Male-female associations in the domestic guinea pig

Male courtship of nonreceptive females and male-male agonistic encounters were monitored daily for eight heterosexual groups of guinea pigs. Typically, one male (the associating male) accounted for much more courtship of a given female during her pregnancy than did any of the other males. Associating males were high ranking animals but were not always the group’s normal alpha male. Nonalpha associating males invariably ranked higher on the day of the female’s litter and postpartum estrus than their modal daily rank during her pregnancy. In 10 of the 18 cases, a nonalpha associating male took over the alpha position on the day of the litter. The courtship of females by associating males was found to differ from that by nonassociating males in that associating males displayed circling, rumping, swaying, and pursuit in a significantly higher percentage of the total number of courtship bouts.     

Attraction to mobile and immobile conspecifics

Male and female laboratory rats invariably investigate a novel conspecific placed in their home cages. In Experiment 1, mature male rats were exposed in their home cages to active and inactive juvenile males. Inactive juveniles were pretreated with haloperidol to induce behavioral stasis in a normally upright, quadrupedal stance. In repeated daily observations, males exposed to active juveniles displayed significantly longer intervals of investigation than did males exposed to inactive juveniles. In Experiment 2, mature males and females were repeatedly exposed to active and inactive castrate females. Males investigated significantly longer than did females, active female castrates were investigated significantly longer than were inactive female castrates, and sex of subject interacted significantly with activity-nonactivity of the social stimulus animal. In Experiment 3, mature males and females were repeatedly exposed to active and inactive castrate males. Males investigated significantly longer than did females, active male castrates were investigated significantly longer than were inactive male castrates, and sex of subject interacted significantly with activity-nonactivity of the social stimulus animal. The results demonstrate that sexual dimorphism in persistence of social investigation may be interpreted as a sex difference in response to normal movement cues of a stimulus complex characterizing a conspecific.     

Influences of social learning on mate-choice decisions

Evidence from both field and laboratory is consistent with the hypothesis that animals can acquire mate preferences by observing the mating behavior of others. It is difficult, however, to distinguish social learning about mates from a host of other social effects on mating that do not produce changes in preferences. Examples are drawn from laboratory studies on mate choice in female and male Japanese quail that illustrate ways in which social cues influence mating decisions. Quail of both sexes use social cues to modify their mate choices, but the sexes use the information to serve different purposes. Female quail gain preferences for males seen mating with other females, whereas males avoid females that they had observed mating with other males. This sex difference in social learning provides an example of how costs and benefits of sexual behavior can shape decision-making processes. Implications of the influence of social learning on sexual selection are briefly discussed.     

A comparison of the aversive and female attractant properties of urine from dominant and subordinate male mice

The urine of individual dominant and subordinate male mice was tested for male-aversive and female-attractant properties using dominant and subordinate male donors and Ss and estrous and anestrous female Ss in open-field tests. The results indicate (1) the presence of a factor in the urine of dominant males which proves aversive to both dominant and subordinate Ss, (2) the presence of a female attractant in the urine of dominant males, (3) naive females must be in estrous to respond positively to male urine. The results are discussed in terms of preputial and coagulating gland contents, androgen levels, and possible territorial functions.     

Open-field behavior of young chicks (Gallus gallus): Antipredatory responses,social reinstatement motivation,and gender effects

Two experiments investigating sex differences in the open-field behavior of young chicks are reported. In the first experiment, ambulation latencies of 10-day-old male and female chicks in a novel environment were measured. Half of the chicks were kept in social isolation for 2 days prior to testing; the other half were socially reared until tested. Results showed that in socially reared chicks ambulation latencies were significantly higher in males than in females, whereas in isolation-reared chicks there were no significant sex differences. In the second experiment, latencies of ambulation were measured in socially reared 10-day-old chicks placed in a novel environment with or without a visible predator (i.e., a human being). Sex differences were evident in both conditions, with males showing higher ambulation latencies than females. It is argued that sex differences in open-field behavior of chicks may be due to a stronger motivation for social reinstatement in females, which reduces the usual antipredatory reactions of chicks placed in a novel environment.     

Irrelevant cues and shape discrimination learning by cats

Experimentally naive eats learned to discriminate a pair of objects (circle and triangle) that differed in external contour, with no irrelevant cues (N = 30), with irrelevant brightness cues (N = 26), and with irrelevant size and brightness cues (N = 26). In a second experiment, naive cats were trained to discriminate bidimensional patterns (circle and triangle) with no irrelevant visual cues (N = 24) or with irrelevant size and brightness cues (N = 26). Irrelevant cues did not significantly affect the rate of shape discrimination learning in either experiment. The findings disagree with the results of several similar experiments with rats.     

Assessment: Do Males and Females make Judgements in a Self-selecting Fashion?

The article considers the reasons why females perform systematically better at school examinations than males, and why this pattern is reversed at tertiary level examinations. The possibility is considered that this is due to the exercise of an unconscious preference on the part of teachers for work done by students of their own sex. In this way, the predominance of female teachers at school level and male teachers at tertiary level is likely to favour the work of females and males respectively.     

Predicting psychopathology in six-year-olds from early social relations

113 children were seen at 1 and 6 years of age in order to examine the relationship between the quality of the early attachment relationship and later psychopathology. On the basis of scores from the Achenbach and Edelbrock Child Behavior Profile, an outcome measure of psychopathology at 6 years, the results indicated different outcomes for male and female children. For males, attachment classification at 1 year was significantly related to later psychopathology; insecurely attached males showed more psychopathology than securely attached males. No relationship between attachment and later psychopathology was observed for females. Even for males, the attachment classification only partly predicted later behavioral problems. Several other factors, including life-stress events and family demographic variables, appeared to influence the development of psychopathology. The findings suggest that although the child's attachment relationship plays an important role in the development of psychopathology, the child is neither made invulnerable by an early secure attachment nor doomed to psychopathology by an insecure attachment.     

Demonstrator influence on observer diet preference: Effects of simple exposure and the presence of a demonstrator

Previous studies in our laboratory have demonstrated that a naive rat (an observer), after interacting briefly with a previously fed conspecific (a demonstrator), will exhibit an enhanced preference for the diet its demonstrator had been fed. The present studies were undertaken to determine whether demonstrator-induced alterations in observer diet preference were the result of simple exposure of observers to diet-identifying cues emitted by demonstrators during the period of demonstrator-observer interaction. Our results indicated that observer experience of diet-related cues in the stimulus context provided by the presence of a demonstrator was sufficient to enhance observer preference for a diet, whereas simple exposure to that diet was not. We concluded that demonstrator influence on observer diet preferences was not the consequence of simple exposure of observers to demonstrator-emitted cues reflecting demonstrators’ diet.     

Sex differences in object location memory: The female advantage of immediate detection of changes

Object location memory has been considered the only spatial ability in which females display an advantage over males. We examined sex differences in long-term object location memory. After participants studied an array of objects, they were asked to recall the locations of these objects three minutes later or one week later. Results showed a female advantage only in the three-minute memory task. Additionally, we analyzed sex differences in the ability to recognize both location-exchanged and location-maintained objects. Females were superior to males at recognizing location-exchanged objects after three minutes, but not after one week. Although the one-week group's memory performance for location-exchanged objects was marginally lower, some members of that group recognized the location-maintained objects at higher levels of performance. Therefore, we concluded that the female advantage in object location memory is limited to immediate detection of changes. The relevant evolutionary theories are discussed.     

Copulatory behavior of Syrian golden hamsters in a one-male two-female test situation

Eighteen male hamsters each completed two tests of copulatory behavior: one with one female present and one with two females. Males displayed only relatively small, quantitative alterations of their typical copulatory pattern in the two-female vs. the one-female situation. All males mated with both females. Shifts between females tended to occur at predictable times-particularly after ejaculations and those long intromissions that did not immediately precede ejaculations. When mating in the two-female situation, males sired more offspring than with one female. Females in the two-female situation received less copulatory stimulation than in the one-female situation, but there were no detectable deleterious effects of this reduced stimulation on reproduction. Should copulation occur between one male and two females in the natural habitat, it would appear to be of reproductive advantage to the male, with no detriment to the female.     

Female odors evoke ultrasounds from male mice

Four experiments investigated the stimulus properties of female mice that influence ultrasound production by adult males. Female urine alone was less effective in evoking ultrasounds than was the female in male-female pairs. Visual cues were not necessary, since there was no difference in the incidence or latency of ultrasounds from male-female pairs when tested in light and dark conditions. A presently unspecified chemical cue produced by females, whose effectiveness is mediated by olfaction, was sufficient to evoke ultrasounds from male mice. The role of this chemical cue in a multimodal sequential communicative chain is discussed.     

Sex pheromones and aggressive behavior in male rats

Two experiments were performed to examine the relationships among the sexual cycle of the female, sex pheromones, and the agonistic behavior of male rats. Data suggest that the presence of an inaccessible sexually receptive female provokes increased intermale fighting. The present research investigated the possibility that a sex pheromone from the female mediates the change in male hostilities. In Experiment 1, a combination between-subject and within-subject design was used to expose half the males to the female by several sensory modalities. The other males were exposed to the female primarily by olfaction. In Experiment 2, a completely between-subject design was used to expose some males only to the soiled bedding of the female. The results suggest that olfaction is sufficient to increase the male’s aggressiveness in the presence of an estrous female, although additional sensory input, such as the female’s movements, may be necessary to produce the full aggression-inducing effect.     

Resident rats’ aggression toward intruders

A study was performed in which attacks by four different types of “resident” rat (males housed with fertile females, males housed with sterile females, paired males, and isolated males) on six different types of intruder (isolated males, grouped males, castrated males, isolated females, grouped females, and ovariectomized females) were investigated. The objective was to study features of resident and intruder rats that would allow the designing of an aggression test that used a minimum of animals and produced a rapid behavioral response. In some combinations of residents and intruders, attack was generated within a 10-min test period. Isolated resident males attacked as much as males housed with females; however, paired rats showed only low incidences of attack. The fertility of the female partner did not influence the male’s aggressiveness. Most male attacks were directed towards like-sexed intruders. Only isolated males differentiated between the different treatment types of male intruder, attacking group-housed and castrated rats less intensely than isolates. Of the females, only those that were fertile produced significant amounts of attack behavior and almost exclusively attacked female intruders. Group-housed intruder females received more attacks than isolates. The results suggest optimal conditions for generating two models of attack behavior in the laboratory rat.     

The influence of role-specific self-concept and sex-role identity on career choices in science

Despite much effort on the part of educators the number of females who choose science careers remains low. This research focuses on two factors which may be influencing females in their choice of careers. These factors are role-specific self-concept in science and self perception in terms of stereotypical masculine and feminine characteristics. In addition logical ability and mathematics and science courses were also examined as factors in career choice. Females preferring science related careers and females preferring nontraditional careers such as police, military and trades were found to have a positive role-specific self-concept and a masculine perception of themselves. Females preferring traditional careers such as teacher or hairdresser had a poor role-specific self-concept and a more feminine perception of themselves. Males as a group were found to have a more positive role-specific self-concept than females. Logical ability was also related to a science career preference for both males and females. Males expected to take more higher level math courses than females, while females preferring science careers expected to take the most higher level science courses.     

Adolescents' Age Preferences for Dating Partners: Support for an Evolutionary Model of Life-History Strategies

The tendency for women to prefer older partners, and for men to prefer younger partners, has frequently been explained in terms of socialization to American sex-role norms specifying that men must be older and more powerful than their female partners. However, recent cross-cultural data reveal this same pattern in all societies studied, a finding more in line with an evolutionary life-history model. The evolutionary model assumes that what is attractive to males is not youth, per se, but features related to fertility. This perspective leads to a hypothesis concerning the development of age preferences among adolescents: teenage males should violate the normative pattern shown in adult males and express interest in females older than themselves. 209 teenagers (103 males, 106 females) ranging in age from 12 to 19 were surveyed regarding the age limits they would find acceptable in a dating partner, as well as the age of a dating partner they would find ideally attractive. Although teenage males were willing to date girls slightly younger than themselves, they indicated a much wider range of acceptability above their own ages, and also reported that their ideally attractive partners would be several years older than themselves. Preferences of teenage females were similar in pattern to those of adult females, ranging, on average, from their own age to several years older. When combined with the consistent adult data obtained from numerous cultures, these data suggest the utility of viewing the development of sex differences in mate preference from the perspective of an evolutionary life-history model.     

The Development of Occupational Sex‐role Stereotypes,Occupational Preferences and Academic Subject Preferences in Children at Ages 8, 12 and 16

This paper reports data from a questionnaire‐based UK study aimed at examining occupational sex‐role stereotypes and occupational preferences of male and female pupils at three ages. Data were collected from 594 children in total (108 8‐year‐olds, 307 12‐year‐olds and 177 16‐year‐olds) who responded to questions that asked for their views on who (males, females or both) should perform certain occupations and how much they would like to have each of the occupations as their career. The children were also asked to indicate their favourite school subject. Analysis indicated that the youngest age group held significantly more stereotyped views regarding who should perform certain jobs than the older children and that, generally, boys sex‐typed appropriateness of occupations to a significantly greater degree than girls, although this difference was not significant in the youngest age group. Furthermore, analysis of the occupational preference ratings revealed significant differences between male and female subjects for many occupations, with higher ratings generally being awarded to stereo‐typically gender‐appropriate careers. Significant differences between the three age groups were also observed in the preference ratings for many occupations, with a tendency for the majority of occupations to be perceived less favourably with increasing age of respondent. Finally, school subject preferences were considered. No consistent or stable pattern of preference emerged for males and females across age‐groups, confirming recent suggestions that gender stereotyping of school subjects is weakening.     

Sexual excitation function of hamster vaginal secretion

Sexually naive male hamsters were paired with ovariectomized females or with castrated males. On half of the trial days, the stimulus animals were scented with vaginal secretion from estrous females, and on half of the trials they were left unscented. Added vaginal secretion resulted in an increased frequency of mounting and decreased latency to mount, and an increase in the amount of time the males remained near the stimulus animals. These results demonstrate that the vaginal secretion has attractant and sexual excitant effects on naive males and thus is a source of sex pheromones. Presence of the secretion also resulted in a decrease in some measures of agonistic behavior, suggesting anti-aggressive functions as well.

     

Asian Secondary School Students' Help-Seeking Behaviour and Preferences for Counsellor Characteristics

This study examines general help-seeking behaviours and preferences for the counsellor, characteristics of gender and ethnicity specifically, in a sample of 448 secondary school students in Singapore. The relationship between the age of the student and his/her preference for the gender and ethnicity of a counsellor was also examined. Findings indicated significant differences in preferences for the gender of the counsellor, with most females preferring a same sex counsellor and most males preferring an opposite sex counsellor. Male and female students did not differ in responses regarding preference for ethnicity of counsellor. The findings also indicated a developmental shift in perspective regarding preference for gender and for ethnicity of counsellor. Neither gender nor ethnicity of counsellor mattered to the oldest group of students. In comparison, the younger students either reported a distinct preference for gender and ethnicity of counsellor or stated they were unsure of their response. Findings from the present study that are helpful to counsellors working with an Asian secondary school population will be discussed in the light of previous research.     

Effect of Mother's Employment Status on Adolescents' Self Perceptions and Academic Performance

Existing research has not as yet demonstrated that mother's employment per se has consistent effects on adolescent perceptions and academic performance. Recent investigations have focused on the effect of mother's employment and occupational status on adolescents self assessments and school outcomes in intact families. In addition, the effect of father's occupational status on adolescent perceptions and achievements was assessed. A sample of 1675 year students (896 males and 779 females) served as subjects for this investigation.

The major results were that mother's employment outside the home was associated with low preference for science subjects among males while for females, mother's employment status was associated with high preference for mathematics subjects and a favourable attitude to doing well in school. In addition, the occupational status of mothers who did work was related to the amount of control male adolescents felt they had over events affecting their lives: boys with mothers employed in low‐status occupations tended to have more external control orientations than those with mothers employed in high‐status occupations. Also, males with mothers in low‐status occupations had lower preferences for mathematics subjects than males whose mothers were employed in high‐status occupations. However, no variables were entered into the predictive model of mother's occupational status for the female sample. Father's occupational status was also found to be associated with a number of adolescent's perceptions. Implications of these results for research into the effects of mother's employment status and mother's and father's occupational status for adolescent perceptions and performance were discussed.