Genetic Influence Helps Explain Variation in Human Fertility: Evidence From Recent Behavioral and Molecular Genetic Studies

To search for genetic influence on human fertility differentials appears inconsistent with past empirical research and prior interpretations of Fisher's fundamental theorem of natural selection. We discuss Fisher's theorem and give reasons why genetic influences may indeed account for individual differences in human fertility. We review recent empirical studies showing genetic influence on variance in fertility outcomes and precursors to fertility. Further, some of the genetic variance underlying fertility outcomes overlaps with that underlying fertility precursors. Findings from different cultures, different times, different levels of data, and both behavioral and molecular genetic designs lead to the same conclusion: Fertility differentials are genetically influenced, and at least part of the influence derives from behavioral precursors that are under volitional control, which are themselves genetically mediated.     

Situational social problem-solving skills and self-esteem of aggressive and nonaggressive boys

This study was designed to assess specific social problem-solving, perceived competence, and selfesteem characteristics of 20 aggressive and 18 nonaggressive boys. Significant behavioral differences existed between the groups. The problem-solving measure provided for qualitative assessment of specific problem solutions that children consider, varying according to the interpersonal context of conflicts with peers, teachers, and parents and to the level of others' intent in conflicts (ambiguous frustration and hostile provocation). In univariate analyses, aggressive children had poorer selfesteem, generated fewer verbal assertion solutions in peer conflicts and during hostile frustration, and employed more direct action solutions with teachers and during hostile frustration. Discriminant analyses significantly differentiated the two groups. Findings indicated that future research should consider the relative distribution of specific kinds of problem situations that children produce, and that situational factors in social problem-solving skills should be addressed.This paper is based on a presentation made at the American Psychological Association annual convention in Los Angeles, August 1985. Acknowledgment is made of the administrative support provided by the Durham County Schools and the Durham Community Guidance Clinic. This research was supported in part by grants from the National Institute of Mental Health and from the Research Branch of the North Carolina Division of Mental Health, Mental Retardation and Substance Abuse Services. Appreciation is expressed to the school counselors who assisted with the coordination of this research: Tom Gemmer, Patricia Kirkley, Kathy McSwain, and Geoff Wyckoff.     

Measuring grief: A short version of the perinatal grief scale

Despite a considerable number of studies, there are two major drawbacks in the literature on grief and bereavement. One is a lack of adequate and generally agreed upon measures for assessing grief. The second is a lack of ability to predict from existing measures the likelihood of what has been termed chronic or pathological grief reactions. This paper reports the results of the development of a bereavement measure for the study of perinatal loss which attempts to address these gaps. The measure is specific to a pregnancy-related loss, although it has the potential for adaptation to use for other types of loss. Analysis of responses from 138 women has resulted in the reduction of the original measure from 104 to a more manageable and almost equally comprehensive and reliable 33 items. In addition, a factor analysis has produced three factors, two of which indicate the possibility for longer-term and more severe grief reactions. Because of its sound psychometric qualities and interesting factor structure, the measure shows promise of being useful for both research and clinical purposes.This research was funded by National Institute of Child Health and Human Development Grant R01 H18431-04, with additional assistance from the Center for Social Research at Lehigh University. Dr. Potvin is supported by the Quebec Health Research Fund.     

Correlation of eye color on self-paced and reactive motor performance.

Researchers continue to examine the distinctiveness of motor performance by dark- versus light-eyed individuals. Dark-eyed individuals generally perform better at reactive type tasks (boxing, hitting a ball, defensive positions in football, rotary pursuit), while light-eyed individuals perform better at self-paced tasks (bowling, golf, pitching baseballs). Subjects performed two tasks, rotary pursuit and ball tossing (with light and dark background). Eye color (light or dark) and accuracy of performance were recorded for each subject. No significant difference was found between eye color and performance on the pursuit rotor (reactive activity). A significant difference was found between men's and women's performance in throwing a ball (self-paced activity) at a light-colored background.     

Linking empirically based theory and evaluation: The family bereavement program

Conclusion We have illustrated how our small theory (Lipsey, 1990) of bereavement guided the development and evaluation of a preventive intervention for bereaved children. Our small theory, based on prior empirical research, enabled us to identify family processes that appeared to mediate the effects of parental death on child mental health. Our intervention was designed to attempt to change these processes. The evaluation of our experimental trial of the intervention assessed changes on these processes as well as the more distal mental health outcomes. The experimental trial showed some-what encouraging results, in terms of the program's ability to modify the warmth of the parent–child relationship and to decrease symptomatology in the adolescent children. We also obtained further empirical support for our underlying theoretical model. Finally, implications for redesign of the program were derived from assessing the adequacy of the program components to change each of the mediators in the theoretical model.Support for this research was provided by NIMH grant P5OMH39246 which is gratefully acknowledged. David R. Pillow is now at Western Psychiatric Institute, Pittsburgh; Fred Rogosch is at the University of Rochester; Janette Beals is now at University of Colorado Health Sciences Center; Kim D. Reynolds is now at the University of Alabama, Birmingham; Carl Kallgren is now at the Pennsylvania State University, at Erie; and Rafael Ramirez is now at the University of Puerto Rico.     

Counselling after Stroke: An Unmet Need?

Information was gathered by means of a questionnaire survey and interviews from a group of patients (N = 17) and health professionals (N=13) working within a stroke unit, concerning the emotional needs of patients and and their relatives and how staff responded to these needs. Although most of the staff had received some training or information about counselling and felt that their interactions with patients often involved an element of counselling, there was strong support for separate specialised counselling services to deal with psychological problems suffered by both patients and their relatives. Patients rated assistance with personal and emotional worries and advice about physical problems as equally useful. A strong need for a counselling service in some form or other was expressed by patients. Neither the level of the patients' social support nor the presence or absence of aphasia, however, predicted the strength of interest expressed. It is concluded that specialised psychological help could be useful in various ways for both in- and out-patients and for their families.     

Victim to offender: A review

It has been suggested that victimization during childhood may be a primary factor in the adoption of offending behaviour during adolescence. Why is it, therefore, that the majority of child abuse victims do not become delinquent? Although empirical and theoretical evidence abounds in the victim to offender literature, the pathways responsible for vulnerability towards and protection against criminal activity have so far been unidentified. The significance of detecting these influencing factors is apparent, specifically in relation to termination of the cycle either before or after it has begun.     

Academic achievement in Blacks and Whites: Are the developmental processes similar?

Genetic and environmental influences on academic achievement were investigated in four groups of siblings: (1) White full siblings, (2) White half-siblings, (3) Black full siblings, and (4) Black half-siblings. Our expectation was that the variances and covariances among three achievement tests would have the same structure across the four groups. This expectation was confirmed by a quantitative genetic model that imposed equal factor loadings across groups. This best fitting model had two factors: a Genetic factor representing genetic variation and a Shared Environment factor representing environmental differences among families. Reading recognition, reading comprehension, and mathematics tests all loaded on the Genetic factor, but primarily mathematics loaded on the Shared Environment factor. The quantitative genetic model was next fit to the achievement test means. Its successful fit suggested that the genetic and environmental influences involved in producing individual variation were the same as those producing the group-mean differences. In this sample, genes accounted for 66% to 74% of the observed group difference in verbal achievement and 36% of the difference in mathematics achievement. Shared environment accounted for the remainder, 34% to 26% of the difference in verbal achievement and 64% of that in mathematics achievement.     

Lamarque and Olsen on Literature and Truth

In Fiction, Truth and Literature , Lamarque and Olsen argue that if a critic claims or attempts to prove that the outlook of a work of literature is true or false, he is not engaging in literary or aesthetic appreciation. This paper argues against this position by adducing cases where literary critics discuss the truth or falsity of a work's view, when their opinions are obviously relevant to the work's aesthetic assessment. The paper considers in detail the way factual errors damage a work's aesthetic standing, and shows that Lamarque and Olsen's alternative account of the role of propositional truths in literature only looks plausible because it considers a restricted range of examples. Finally, it considers the role intention, date and genre play in discussions of the aesthetic damage done by literal falsehood.