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97.10国内题" r, ~- x" Q" K4 }9 Q
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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.* k8 d; C! {; `6 e7 ^
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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 intragroup aggression. Indeed, food deprivation not only failed to increase aggression but in some cases actually resulted in decreased frequencies of aggression." _, @ S. G/ }( s- j0 F" f; n4 U
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.+ R# H) n8 [/ y" H8 R% F
19 according to the author, studies such as southwick's had which of the following effects on investigators theories about monkeys' social behavior
A they suggested that existing theories about the role of aggression among monkeys did not fully account for the monkey's ability to maintain an established social order.
E they cast doubt on investigators' theories that could account for observed patterns of aggression among monkeys
红色的地方时定位点,我在A E 徘徊,A虽然写的比较大,但是好像还有道理,E除了observed不同意,其它都同意。原文就是说investigators initially believed,那里说观察了?相信=观察?这个相信很肯能是通过其他的方式得出来的,怎么会有观察?
可答案是E。求教了。A太大了我是知道,可是E明显错误啊,原文根本没说是观察得到的。
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