In nursing, cultural stereotyping is alive and well, but not thriving.
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Dominance-Subordination↗
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The impact of the motherhood myth on women. An approach to nursing care.
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Adult↗
Dominance hierarchy formation in juvenile crayfish procambarus clarkii
The formation of social dominance hierarchies was studied in groups of five juvenile crayfish, 1.3-1.8 cm in length. Animals were grouped together in a small, featureless aquarium after having lived in isolation for more than a month. The occurrence of each of four behavior patterns ('attack', 'approach', 'retreat' and 'escape') was recorded for each animal, together with the frequency of encounters and the frequency of wins and losses. The frequencies of wins and losses were used to calculate the relative dominance value of each animal in the group. High levels of fighting developed immediately upon grouping the animals, and a positive feedback relationship between attacking and winning enabled one animal in each group to emerge quickly as the superdominant. If that animal was the largest, it remained as the superdominant; otherwise, it was replaced as superdominant within the first few days by the largest animal. This form of dominance hierarchy, with one superdominant and four subordinates, persisted throughout the duration of the grouping. Fighting declined over the first hour and by 24 h had dropped to low levels. After the first day, approaches were used together with attacks, and retreats replaced escapes. Attack and approach were the behavior patterns displayed most frequently by animals with high dominance values, whereas retreat and escape were performed by animals of low dominance. All these trends continued to develop over the next 2 weeks as the number of agonistic encounters declined to a low level.
Journal Article↗
Schizophrenic/paranoid psychoses: determining diagnostic divisions.
Metadiagnostic guidelines are delineated for evaluating the utility of both existing diagnostic criteria and recently proposed revisions (Magaro 1980). Among the metadiagnostic guidelines are the demonstration of differential treatment-outcome relationships for different disorders and the applicability of the characteristics of a superordinate diagnosis to its subordinate (or subtype) diagnoses. The authors note the conceptual development of the schizophrenia construct. Attempts to verify the existence of subtypes of schizophrenia in psychoanalytic theory, demographic traits, psychological assessment, and behavioral research are reviewed. Data accumulated from these efforts provide evidence regarding the validity of the distinction between paranoid and nonparanoid schizophrenia proposed by Magaro (1980). The authors conclude that a number of alternate relationships between paranoid and nonparanoid subtypes may by hypothesized. Only the notion that paranoid and nonparanoid subtypes are representative of differences in severity of schizophrenia may be rejected. As yet, little evidence exists for choosing one of the remaining alternatives as correct. Integrating research from diverse fields of study is advocated in the effort to refine conceptions of psychiatric disorders. In addition to continued attempts to make improvements in psychiatric diagnosis by changing the clinical symptoms used to define disorders, refinements may be accelerated by assessing the potential utility of other sources of information as the basis for psychiatric diagnosis. Performance on tasks employed in behavioral psychopathology research may represent such an example.
Cognition↗
[Changes in lactate and succinate dehydrogenase activity in blood lymphocytes in male mice with aggressive and submissive types of behavior].
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Aggression↗
Assimilation for affiliation and contrast for control: complementary self-construals.
People have knowledge about relationships (i.e., relational schemas) that is based on their experiences. Because most people have experience with complementary behavior (interaction partners behaving similarly in terms of affiliation but oppositely in terms of control), they expect complementary behavior in their relationships. Like other beliefs about relationships, expectations of complementarity affect self-construal. The authors provide evidence for complementary self-construal; people assimilate to relevant relationship partners on the affiliation dimension and contrast on the control dimension. Consistent with the proposed role of relationship knowledge in these effects, complementary self-construal was moderated by the familiarity of the target, whether people focused on their relationship with or the appearance of the target, and whether the context was relevant for the interpersonal dimension.
Acculturation↗
Lead, age and aggression in male mice.
The impact of eleven weeks of ingestion of a 0.5% lead acetate solution on agonistic behavior of male Binghamton Heterogeneous stock mice (either 120 or 660 days of age) was examined. Similar aged mice were paired for aggression testing. Not surprisingly, younger mice, regardless of fluid history fought more vigorously than older mice. However, when mice of similar fluid history were paired together, lead ingestion decreased the latency to fight only in older mice. Regardless of their prior fighting history, when lead treated mice fought similar aged controls, the lead exposed mice in younger pairs were typically subordinate; but in older pairs, lead exposed mice were dominant. These results, coupled with extant literature concerning age-related changes in endocrine function, pituitary-adrenal activity, and lead-induced changes in hippocampal function suggest that future work directed at mechanism(s) underlying lead-induced alterations in agonistic behavior should consider life span changes in biobehavioral profiles.
Age Factors↗
Type A behavior and marital interaction: hostile-dominant responses during conflict.
Previous research has indicated that the risk conferred by men's Type A versus B behavior depends, in part, on the personality characteristics of their spouses. In the present study of 60 married couples, we found that couples consisting of two Structured Interview-defined Type A's showed a larger increase in hostile/dominant behavior during discussions of marital conflicts than did couples consisting of two Type B's or a Type A husband and a Type B wife. Couples consisting of a Type B husband and a Type A wife displayed an intermediate level of hostile dominance. These results are consistent with previous speculations about interpersonal dynamics in Type A behavior and interaction patterns which might underlie spouse effects on Type A behavior and coronary risk.
Adolescent↗
On the physiology of metazoa.
The problem on integration and control of the various processes of the metazoan organism is a major challenge to the physiologist. The traditional research strategy in dealing with the problem is neuron-oriented and its roots extend back into the last century when knowledge of hormones was lacking. In the present article, the traditional strategy is analyzed in the light of available data and its logical basis is questioned. Different levels of communication are supposed to occur in the animal or human body. Circulating hormones are responsible for the highest level of communication that occurs between organs or tissues. The central concept in the article is that regulation of circulating hormones constitutes a higher level of control relative to regulation of intercellular hormones. This is regardless of whether the latter occurs in the nervous system or elsewhere. The approach is utilized in defining the mechanism that integrates and controls the part processes of the body. The mechanism is defined as endothelial; the vascular endothelial system is the controlling part and the nervous system is one of the subordinate parts. Thanks to the new approach, meaningful biological explanations of major psychiatric disorders are now possible.
Animals↗
Costs and benefits of subordinate queens in colonies of the ant, Leptothorax gredleri.
Queens of some species of social insects form dominance hierarchies in which only the top-ranking individual reproduces. Such unequal partitioning of reproduction can be stable when subordinate queens increase their inclusive fitness indirectly by helping to rear a related dominant queen's offspring. We investigated whether subordinate queens of the ant, Leptothorax gredleri, affect the reproductive success of the dominant queen. In laboratory colonies with two queens, first eggs were laid approximately 20 days later than in colonies with a single queen, presumably due to aggressive competition among nestmate queens. Nevertheless, two-queen colonies produced on average more brood than one-queen colonies, although egg laying was completely or almost completely monopolized by one single queen. The presence of a subordinate queen therefore appears to increase the productivity of the dominant.
Aggression↗
Sympatry and allopatry in two desert ant sister species: how do Cataglyphis bicolor and C. savignyi coexist?
Two extremely morphologically similar sister species of desert ants, Cataglyphis bicolor and C. savignyi, exhibit broadly overlapping distributional ranges within Tunisia. In order to analyse the microhabitats of C. bicolor and C. savignyi within the sympatric and allopatric areas of both ant species, the plant species located at 113 different nest sites of the two ant species were determined. In the sympatric area, the two species exhibit a clear-cut nest site segregation. This is not the case in the allopatric areas. Hence the two species differentiate their microhabitat only when they are sympatric. The plant species associated mainly with the nest sites of C. bicolor indicate that this species prefers a type of vegetation that needs irrigation. This is in contrast to the nest sites of C. savignyi, which are usually found around plants that characterize typical dry steppe areas. As the ants' foraging paths recorded in the sympatric area reveal, C. bicolor performs significantly shorter foraging runs with respect to both length and time, and covers a much smaller foraging range than C. savignyi does. This result reflects the fact that the microhabitat occupied by the colonies of C. bicolor is richer in food abundance. When direct interspecific interactions were investigated by placing a bait midway between two heterospecific nests, C. bicolor foragers dominated over those of C. savignyi. The same dominance of C. bicolor over C. savignyi occurred in laboratory experiments. These results suggest that the dominant species drives the subordinate one out of the high quality microhabitats, and that the subordinate species is forced to survive in the less lucrative habitats. In conclusion, coexistence seems to be maintained by the asymmetric competitive relationship between the two species and the fact that the subordinate species has the ability to endure in the less favourable microhabitat.
Animals↗
Effects of opiate ligands on intraspecific aggression in crickets.
In the cricket Gryllus bimaculatus, the opiate antagonist naloxone, 30 microg in 50 microl into hemolymph per animal, caused a release of intraspecific aggression in male-losers and in females. Naloxone had no significant effect on the aggression of winners and isolated males. The agonist of mu-opiate receptors DAGO, 45 microg, suppressed aggression in male winners and decreased the percentage and duration of contact fights between previously isolated males. The results suggest that, during social contacts, the activity of the endogenous opioid system may contribute to suppressing aggression in subordinate males, as well as in females.
Aggression↗
Social stress differentially regulates neuroendocrine responses in laying hens: I. Genetic basis of dopamine responses under three different social conditions.
Effects of genetic-environmental interactions on plasma dopamine (DA) concentrations were studied in White Leghorn chickens selected for both high (HGPS) or low (LGPS) group productivity and survivability resulting from cannibalism and flightiness. Plasma DA levels were measured from chickens in three social treatments: single-, two-, or ten-hen cages. The two-hen treatment consisted of paired chickens from three genetic lines: HGPS, LGPS and a commercial strain, Dekalb XL (DXL). In HGPS/DXL and LGPS/DXL pairs, the DXL hen was used as a standardized genetic competitor. The ten-hen treatment contained only hens from the same line, which is similar to the original selection condition. After 7 weeks housing in the social environments, LGPS hens in the ten-hen treatment had greater plasma DA concentrations than HGPS hens (P<0.05). Compared to levels in the ten-hen treatment from the same line, plasma DA concentrations in both HGPS and LGPS hens were significantly lower in the two-hen treatment (average mean, 0.09 vs. 0.15 ng/ml and 0.22 vs. 0.44 ng/ml, P<0.05, respectively), but significantly higher in the single-hen treatment (average mean, 0.44 vs. 0.15 ng/ml and 1.78 vs. 0.44 ng/ml, P<0.05 and P<0.01, respectively). In the single-hen treatment, LGPS hens had greater plasma DA levels than HGPS hens (P<0.05). The results provide evidence of genetically related differences in the regulation of chickens' plasma DA concentrations in response to social stress. These differences may magnify the behavioral and physiological differences observed in the lines under basal and challenged conditions. These results suggest that these chicken lines may provide a new model for investigating effects of DA on the control of behavioral, neural and endocrine responses to stress.
Animals↗
Beyond artificial, sex-linked distinctions to conceptualize female sexuality: comment on Baumeister (2000)
The authors comment on three aspects of R. F. Baumeister's (2000) theoretical article on female sexuality. Questioning the predominance of nature versus cultural factors in accounting for sexual outcomes for men and women, the authors draw attention to the similarities (as opposed to differences) in the sexual attitudes, behaviors, and responses of men and women, and directly question the suggestion of "controlling" women's sexual attitudes, behaviors, responses, etc. to meet social needs for change.
Acculturation↗
Subordinate superb fairy-wrens (Malurus cyaneus) parasitize the reproductive success of attractive dominant males.
Explanations of cooperative breeding have largely focused on the indirect benefits philopatric offspring gain from investing in kin. However, recent molecular studies have revealed that in many species subordinates provision unrelated offspring. This has led to the re-evaluation of the direct and indirect benefits of helping behaviour. In this study, we used microsatellite genotyping to assess the extra-group reproductive success of subordinate superb fairy-wrens (Malurus cyaneus), a species with extremely high rates of extra-group paternity. Extra-group subordinate males sired 10.2% (193 out of 1895) of all offspring sampled between 1993 and 2000 and 21.4% (193 out of 901) of all illegitimate offspring sired by known males. The extra-group success of subordinates was greatly influenced by the attractiveness of their dominant male. Subordinates of attractive dominants sired more extra-group young than did average dominants. Evidence suggests that mate choice in superb fairy-wrens is error-prone and subordinates can gain direct reproductive benefits through parasitizing the reproductive success of attractive dominants.
Animals↗
Sex differences in scent marking in Propithecus edwardsi of Ranomafana National Park, Madagascar.
In this study we compared the scent-marking rates of females with those of males. Specifically, we examined the ability of season, dominance status, and natal status to explain the frequency of scent marking in female sifakas living wild in Ranomafana National Park, Madagascar, and compared the results with those published for males [Pochron et al., American Journal of Primatology, in press]. We also sought to determine whether vulnerability to infanticide affects marking frequency in adults of either sex, and whether female reproductive status affects female marking behavior. We found that males marked at twice the rate of females, and like males, females in single-female groups marked at the highest rates. Dominant females and non-natal females marked at higher rates than did subordinate females and natal females, a pattern also seen in males. This suggests that scent marks may convey important information about status. Neither females nor males varied their marking frequency with the presence of vulnerable infants. Females did not alter marking frequency with reproductive state, and like males, they marked at higher rates in the period prior to the mating season than they did in the mating season itself. This implies that females may use scent marks more for intrasexual aggression or territoriality than for mate attraction.
Age Factors↗
Oral contraceptive administration, interfemale relationships, and sexual behavior in Macaca fascicularis.
The effects of oral contraceptive administration on the social relationships of adult female cynomolgus monkeys (Macaca fascicularis) were examined. Ten females were administered ethinyl estradiol/ethynodiol diacetate (Demulen), 10 were administered ethinyl estradiol/norgestrel (Ovral), and 10 served as a control group. The monkeys lived in social groups of 5 females each, and patterns of social interaction and social status were recorded. Interfemale relationships were also observed when a vasectomized male was placed in each social group for 50 min, once/week. During the latter observations, preliminary data on the effects of oral contraceptive treatment on sexual interaction were also collected. In the absence of the male, interfemale agonistic interactions and time spent alone were influenced by social status but not by oral contraceptive treatment. Time spent in passive body contact, an affiliative state, was reduced by Ovral treatment. In the presence of the male, dominant females aggressively interfered with the sexual interactions of subordinates. This aggression resulted in the termination of a greater proportion of the sexual interactions of subordinates than dominants in the control group only, indicating suppression of this type of interaction by oral contraceptive treatment. Other effects included a decreased frequency of ejaculation with Ovral-treated females. These results suggest that oral contraceptives may suppress certain types of female agonistic behavior (e.g., in the context of mate competition) and some oral contraceptives may interfere with sexual activity. More broadly, these findings indicate that intrasexual competition for access to mates may occur in females as well as males.
Aggression↗
Countering bullying at an australian secondary school with students as helpers.
To counter bullying at an Australian coeducational secondary school, staff and students co-operated in developing and implementing appropriate policies and procedures. Questionnaires assessing the incidence of bullying and related attitudes were completed by students in Years 7, 9, 10 and 11 in 1995 and again in 1997. Significant reductions in levels of victimization were recorded for Year 7 students only. Significantly increased support for anti-bullying initiatives was found among senior students (Years 10 and 11). Anti-bullying activities directed and undertaken by students themselves received most approval from peers.
Adolescent↗