Directional responses to sounds in young gerbils (Meriones unguiculatus)

Three experiments were conducted to determine the ability of infant gerbils to approach an auditory stimulus. In the first experiment, gerbil pups, 16-23 days of age, were tested in a circular apparatus with a central start area and a movable sound source located at one of eight positions around the perimeter. Stimuli included high- and low-intensity presentations of a tape-recorded gerbil social call, a broad-band white noise stimulus, and a no-stimulus control condition. The subjects showed a strong tendency to approach the low-intensity social call and a less pronounced tendency to approach the white noise. In the second experiment, gerbil pups were tested in the same apparatus with or without ear blocks to determine the role of binaural cues in directional approach responding. The tendency to approach a low-intensity vocalization was disrupted by obstruction of one ear but not by blocking both ears. Thus, binaural balance was shown to be important for early sound localization. In the third experiment, the tendency to approach a social call was compared at different ages, 12-15, 16-19, 20-23, and 24-27 days after birth. Approach responses were first seen at 16-19 days. The responses continued during the 20-23-day period but began to wane at 24-27 days of age.     

Public approval of suicide: a situational analysis

Using four national surveys conducted in 1977, 1978, 1982, and 1983, this study examined public opinions on suicide in four situations: incurable disease, bankruptcy, family dishonor, and being tired of living. The results indicated that suicide in case of incurable disease was approved by slightly less than 43%, being tired of living by about 13%, and the other two situations by 7%. It was found that respondents with attributes of higher education, lower religiosity, and higher commitment to freedom of expression were more likely to consider suicide as acceptable. Future implications for research suggest not only an assessment of attitudes toward suicide in different situational contexts, but also assessment of individual intentions for the situations considered in this study.     

Masculinity and femininity: The role of desirability in the relationships among measures based on self-concept and personality traits

With data gathered from 96 female college students, intercorrelations were examined among self-concept ratings of masculinity and femininity, and scales from two personality-trait measures of masculinity and femininity—the Adjective Check List (ACL) and the Extended Personal Attributes Questionnaire (EPAQ). The sign and magnitude of the correlations between pairs of measures were successfully predicted on the basis of the congruence between measures of both the gender relevance and the desirability of the self-rated traits comprising each measure. The desirability of the trait items employed in self-report personality-trait scales of masculinity and femininity evidently introduces methods variance that can either inhibit or potentiate the relationship with other scales composed predominantly of either desirable or undesirable traits. When balanced for the desirability of trait items, personality-trait scores of masculinity and femininity were substantially inversely correlated with each other, and only marginally correlated with self-concept ratings of masculinity and femininity, but these correlations remained in the anticipated directions. This result is consistent with the findings of Pedhazur and Tetenbaum (“Bem Sex Role Inventory: A Theoretical and Methodological Critique,” Journal of Personality and Social Psychology, 1979, 37, 996–1016), and supports Spence's (Masculinity, Femininity, and Gender-Related Traits: A Conceptual Analysis and Critique of Current Research,” In B. A. Maher and W. B. Maher (Eds.), Progress in Experimental Research, Vol. XIII, Normal Personality Processes, New York: Academic Press, 1984) position that personality traits should be viewed as only one of many possible referents for gender/sex role identity.     

Personality and loneliness

The relationship between Eysenck's major personality factors and responses to the Revised UCLA Loneliness Scale were examined. E was related to loneliness for both males and females. Females also showed a moderately high correlation between N and loneliness. Regression analyses indicated a substantially stronger relationship between the Eysenck factors and loneliness for females than males.     

Correlates and predictors of hyperactivity and aggression: A longitudinal study of parent-referred problem preschoolers

Forty-six parent-referred problem 3-year-olds and 22 comparison children were assessed with parent report and observational measures; 54 were followed up at age 4, and 53 were followed again at age 6. Lower social class and greater family stress were associated with higher symptom ratings at initial referral and age 6 follow-up. Negative and directive maternal behavior and negative and noncompliant child behavior observed in the lab at age 3 were associated with higher maternal ratings of child aggression and hyperactivity; these observed behaviors continued to be highly predictive of maternal ratings of persistent problems at ages 4 and 6. A laboratory index of inattention and overactivity at intake also predicted hyperactivity ratings at age 6. These findings suggest that externalizing problems identified in early childhood are likely to persist when they are associated with more family disruption and a negative mother-child relationship.This research was supported by Grant No. MH 32735 from the National Institute of Mental Health to Dr. Campbell. We are indebted to the children and families who have participated so enthusiastically in this study over the past 5 years. The help of Deborah Baldwin, Patricia Cluss, and Diane Gluck is gratefully acknowledged. Many additional people participated in various phases of this study as independent observers and data coders. Their contributions are also recognized.