Hospital influences on early infant-feeding practices.

Newborn nursery nursing staff members were surveyed to determine their attitudes and teaching practices regarding breast- and bottle-feeding. Concurrently, mothers using this nursery responded to a structured interview concerning their infant-feeding practices at 14 to 21 days postpartum and possible hospital influences on these practices. The nursing staff strongly advocated breast-feeding and did not favor specific bottle-feeding practices or products. Nursing staff counseling was generally interpreted by mothers as supporting breast-feeding, but this did not deter a large proportion of mothers who stated an initial preference for breast-feeding from introducing formula as a supplementary or exclusive form of infant feeding during the short study period. Almost all mothers doing any amount of bottle-feeding at the time of their interview were using the same formula brand and a ready-to-feed preparation used during their hospital stay. Other influences on mother's infant-feeding patterns are discussed. It is concluded that the hospital staff and routines exerted a stronger influence on mothers' infant-feeding practices by nonverbal teaching (the hospital "modeling" of infant formula products) than by verbal teaching (counseling supporting breast-feeding). Future studies might explore new ways of supporting mothers who desire to breast-feed by designing innovative hospital routines to model breast-feeding rather than feeding by infant formula.

Psychiatric disorders in the context of evolutionary biology. A functional classification of behavior.

This paper examines selected psychiatric illnesses from an evolutionary biological perspective. We present a functional classification of behavior-a classification system concerned with biological goals and behaviors which have biological consequences. The paper begins with an outline of functional views in psychiatry. This is followed by a review of the theoretical framework which serves as the basis for the classification system presented here. Biological goals are then listed and discussed. The capacity of individuals with psychiatric illnesses to achieve biological goals is reviewed briefly. Adaptive behaviors used to pursue the biologically relevant goals are then presented. The relationship between the capacity to enact adaptive behaviors and goal achievement is discussed with particular emphasis on the important role of adaptive strategies as a means of goal pursuit.

Psychiatric disorders in the context of evoolutionary biology. An ethological model of behavioral changes associated with psychiatric disorders.

This paper presents a model designed to account for behavioral changes associated with acute psychiatric illnesses. The model is developed from concepts and data presented in previous work by the authors and others and is strongly influenced by modern evolutionary theory. The model places a strong emphasis on the structural and organizational features of behavior and on testability.

Sociobiological theories of kin selection and reciprocal altruism and their relevance for psychiatry.

The revelance of sociobiology to psychiatry is examined through a consideration of the theories of kin selection and reciprocal altruism. Predictions developed from these theories are compared with currently available mental-health statistics. The theory of kin selection is used to predict a positive correlation between mental health and the existence of an active kin-support system. Similarly, the theory of reciprocal altruism is used to predict a positive correlation between mental health and the existence of an active friend-support system. The findings tend to support both sets of predictions in that individuals with access to kin-support and/or friend-support systems are less likely to be hospitalized with psychiatric disorders than are individuals without access to such systems. Sociobiology may be useful to psychiatry in that in some cases it provides: a) a new focus on the adaptive functions of human behavior which may serve to aid the psychiatrist in evaluating individual problems; b) functional predictions which may help to identify segments of the population which are more at risk for psychiatric disorders than others, thereby providing guidelines for preventive psychiatry; and c) direction for research into unexplored aspects of human social relationships and their relevance to psychiatric disorders.

Anosmia in male rhesus monkeys does not alter copulatory activity with cycling females.

Three adult male rhesus monkeys were tested daily with intact adult female partners over the course of four or five mentstrual cycles. The males were made permanently anosmic by chemical ablation of the olfactory epithelium after the second or fourth cycle was completed. All males continued to display typical cycles of copulation with their partners after the anosmia procedures, with the shortest latencies to ejaculation occurring during the periovulatory phase of the partner's ovulatory cycle. Hence, female attractivity and cyclic copulatory performance of rhesus monkeys are not dependent upon olfactory signals.