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PubMed1982

The effects of methadone on the social behavior and activity of the rat.

Pairs of 80-day-old female rats were given SC injections of either 0, 1, 2.5, or 4 mg/kg of methadone hydrochloride on each of 6 days. Both animals of the pair received the same dose. One hour postinjection, each pair was observed in a circular arena for a five minute period during which the following dependent measures were recorded: total time in contact, latency to initial contact, frequency of aggressive grooms, and locomotor activity. The results indicated that the rats treated with methadone spent less time in contact, took longer to contact, and aggressively groomed each other less frequently than rats treated with a saline vehicle. Also, the results suggested that the disruption of social behavior produced by methadone was not a reflection of decreased activity levels.

Aggression↗
PubMed1993

Acquisition and generalization of social behaviors in language-disabled deaf children.

In the present study, the effectiveness of a multifaceted training package on the acquisition and generalization of three social behaviors--initiating interaction, interacting with others, and turn waiting--was assessed with nine 12- and 13-year-old language-disabled deaf children. The package included (1) child training and (2) supervision, feedback, and goal-setting by teachers and residential staff members. Steps were taken to promote generality of the effects and the social validity of the procedures. Data were collected within a multiple baseline design across behaviors. Visual inspection and statistical analysis showed that instances of appropriate target behaviors increased and were generalized across settings, activities, and subjects during the training procedure and that the effects were maintained following training.

Adolescent↗
PubMed1988

Effects of modulating neonatal progestins and androgens on the development of play and other social behavior in the rat.

Rough-and-tumble play is sexually dimorphic in many species of mammals. Effects of androgen exposure on this behavior have been well documented, although the possible role of other hormones is less well known. This paper reports experiments in a series designed to investigate effects of neonatal exposure to progestins on the development of juvenile play behavior in rats. Specifically, the effects of altering levels of progestins and androgens in combination on the subsequent development of play behavior was studied, in order to investigate further the mechanism of progestogenic effects. We have previously [L. I. A. Birke and D. Sadler (1984). Physiol. Behav. 33, 217-219] reported an apparently anomalous effect of lowering endogenous progesterone using the antiserum given postnatally; this was predicted to raise levels of juvenile play. The prediction was, however, supported only for males; treated females showed lower levels of play than controls. The present study was designed to investigate these effects further, and to test hypotheses about the mode of action of neonatal progestins. Using various combinations of neonatal progestins (progesterone or medroxy-progesterone acetate, MPA), and testosterone or the antiserum to testosterone, we analyzed the amounts of play and other social behavior shown by juvenile rats. The data support a hypothesis that the previously reported effects of progestin exposure on play result from weakly androgenic actions of the progestins, which presumably compete with other androgens in males. The cellular mechanisms involved are, however, unknown.

Agonistic Behavior↗
PubMed1982

Disruption of primate social behavior by d-amphetamine and cocaine: differential antagonism by antipsychotics.

Psychostimulants lead to withdrawal from social interactions and to a decline of affective behavior in squirrel monkeys. These changes, in addition to motor stereotypies, may be related to stimulant-induced psychosis in humans. In the first of two series of experiments, 1 mg/kg d-amphetamine or 10 mg/kg cocaine, administered orally three times over 24 h to one adult male member of an established group (n = 6-9), engendered stereotyped movements of the head and hands, reduced rest postures, and greatly reduced all forms of social initiatives. Chlorpromazine (0.25-1.0 mg/kg), haloperidol (0.25, 0.5 mg/kg), and physostigmine (0.04, 0.08 mg/kg), administered before the third amphetamine or cocaine injection, blocked the motor stereotypies and hyperactivity. Chlorpromazine, haloperidol, and physostigmine did not reliably antagonize the pronounced reduction in social behavior. The second series of experiments focused on agonistic behavior in the context of resident-intruder confrontations and on affiliative behavior toward group members. d-Amphetamine (3 X 0.5 mg/kg) and, to a lesser extent, cocaine (3 X 10 mg/kg) decreased affiliative and agonistic behavior. Chlorpromazine (0.5, 1.0 mg/kg) and haloperidol (0.1, 0.25 mg/kg) did not block the severe disruption of the affiliative and agonistic behavior in amphetamine-treated monkeys; physostigmine (0.06 mg/kg) reversed the decline in time spent close to the familiar monkey in amphetamine-treated monkeys. By contrast, stimulant-induced stereotypies were effectively antagonized by chlorpromazine, haloperidol, and physostigmine. These results suggest that psychostimulant-induced changes in primate social behavior may be mediated by mechanisms other than those underlying motor stereotypies.

Animals↗
PubMed2006

Stocking density and feed barrier design affect the feeding and social behavior of dairy cattle.

The objectives of this study were to: 1) evaluate how stocking density at the feed bunk affects feeding and social behavior of dairy cows; and 2) determine if this effect is further influenced by the type of feed barrier used. Thirty-six lactating Holstein cows, allotted to 4 groups, were subjected to each of 4 stocking density treatments and 2 feed barrier treatments. Initially, 2 groups were assigned to a headlock barrier, and 2 groups to a post-and-rail barrier. Each group was then exposed to 4 stocking density treatments (0.81, 0.61, 0.41, and 0.21 m/cow, corresponding to 1.33, 1.00, 0.67, and 0.33 headlocks/cow), in 4 successive 10-d treatment periods. After these periods, the feed barriers were switched between groups and the 4 stocking density treatments were readministered. Time-lapse video was used to quantify feeding, standing, and aggressive behavior at the feed bunk. Daily feeding times were greater and duration of inactive standing in the feeding area was less when using a post-and-rail compared with a headlock feed barrier. Feeding time decreased and inactive standing increased for both barrier designs as stocking density increased at the feed bunk. Cows were displaced more often from the feeding area when the stocking density was increased, and this effect was greater for cows using the post-and-rail feed barrier. Cows ranked lower in the social hierarchy at the feed bunk were displaced more often when feeding at a post-and-rail barrier, particularly at high stocking densities. Therefore, we recommend avoiding overstocking at the feed bunk to increase feeding activity and reduce competition. Use of a barrier that provides some physical separation between adjacent cows, such as a headlock feed barrier, can be used to further reduce competition at the feed bunk.

Aggression↗
PubMed1990

[Structural analysis of social behavior in training and research. A contribution to the "functional histology" of the psychotherapy process].

To be able to identify qualitative differences in the results of psychotherapeutic activity and to establish a relationship between those results and the particularities of the treatment process involved, the problems of the patient, the relevant events during therapy, and therapeutic results must be interrelatable both terminologically and theoretically (P-T-O congruence; Strupp et al., 1989). If, therefore, the relevant qualities of the relationships involved in interpersonal transactions during the therapeutic process are to be represented adequately and independently of schools, an appropriate instrument is required for both clinical and research use. This instrument is introduced here in the form of the Structural Analysis of Social Behavior (SASB) after Lorna Smith Benjamin by means of the key question: Who acts how toward whom and how does the latter react to this?

Follow-Up Studies↗
PubMedDate not supplied

Cadmium exposure in infancy: effects on activity and social behaviors of juvenile rats.

In two experiments male and female infant rats were given single injections of cadmium chloride (0, 1, 2, 3 or 4 mg Cd/kg) on Day 5 or 6. Animals receiving the 3 and 4 mg/kg doses had high mortality rates at weaning; survivors were extremely underweight and were not used in postweaning tests. Male subjects receiving 2 mg/kg in infancy were significantly more active after weaning than littermates who had received 0 or 1 mg/kg doses, and on Day 29 they also engaged in significantly more rough and tumble play with a nontreated partner than did rats in the other groups. This effect of early cadmium exposure was also evident when males were tested with similarly treated subjects on Day 44: rats in the 2 mg/kg group had higher pinning frequencies than rats in the 0 or 1 mg/kg groups. In contrast, females in the 1 and 2 mg/kg groups did not have increased activity or rough and tumble play fighting. These data are consistent with the few correlational studies in human children which suggest changes in social behaviors associated with elevated tissue cadmium levels.

Animals↗
PubMed1980

A model for development of social behavior in vervet monkeys.

Polynomial regression was used to construct linear descriptive models for age-related behavioral changes among socially-living, captive vervet monkeys. Seventeen social acts were divided by gender into performer (director) and recipient to produce 68 predictive equation. The aptness of these models was examined by an analysis of residuals, including a lack-of-fit F test. Consistency was further validated by a sign test comparison of predicted and observed means. A log10 (Y + 1) transformation produced satisfactory fits for 51 of the 68 parameters. Only 1 behavior (male gape D) had a nonsignificant cumulative F value and low coefficient of multiple determination. Although the remaining 16 acts did show age relationships, they exhibited a significant lack of fit to the proposed model. A table of predictive equations is presented as a mathematical model of behavioral development in vervet monkeys.

Aging↗
PubMedDate not supplied

Using television to improve the social behavior of institutionalized children.

This field experiment assessed the effects of a "TV diet" composed of ten prosocial programs on the social behavior of eight-to-eighteen year old behaviorally disordered youngsters who were institutionalized in a state psychiatric facility. The influence of a post-viewing group discussion which highlighted the televised positive messages was also examined. The prosocial diet resulted in the youngsters behaving more altruistically, less verbally aggressive, and less destructively relative to those exposed to the control diet containing programs the youngsters typically viewed. The post-viewing discussion reduced the effectiveness of the prosocial programming but mitigated some of the negative effects of the control diet.

Adolescent↗
PubMed1990

Quality of prenatal care; selected social, behavioral, and biomedical factors; and birth weight.

Two hundred two poor, mainly black women were studied to assess the effects of selected social, behavioral, and biologic factors on birth weight. A path analysis was used to model hypotheses about the interrelationships among these variables. Six sociocultural factors had direct paths to quality of prenatal care: amount of insurance, delay in telling others about the pregnancy, attitudes toward health professionals, month of gestation in which the pregnancy was suspected, perception of the importance of prenatal care, and initial attitude toward the pregnancy. Together, these factors accounted for 64% of the variance in the quality of prenatal care received. Four variables had direct paths to birth weight: month in which the pregnancy was suspected, quality of prenatal care, hypertension, and substance abuse, which together accounted for 13% of the variance in birth weight. The key findings were the relative impact that the quality of prenatal care, especially the source of care, had on birth weight, and the potential for improving birth outcomes by addressing the negative effects of underlying social factors.

Attitude↗
PubMed1996

Neonatal endotoxin exposure alters the development of social behavior and the hypothalamic-pituitary-adrenal axis in selectively bred mice.

Developmental differences in the biobehavioral consequences of immune activation in early life were investigated in two lines of mice selectively bred for high and low levels of inter-male aggressive behavior. At age 5 or 6 days, male mice were administered saline or 0.05 mg/kg gram-negative bacterial endotoxin (Escherichia coli, LPS, ip). There was a transient endotoxin-induced reduction in the growth rate of the neonates in the high-aggressive line. At age 45-50 days, the animals' behaviors were assessed in a dyadic task. Hypothalami and sera were harvested 20 min later. Rates of socially reactive behaviors to conspecific contact (i.e., kick, startle) were increased in the endotoxin-treated groups from both lines. For the high-aggressive line only, endotoxin treatment increased behavioral immobility, decreased attack frequency, and decreased levels of hypothalamic corticotrophin-releasing factor (CRF). The effects of endotoxin exposure in early life on socially reactive behaviors in later life were associated with endotoxin-induced individual differences in CRF levels in the high-aggressive line but not the low-aggressive line. The findings demonstrate long-term social developmental consequences of immune activation during the neonatal period.

Aggression↗
PubMed1988

Effects of fenfluramine on social behavior in autistic children.

Deficit in social interaction is a primary component of infantile autism. However, in the majority of drug studies, social interaction has not been measured consistently over time. Therefore, we examined, in a crossover design, the effect of fenfluramine on the social interactions of seven autistic children. Social interaction was measured one to three times per week, while the children were in open placebo, placebo, or drug phases of the study. The results demonstrated that the effect of fenfluramine on social interaction was inconsistent across children, with two children possibly demonstrating a tolerance to the behavioral effects of the drug. The results are discussed with respect to genetic and pharmacologic factors.

Autistic Disorder↗
PubMed2001

Identification of a major gene regulating complex social behavior.

Colony queen number, a major feature of social organization in fire ants, is associated with worker genotypes at the gene Gp-9. We sequenced Gp-9 and found that it encodes a pheromone-binding protein, a crucial molecular component in chemical recognition of conspecifics. This suggests that differences in worker Gp-9 genotypes between social forms may cause differences in workers' abilities to recognize queens and regulate their numbers. Analyses of sequence evolution indicate that regulation of social organization by Gp-9 is conserved in South American fire ant species exhibiting social polymorphism and suggest that positive selection has driven the divergence between the alleles associated with alternate social organizations. This study demonstrates that single genes of major effect can underlie the expression of complex behaviors important in social evolution.

Alleles↗
PubMed2004

Ethics review of social, behavioral, and economic research: where should we go from here?

It is not unusual for researchers to complain about institutional review board (IRB) oversight, but social scientists have a unique set of objections to the work of ethics committees. In an effort to better understand the problems associated with ethics review of social, behavioral, and economic sciences (SBES) research, this article examinees 3 different aspects of research ethics committees: (a) the composition of review boards; (b) the guidelines used by these boards to review SBES--and in particular, behavioral health--research; and (c) the actual deliberations of IRBs. The article concludes with recommendations for changes in the review process and with suggestions for filling the gaps in knowledge about the way IRBs work.

Behavioral Research↗
PubMed2003

Peer and teacher ratings of third- and fourth-grade children's social behavior as a function of early maternal employment.

BACKGROUND: One of the more controversial issues related to maternal employment in the United States concerns the timing of entry into the workforce and its effect on children, particularly during the first year of the child's life. Some studies show deleterious effects on children, such as increases in aggression and noncompliance, while others document few negative and even positive effects of early employment. METHODS: This study examined the long-term effects of maternal employment during the child's first year of life on the social behavior of 171 third- and fourth-grade children in two-parent families. The moderating effects of child gender and social class were investigated. The extent to which stability in alternative care arrangements statistically explained links between early maternal employment and child outcomes was tested. RESULTS: After controlling for child gender, and maternal ethnicity, social class, and current employment status, third- and fourth-grade children whose mothers were employed during their first year of life evinced more acting out and less frustration tolerance and were nominated more often by peers for 'hitting' and 'being mean' than children whose mothers were not employed. There was some evidence that these associations were moderated by child gender and social class: boys, but not girls, whose mothers were employed during the first year were subsequently rated by teachers as acting out more than other children, and were also more likely to be nominated by peers for hitting. Higher nominations for hitting were only found in the working class. Finally, there was partial evidence that the number of alternative child-care arrangements during the first year accounted for the links between early maternal employment and subsequent child outcomes. CONCLUSIONS: These results are congruent with extant research that posits a risk of early employment on socioemotional development, but show that this risk is partially attributable to child-care instability.

Affect↗