2. 考研
  3. Investigators of monkeys’ social behavior have always been struck by monkeys’ aggressive potential and the consequent need for s

Investigators of monkeys’ social behavior have always been struck by monkeys’ aggressive potential and the consequent need for s

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问题     Investigators of monkeys’ social behavior have always been struck by monkeys’ aggressive potential and the consequent need for social control of their aggressive behavior. Studies directed at describing aggressive behavior and the situations that elicit it, as well as the social mechanisms that control it, were therefore among the first investigations of monkeys’ social behavior.
    Investigators initially believed that monkeys would compete for any resource in the environment; hungry monkeys would fight over food, thirsty monkeys would fight over water, and, in general, any time more than one monkey in a group sought the same incentive simultaneously, a dispute would result and would be resolved through some form of aggression. However, the motivating force of competition for incentives began to be doubted when experiments like Southwick’s on the reduction of space or the withholding of food failed to produce more than temporary increases in intra-group aggression. Indeed, food deprivation not only failed to increase aggression but in some cases actually resulted in decreased frequencies of aggression.
    Studies of animals in the wild under conditions of extreme food deprivation likewise revealed that starving monkeys devoted almost all available energy to foraging, with little energy remaining for aggressive interaction. Furthermore, accumulating evidence from later studies of a variety of primate groups, for example, the study conducted by Bernstein, indicates that one of the most potent stimuli for eliciting aggression is the introduction of an intruder into an organized group. Such introductions result in far more serious aggression than that produced in any other types of experiments contrived to produce competition.
    These studies of intruders suggest that adult members of the same species introduced to one another for the first time show considerable hostility because, in the absence of a social order, one must be established to control interanimal relationships. When a single new animal is introduced into an existing social organization, the newcomer meets even more serious aggression. Whereas in the first case aggression establishes a social order, in the second case resident animals mob the intruder, thereby initially excluding the new animal from the existing social unit. The simultaneous introduction of several animals lessens the effect, if only because the group divides its attention among the multiple targets. If, however, the several animals introduced to a group constitute their own social unit, each group may fight the opposing group as a unit; but, again, no individual is subjected to mass attack, and the very cohesion of the groups precludes prolonged individual combat. The submission of the defeated group, rather than unleashing unchecked aggression on the part of the victorious group, reduces both the intensity and frequency of further attack. Monkey groups therefore see to be organized primarily to maintain their established social order rather than to engage in hostilities per se.
The passage suggests that investigators of monkeys’ social behavior have been especially interested in aggressive behavior among monkeys because______.
选项 A、aggression is the most common social behavior among monkeys
B、successful competition for incentives determines the social order in a monkey group
C、situations that elicit aggressive behavior can be studied in a laboratory
D、most monkeys are potentially aggressive, yet they live in social units that could not function without control of their aggressive impulses
答案D
解析 细节理解题。由题干中的“have been especially interested in…”可定位至原文第一段中的“have always been struck by”。原文第一段中提到“…have always been struck bymonkeys’aggressive potential and the consequent need for social control of their aggressivebehavior…aggressive behavior and the situations that elicit it，as well as the social mecha—nisms that control it…”，由此可知，研究猴子社会行为的研究人员对猴子潜在的好斗性以及随之而来的对它们好斗性行为所需要的社会控制很感兴趣。即他们研究这种好斗性行为、引发这种行为的情景以及控制这种行为的社会机制的原因是很多猴子具有潜在的攻击性，且它们生活在不控制好它们的攻击性就无法正常运行的社会体系中。因此D项正确。
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