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The acoustic features of vervet monkey grunts.

East African vervet monkeys give short (125 ms), harsh-sounding grunts to each other in a variety of social situations: when approaching a dominant or subordinate member of their group, when moving into a new area of their range, or upon seeing another group. Although all these vocalizations sound similar to humans, field playback experiments have shown that the monkeys distinguish at least four different calls. Acoustic analysis reveals that grunts have an aperiodic F0, at roughly 240 Hz. Most grunts exhibit a spectral peak close to this irregular F0. Grunts may also contain a second, rising or falling frequency peak, between 550 and 900 Hz. The location and changes in these two frequency peaks are the cues most likely to be used by vervets when distinguishing different grunt types.

Acoustics↗

Agonistic interactions of captive female orang-utans with infants.

Female orang-utans with infants were pair-tested for dominance (displacement behavior) and for competitive food-getting. Dominance was quickly established in the first test for each pair, displacements were unidirectional in all tests and dominant animals obtained essentially all food incentives in 3 of the 4 series of tests. Agonistic interactions were similar in most respects to those of monkey, but were not influenced by location of testing, i.e. home cage. Aggressive behavior and food-getting were related to body weight but displacement was not. This development of dominance relationships is similar to those reported for many territorial vertebrates confined to restricted spatial conditions.

Aggression↗

The alpha female: observations on captive pigtail monkeys.

In an 11-month study, data on the establishment of dominance and grooming relations were collected over a 3-month period on an all-female pigtail monkey group. Subsequently, 3 adult males were introduced singly to the females and remained in the group for 1 month each. Data on social relations were collected to examine stability among female relationships with and without males present, and the dependence of female dominance on male support. The results revealed: (1) males were accepted into the group and attained dominance; (2) reciprocal affinitive relationships were established between each of the males and the alpha female, and (3) the alpha female's dominance status was independent of male preference for another female.

Agonistic Behavior↗

Identification and assessment of problematic interpersonal situations for urban adolescents.

Identified and developed a scale to assess problematic interpersonal situations among urban adolescents. In Study 1, problematic situations were identified by focus groups of 6th graders (N = 43). Their relevance was verified in Study 2 by assessing their reported frequency and difficulty in a sample of 6th graders (N = 457) that included mostly African American youth from low-income families. Scales representing 3 dimensions, peer provocation, perceived injustice, and environmental stressors were verified by confirmatory factor analyses. In Study 3, the internal consistency and structure of these scales were cross-validated in a sample of 7th graders (N = 459). All 3 scales were correlated with self-reported violent behavior, drug use, and anxiety and uniquely accounted for 11% to 19% of the variance. These findings have implications for identifying youth at risk for emotional and behavioral problems and for designing more relevant interventions.

Adolescent↗

Problems associated with culture contact in the psychotherapeutic setting: disparity of expectations between the western-trained therapist and the non-western patient.

Observations made in this paper are based on work with a group of lower-class French-speaking North Africans receiving treatment at a Community Mental Health Centre in Jaffo. Experience with this group revealed a fundamental disparity between patients' and therapists' expectations from therapy. Patients generally expect tangible, quick relief and regard themselves as passive recipients of a procedure: therapists hope for some form of participation on the patients' part and view treatment as a slow process. Patients' expectations appeared to derive from basic features of their personalities. It is hypothesized that members of this group are 'psychologically undifferentiated': thus, among other things, they have poorly-developed identities, lack self-direction and stereotype themselves as subordinate beings, acted upon by authority figures. The present approach differs from the usual attitude adopted towards patients of this kind since it argues that it is possible to foster independence amongst them. It is proposed that this can be done only if the patient is regarded as an active participant in the therapeutic experience and if one uses the clinical situation as a fundamental learning experience. On a more general level, it is speculated that the observations and analysis presented here are not specific to the ethnic group dealt with, but are applicable to any disadvantaged lower-class group.

Africa, Northern↗

The effect of rank order on feed intake and growth of fattening pigs.

On the basis of 120 fattening pigs, classified in 6 groups of 20 animals each, the rank order was determined and its influence on the feed intake behaviour as well as on the fattening progress was studied. The results show that with respect to the total length of stay at the trough and to the time per visit to the feeding station the dominant barrows stayed significantly longer at the feeding place than their subordinate pen mates. Additionally, they showed a higher weight at the end of the fattening period and a higher weight gain per day of fattening. As to the frequency of the visits to the feeding station there was no significant difference between high-ranking and low-ranking animals during the period of observation.

Animals↗

[Development of anhedonia under negative experience of social confrontations in male mice].

Possible development of anhedonia in male mice under chronic stress produced by social confrontations was investigated. Cheese, instead of traditional sucrose solution, was used as a positive reinforcement. It has been shown that the controls, the winners with repeated experience of aggression accompanied by victories and the losers with repeated experience of social defeats, irrespective of their social status, preferred to eat cheese, but not pellets, under the free choice conditions--80% of total food. After three days of cheese deprivation, the least food motivation and the least level of cheese consumption were observed in the losers as compared with the controls and winners. Influence of social stress as well as negative psychoemotional state produced by social defeats, on development of anhedonia as a symptom of major depression, is discussed.

Animals↗

Leadership run amok. The destructive potential of overachievers.

The desire to achieve is a major source of strength in business, and it is on the rise. The authors' consulting firm has seen a steady increase in the extent to which achievement motivates managers. There's a dark side to the trend, however. By relentlessly focusing on tasks and goals, an executive or company can damage performance. Overachievers tend to command and coerce, stifling subordinates. Psychologist David McClelland identified three drivers of behavior: achievement, meeting a standard of excellence; affiliation, maintaining close relationships; and power, having an impact on others. He said the power motive comes in two forms: personalized, in which the leader draws strength from controlling people, and socialized, where the leader derives strength from empowering people. Studies show that great charismatic leaders are highly motivated by socialized power. To look at how motives and leadership style affect a group's work climate and performance, the authors studied 21 senior managers at IBM. The leaders who created high-performing and energizing climates got more lasting results by using a broad range of styles, choosing different ones for different circumstances. Rather than order people around, they provided vision, sought buy-in and commitment, and coached. If you're an overachiever seeking to broaden your range, you can study your actions and ask your team, peers, and manager to give you honest feedback. You can adopt specific new behaviors, such as engaging your team in a discussion of how to achieve goals, rather than issuing a set of directives. The company as a whole can play a part, too: Organizations must learn when to draw on the achievement drive and when to rein it in.

Administrative Personnel↗

Behavioural elements of the paradise fish (Macropodus opercularis). II. A functional analysis.

The effects of various environmental influences, such as presence of a living predator, dominant conspecific or frightening artificial stimulus, on particular behavioural elements of the paradise fish (Macropodus opercularis) were studied. It has been found that certain sets of the elements are manifested as organizational complexes which characterize a certain mood or form of defensive behaviour. The compound elements of these complexes seemed to be partly interchangeable, partly under environmental control. The main behavioural complexes of the paradise fish were the Territorial complex characterizing the peaceful, home-living animal, Emotionality complex appearing in case of immediate and past danger, Active and Passive defense complexes which represent alternatives in defense, depending on particular stimulus settings. Some supporting evidence for these behavioural complexes are presented and discussed.

Animals↗