Shared genes, shared experiences, and similarity of personality: data from 14,288 adult Finnish co-twins

Similarities for Extraversion (E) and Neuroticism (N) scale scores from the Eysenck Personality Inventory were evaluated in 7,144 adult twin pairs, drawn from the population-based Finnish Twin Cohort, as a function of the co-twins' genetic resemblance, gender, age, and the frequency of their social interaction with each other. To separate effects of shared genes from those of shared experience, we performed hierarchical multiple regressions of double-entry data matrices. Results establish the predictive significance of both genetic and experiential influences: Genetic effects remained significant when tested after the effects of social contact were first removed; conversely, for N scores, the effects of social contact remained significant when assessed after genetic influences were first removed. These findings establish genetic variance in major dimensions of adult personality but assign a significant role to common experience as well. The first finding constructively replicates reports by others; the second challenges the widespread assumption that shared experiences have a negligible impact on sibling similarity in adult personality.     

Coping skill training in groups

Though similar to traditional group psychotherapy in many respects, a coping skill training approach differs principally in several areas and technically in many more. Coping skill training group therapy tends to employ many concrete intervention strategies to enhance various aspects of process, drawing on ongoing data to evaluate group interaction and individual responses. The approach draws more heavily on cognitive, modeling, reinforcement, and problem-solving procedures to achieve specifically determined goals, and it depends less on interpretive and confrontative methods. The author discusses a wide range of techniques to show the benefits of this approach.     

Psychogeriatric management and sectorized psychiatry

Together with a general assessment of gerontopsychiatric care in the Federal Republic of Germany, the paper presents a model in hospitalised gerontopsychiatric treatment that has been tested at Hanover College of Medical Studies (Medizinische Hochschule Hanover). Results presented cover a wide range of divergent disorders, and appear to justify the employment of the model elsewhere.     

Taste,odor, and tactile discrimination before and after smoking

Differential sensitivity was measured before and after smoking a cigarette by seven smokers, using six non-smokers as controls. Stimuli consisted of the tastes of sucrose, sodium chloride, citric acid, caffeine, and quinine hydrochloride; the odors of vanillin and 2-butanone; and the viscosity produced by a carrageenan gum. No significant jnds were observed between smokers and non-smokers, nor before vs after smoking. Therefore, the data supported neither longterm nor short-term influences of cigarette smoking. Practice effects were noted among the control group, as more correct responses were obtained on the second than on the first set of solutions in most of the test stimuli.     

Psychosocial Responses of Hospital Workers to Acquired Immune Deficiency Syndrome (AIDS)1

To assess the psychosocial responses of hospital workers to acquired immune deficiency syndrome (AIDS), 237 hospital employees were interviewed. Information was obtained on frequency and nature of contact with AIDS patients; knowledge about AIDS; attitudes about AIDS and about homosexuality; and stresses related to AIDS care. Four indices were developed: AIDS-Contact, AIDS-Phobia, Homophobia, and AIDS-Stress. Misperceptions and fears about AIDS, as well as negative attitudes about individuals with the disease, were common. AIDS-Phobia was positively correlated with Homophobia and AIDS-Stress. AIDS-Phobia and AIDS-Stress were negatively correlated with AIDS-Contact. More patient contact was associated with lower levels of perceived stress, except for those with frequent but impersonal patient contact. Strategies for educational programs based on results are proposed.     

Same- and cross-sex friendships and the psychology of homosociality

The present study investigated the homosocial preferences and the functions, formation, and maintenance characteristics of same- and cross-sex friendships for a sample of 90 young adults, ages 20 to 28 years. Single women and married participants of both sexes evidenced a definite preference for same-sex friendships. The expectations associated with same-sex friendship functioning were found to be similar for both sexes. Cross-sex friendships were reported by both women and men as providing less help and loyalty than same-sex relationships. Otherwise, cross-sex friendship functioning was described by men as closely resembling same-sex friendships, but women reported cross-sex relations as providing less acceptance, less intimacy, and more companionship than same-sex ones. Friendship formation and maintenance for same- and cross-sex friendships were also found to differ significantly. The results are discussed in terms of Lipman-Blumen's [In M. Blaxall & B. Reagan (Eds.), Women and the workplace. Chicago: University of Chicago Press, 1976, pp. 15–32] theory of homosociality.This article is based on a paper presented at the American Psychological Association, 88th Annual Convention, Montreal, Canada, September 1980.