scales. Copyright © 2002 John Wiley & Sons, Ltd.     

The longitudinal relationship between fear of positive evaluation and fear of negative evaluation

Available research suggests that fear of negative evaluation and fear of positive evaluation are related but distinct constructs that each contribute to social anxiety, implying a need to focus on these fears in treatment. Yet, this research is almost entirely based on cross-sectional data. We examined the longitudinal relationship between fears of positive and negative evaluation over three time points in a sample of undergraduate students. We tested competing models consistent with two basic positions regarding these fears: (1) that fear of positive evaluation only appears to affect social anxiety because it arises from the same, single underlying trait as fear of negative evaluation, and (2) fears of positive and negative evaluation are correlated, but clearly distinct, constructs. The best-fitting model was an autoregressive latent-trajectory model in which each type of fear had a separate trait-like component. The correlation between these trait-like components appeared to fully account for the relationships between these constructs over time. This investigation adds to the evidence in support of the second position described above: fear of positive evaluation is best interpreted as a separate construct from fear of negative evaluation.     

When time stands still: fear-specific modulation of temporal bias due to threat

The current study was designed to test the fear-specific nature of temporal bias due to threat. A temporal bisection procedure was used in which participants (N = 46) were initially trained to recognize short (400 ms) and long (1,600 ms) standard durations. In the test phase, participants were asked to judge whether the duration of computer-generated faces drawn to appear threatening, fearful, and neutral, was closer to either the short or long duration they had learnt earlier. Past research was replicated-the durations of the arousing facial expressions were overestimated relative to a low arousal (neutral) expression. Overestimation for threat was positively correlated with individual differences in fearfulness, trait anxiety, and distress. Multiple regression analyses were carried out to test the hypothesis was that individual differences in anxiety and fearfulness but not other traits would uniquely predict temporal overestimation due to threat. The results showed that fearfulness but not other traits (trait anxiety, anger, distress, activity, and sociability) was a unique and strong (partial r = .47) predictor of increased overestimation for both threatening and fearful expressions. The findings support the hypothesis that threat-related expressions activate a fear-specific system (?hman & Mineka, 2001) or fear representations (Beck & Clark, 1997) in fearful individuals.     

The genetic and environmental relationship between Cloninger's dimensions of temperament and character

The purpose of this study was to determine whether Cloninger's revised 7-factor model of personality showed incremental validity over his four dimensions of temperament. A sample of 2517 Australian twins aged over 50 between 1993 and 1995 returned completed self-reported measures of Self-directedness, Cooperativeness, and Self-transcendence from Cloninger's Temperament and Character Inventory. Many of these twins had participated in a 1988 study containing Cloninger's temperament measures of Harm Avoidance, Novelty Seeking, Reward Dependence and Persistence. Contrary to theoretical expectations, univariate analyses revealed that familial aggregation for the character dimensions could be entirely explained by additive gene action alone. Although temperament explained 26, 37 and 10% of additive genetic variance in Self-directedness, Cooperativeness and Self-transcendence, respectively, seven genetic factors were required to explain the genetic variance among the TPQ dimensions, and almost all of the non-shared environmental variance was unique to each dimension of character. Our results indicate that the inclusion of all seven dimensions in a taxonomy of personality is warranted.     

Common genetic influences on impulsivity facets are related to goal management,psychopathology, and personality

In this study, we characterized the genetic/environmental commonality and heterogeneity of impulsivity facets and tested the hypothesis that goal-management is central to their common variance. 764 young-adult twins completed the UPPS-P Impulsive Behavior Scale and measures of goal management, personality, and psychopathology. We found common genetic influences across all impulsivity facets except sensation seeking. These impulsivity genetic influences explained 40.0% of variance in goal-management ability. Other results supported three hypotheses concerning heterogeneity: that sensation seeking is independent of other facets, that urgency is more related to psychopathology than lack of premeditation, and that lack of perseverance is more similar to urgency than lack of premeditation. Thus, impulsivity facets show considerable heterogeneity in addition to common variation related to goal-management abilities.     

Common fears: a comparison of adolescents' self-generated and fear survey schedule generated fears.

Investigations into normative fear in adolescence have indicated that the most common fears are consistently death-related and danger-related. Assessments have most commonly been made from self-reports on fear survey schedules. The aim of the present study, therefore, was to determine whether adolescents would provide responses comparable to those generated through the use of a fear survey schedule when asked to list their 3 greatest fears. A total of 439 adolescents aged 11 to 18 years (237 girls, 201 boys, 1 sex not reported) listed their greatest fears; then they completed the 78-item Fear Survey Schedule for Children-II (E. Gullone & N. J. King, 1992). Consistent with past research, the 10 most common fears generated via the fear schedule related to death and danger. However, on the whole, the self-generated fears deviated from the death and danger theme, also including fear of failure, fear of animals, and fear of the unknown. A tendency toward global responses in self-generated fears appeared to encompass the majority of specific death-related fears included in the fear schedule, thus allowing for other predominant fears to be listed among the 3 most common.     

Common Fears: A Comparison of Adolescents' Self-Generated and Fear Survey Schedule Generated Fears

Investigations into normative fear in adolescence have indicated that the most common fears are consistently death-related and danger-related. Assessments have most commonly been made from self-reports on fear survey schedules. The aim of the present study, therefore, was to determine whether adolescents would provide responses comparable to those generated through the use of a fear survey schedule when asked to list their 3 greatest fears. A total of 439 adolescents aged 11 to 18 years (237 girls, 201 boys, 1 sex not reported) listed their greatest fears; then they completed the 78-item Fear Survey Schedule for Children-II (E. Gullone & N. J. King, 1992). Consistent with past research, the 10 most common fears generated via the fear schedule related to death and danger. However, on the whole, the self-generated fears deviated from the death and danger theme, also including fear of failure, fear of animals, and fear of the unknown. A tendency toward global responses in self-generated fears appeared to encompass the majority of specific death-related fears included in the fear schedule, thus allowing for other predominant fears to be listed among the 3 most common.     

Genes,Fears, Phobias,and Phobic Disorders

It has become widely accepted that we may be biologically “prepared” to associate fear more easily with some stimuli (e.g., heights) than with other stimuli (e.g., electric outlets). The current literature on the topic of the genetics of fears and phobias is surveyed with an eye toward answering the question “What might be heritable?” For ordinary fears among the general population, heredity appears to contribute mainly to a trait of general fearfulness and may be a major reason for the strong intercorrelation among different fears. Surprisingly, the available evidence suggests little environmental transmission from parent to offspring, although adoption data have yet to be reported on this issue. Although the results of two small twin series are consistent with some genetic influence on clinically significant phobias, it is still not clear what might be genetically transmitted in these disorders. There is a strong possibility that phobic disorders may be genetically heterogeneous.     

Cultural effects on the expression of some fears by Chinese and British female students

To compare the culturally acquired aspects of fears in two different cultures, the author gave an augmented version of the I. M. Marks and A. M. Mathews Fear Scale (1979) to 50 female students in China and 49 female students in England. When the rank ordering of the fears measured in both groups was compared, the author found a high positive correlation, suggesting cross-cultural consistencies in the ranking of fearful objects. Both groups most feared social criticism and appraisal by others, followed by fears of blood, pain, and injury. The students feared least aspects related to agoraphobia. When the expressed levels of fear were compared, the Chinese students had significantly lower fear scores for many items. The reasons for those scores are discussed in terms of lower actual fear levels, moderating response sets, or socialization practices. The fears that showed no cultural differences were the ones that had early biologically relevance, such as fear of the dark and of high places. Only the socially learned fears showed cultural differences.     

Dissimulation and the sex difference in self-assessed fears: a brief note.

Since the publication of the first findings with a Fear Survey Schedule over five decades ago, there have been no published studies examining the extent of overlap of factorially-derived robust dimensions of irrational fears with social desirability or dissimulation. Due to measurement problems associated with the use of individual fear items or general fear measures, the findings reported to date are relatively meaningless. In the present study, community volunteers were administered the Fear Questionnaire and the Eysenck Personality Questionnaire-Lie scale, the correlation between both measures determined, and the influence of the Lie scores on the sex difference in self-assessed fears examined. Neither in males nor in females were Agoraphobic and Social fears significantly correlated with dissimulation. Significant associations reflecting small effect sizes were obtained in both samples between Blood-injury fears and Lie scores. Only the sex difference in Blood-injury fears was meaningfully affected by dissimulation: the usual finding of higher mean scores for females was obtained only after controlling for the influence of Lie scores. The importance of taking the research and practical implications of the findings with respect to the Blood-injury fears dimension seriously, despite the small magnitudes of the relevant data, was emphasized, as was the need for further studies in this area.