共查询到20条相似文献，搜索用时 31 毫秒
1.
Bennett G. Galef Brigitte Rudolf Elaine E. Whiskin Elena Choleris Marisa Mainardi Paola Valsecchi 《Learning & behavior》1998,26(4):448-454
In recent experiments in which the social influences on feeding in Mongolian gerbils were investigated, observer gerbils acquired food preferences from conspecific demonstrators only if the demonstrators and observers were either related or familiar. Even then, the effects of demonstrator gerbils on observers’ food choices lasted less than 24 h. In similar experiments with Norway rats, the familiarity/relatedness of demonstrators and observers had little effect on social learning, and the demonstrators’ influence on observers’ food choices lasted many days. We examined the causes of these differences and found that, after observer gerbils interacted with either unfamiliar or familiar conspecific demonstrators that had been fed using procedures typically used to feed demonstrator rats, they showed long-lasting social learning about foods, whereas observer rats interacting with conspecific demonstrators that had been fed as demonstrator gerbils normally are fed showed effects of familiarity/relatedness to demonstrators on their social learning about foods. Procedural differences, rather than species differences, seem to be responsible for reported inconsistencies in social learning about foods by rats and gerbils. 相似文献
2.
Naive “observer” rats that interact with conspecific “demonstrators” fed a distinctive food increase intake of the food their demonstrators have eaten. Here we found that observer rats that had interacted simultaneously with 2 demonstrator rats, 1 fed a distinctively flavored, protein-poor food, the other a distinctively flavored, protein-rich food, did not prefer the former. Similarly, observer rats ate equal amounts of two distinctively flavored foods after interacting simultaneously with 2 demonstrator rats, 1 that had consumed all food available to it, the other fed from a surplus of the second food. Last, observer rats that had interacted with both a “trustworthy” demonstrator (1 an observer had learned ate only nutritious foods) and an “untrustworthy” demonstrator (1 an observer had learned ate noxious substances) did not prefer unfamiliar foods eaten by trustworthy demonstrators to those eaten by untrustworthy demonstrators. These findings suggest limits on social information observers use in selecting foods. 相似文献
3.
Dewar G 《Learning & behavior》2004,32(1):82-89
Dietary generalists often treat new foods with caution and may rely on social cues to identify new foods that are safe to eat. However, not all generalists show the same degree of caution, nor do they all rely on social cues to the same extent. The cue reliability approach (CRA) attempts to account for this variation by quantifying the costs and benefits of sampling a new food for the first time. The experiments reported here tested predictions of the CRA, and the results suggested that rats eat more new food when asocial cues predict that new foods will prove more profitable than familiar foods. The experimental results also suggested that rats are more likely to seek out social cues when asocial cues are unreliable. 相似文献
4.
Bennetf G. Galef 《Learning & behavior》1990,18(4):347-351
Rats that (1) either ate a small sample of one or two foods (Diet A or Diet B) or interacted with a demonstrator that had eaten either Diet A or Diet B, (2) ate both Diets A and B in succession, and (3) were made ill preferred whichever of the two foods they or their respective demonstrators had eaten. Although eating a food and interacting with a demonstrator that had eaten that food were each sufficient to enhance preference for the food, eating particles of food clinging to the fur of a demonstrator was not necessary for enhancement of preference for the food that a demonstrator ate. Subjects exposed to demonstrators they could not physically contact still exhibited enhanced preference for the food that their demonstrator had eaten. The data were discussed as indicating that although smelling a diet, eating a diet, and interacting with a demonstrator that had eaten a diet can each enhance preference for that diet, it cannot be inferred that eating a food, smelling a food, and interacting with a demonstrator that has eaten a food each affect diet preference via the same process. 相似文献
5.
Wayne A. Hershberger 《Learning & behavior》1986,14(4):443-451
Forty food-deprived cockerel chicks were tested individually in a straight runway containing a familiar food cup that moved when the chicks moved. The food cup always moved in the same direction as the chick: For 20 experimental chicks it moved twice as far as the chick; for 20 control chicks it moved half as far. In Lewis Carroll’s (1898/1926) picturesque terminology, the experimental chicks were tested in Alice’s “room through the looking-glass,” in which, in order to approach the food cup, they had to “walk the other way.” Although the control chicks performed well, the experimental chicks evinced the runway behavior that characterizes positive feedback: They persistently chased the food cup away. This means that the spatial polarity of visual feedback is critical and implies that an ordinary approach response is but an automatic (closed-loop) realization of an intended visual perception. 相似文献
6.
In a three-group experiment, one group of rats (response-contingent) learned to contact a food cup for Noyes food pellets delivered according to a fixed-ratio schedule of reinforcement. Subjects in another group received a response-independent pellet each time its yoked counterpart earned one. A third (control) group received the same amount of food as the other two groups each day, but the pellets were delivered in mass. Following this training, the rats were placed in a novel experimental chamber in which all responses on a bar were reinforced with the presentation of food pellets. The results showed the response-independent animals to be slower in acquiring the barpress response than the naive control subjects, and the response-contingent subjects to be the fastest. 相似文献
7.
王悦彤 《中学英语之友(教育研究与实践)》2011,(11):6-8,47
本文是一篇说明文。垃圾越来越多,怎么办？美国加利福尼亚的阿尔塔芒特垃圾填埋场的做法是通过提取垃圾中的甲烷进行回收利用的。1．B本文谈的是“垃圾”的回收利用问题,与蔬菜、植物、树木无关。2.A句意为我们需要“考虑”一下能否从垃圾中提取点东西。3．C用it代替上句中的waste。4．B上句提出了问题,这句回答说：“答案”是……。5．A根据后面的next和then可知这是“第一条”。6．B本段讲的是垃圾场“工人”做的工作, 相似文献
8.
Three experiments were undertaken to examine the effects of interactions with demonstrator rats made ill by injection of lithium chloride (LiCl) on the later food choices of their observers. We found that (1) observer rats that had been taught an aversion to an unfamiliar diet exhibited a substantial reduction of that aversion after interacting with poisoned demonstrators that had eaten the diet to which the observers had learned an aversion, (2) exposure of an observer rat to poisoned demonstrator rats that had eaten a diet interfered with later acquisition by the observer of an aversion to the diet that the poisoned demonstrators had eaten, and (3) after interacting with poisoned demonstrators that had eaten one of two diets, observers that ate both diets and were then made ill formed an aversion to whichever diet their respective, poisoned demonstrators had not eaten. The present experiments, like previous studies both in our laboratory and elsewhere, failed to provide any evidence that naive observer rats will learn to avoid a food as a result of interacting with demonstrator rats that had eaten the food and exhibit symptoms of toxicosis. To the contrary, observer rats in the present experiments exhibited an enhanced preference for foods eaten by sick demonstrators. 相似文献
9.
To determine whether observing components of periparturitional behavior affects the manifestation of those behaviors in virgin rats, virgins selected for nonplacentophagia and for the absence of spontaneous maternal behavior toward pups were exposed to stimulus rats that were giving birth, eating donor placenta, or eating lab chow. During observations, subjects could either eat donor placenta or just see and smell it. The subjects were tested subsequently for placentophagia and for the rate of onset of pup-induced maternal behavior. The results indicated that: (1) access to placenta in the presence of other rats led to placentophagia; (2) when such placentophagia occurred in conjunction with exposure to other rats that were giving birth or eating donor placenta, the subjects became permanent placentophages (otherwise, the subjects reverted and did not eat on subsequent placentophagia tests); (3) none of the observation conditions, regardless of the availability of placenta during observation, affected the maternal sensitization latency. The results are discussed in terms of social facilitation, exposure learning, and desensitization to exteroceptive stimuli. 相似文献
10.
Following interaction with a “demonstrator” rat, an “observer” rat prefers that diet eaten by its demonstrator prior to their interaction (Galef & Wigmore, 1983). The present series of studies demonstrates that such demonstrator influence on observer diet preference can be found in: (1) first-generation laboratory bred wild rats as well as domesticated rats, (2) food-deprived as well as nondeprived observers, (3) unfamiliar as well as familiar demonstrator-observer pairs, (4) both 21-day-old and adult observers, and (5) rats selecting fluids as well as solids for ingestion. These data indicate that the social transmission of information concerning distant diets is a general and robust phenomenon, observable under a wide variety of experimental conditions. 相似文献
11.
Joseph J. Franchina Antoinette B. Dyer Stephen J. Zaccaro Allan H. Schulman 《Learning & behavior》1986,14(2):218-222
The drinking behavior of individual chicks (n = 168) was studied in two discrimination situations when the individual was alone or with an audience of merely present (not drinking) or coacting (drinking) conspecifics. In one discrimination task, a familiar and an unfamiliar drinking tube (FU) were presented simultaneously; in the other discrimination task, two unfamiliar tubes (UU) were presented. The coacting audience received a familiar and an unfamiliar tube; their familiar tube was always unfamiliar to the subject. Subjects drank more when conspecifics were present, intake being highest in the presence of coacting conspecifics. Intake was higher in the FU discrimination than in UU. However, in the UU discrimination, individuals that were tested with coactors drank most of their total intake from the tube that was similar to the coactors’ familiar tube. In the FU task, individual subjects drank mostly from their familiar tube in each social condition. However, this effect was smaller for those tested with coacting conspecifics than for those tested with merely present conspecifics. 相似文献
12.
Experiment 1 showed that laboratory-reared desert kangaroo rats, like domestic Norway rats, efficiently search for food on a radial arm maze (RAM) by avoiding revisiting arms within a trial. By placing an RAM on the floor so the animals could approach food from any direction, Experiment 2 tested whether efficient search by kangaroo rats was based on tactics of distance minimizing, central-place foraging, trail following, or meandering. In contrast to the dominant trail-following tactic of domestic Norway rats (Hoffman, Timberlake, Leffel, & Gont, 1999), kangaroo rats tended to distance minimize, whether maze arms were present or not. Experiment 3 indicated that kangaroo rats treated a floor configuration of eight food cups as twopatches of four, based on beeline travel between patches and meandering within them. We conclude that similar performance in an elevated RAM by different species can be based on different tactics, and we suggest that a laboratory apparatus can be used to cast light on niche-related mechanisms. 相似文献
13.
Adult Syrian hamster females (Mesocricetus auratus) learn to discriminate against familiar heterospecific males (Turkish hamster, M. brandti). We investigated whether females learn to avoid any heterospecific male after exposure to just one heterospecific male.
We predicted that, after being exposed to one heterospecific male, a female would avoid mating not only with that familiar
male but also with any unfamiliar heterospecific male. We exposed females to a heterospecific male across a wire-mesh barrier
for 8 days and then paired the female with (a) that same heterospecific male or (b) an unfamiliar heterospecific male. Females
exhibited lordosis faster and for a longer duration toward the unfamiliar than toward the familiar heterospecific male. However,
females were similarly aggressive toward familiar and unfamiliar heterospecific males. Perhaps exposure to stimuli from several
heterospecific males (a likely scenario in the wild) would result in females behaving similarly toward familiar and unfamiliar
heterospecific males. 相似文献
14.
Social contexts of learning literate language: The role of varied, familiar, and close peer relationships 总被引：1，自引：0，他引：1
A. D. Pellegrini Edward Melhuish Ithel Jones L. Trojanowska R. Gilden 《Learning and individual differences》2000,12(4)
Two prominent theories in evolutionary biology have stressed the role of social contexts in the evolution of primate cognition. One theory holds that cognition evolved in the context of individuals having to keep track of their interactions with a variety of conspecifics. In the other theory, cognition evolved in the contexts of familiar and close social relationships. In this paper, we present two experiments examining the effects of varied, familiar, and close social contacts on preschool children's literate language and story re-reading. We hypothesized, based on developmental evolutionary theory, that closeness, in the form of increased familiarity and friendship, would maximize children's expression of emotional terms, conflict/resolution cycles, collaborative responses, literate language, and story re-readings. In Study 1, children were exposed to one of two conditions. In the more familiar condition, initially unfamiliar children interacted with the same peer across four separate observations. In the less familiar, varied condition, a focal child interacted with a different unfamiliar peer on four separate occasions. Consistent with predictions, children in the more familiar condition increased their use of emotional terms and literate language and story re-reading with time. In Study 2, a familiar group (as defined in Study 1) was compared with children in bestfriend dyads. As predicted, friends outperformed familiar peers initially, but between-group differences decreased across time while children's performance in the familiar group increased across time. Results are discussed in terms of the role of familiarity in the evolution of cooperation and cognition. 相似文献
15.
We review socially biased learning about food and problem solving in monkeys, relying especially on studies with tufted capuchin
monkeys (Cebus apella) and callitrichid monkeys. Capuchin monkeys most effectively learn to solve a new problem when they can act jointly with
an experienced partner in a socially tolerant setting and when the problem can be solved by direct action on an object or
substrate, but they do not learn by imitation. Capuchin monkeys are motivated to eat foods, whether familiar or novel, when
they are with others that are eating, regardless of what the others are eating. Thus, social bias in learning about foods
is indirect and mediated by facilitation of feeding. In most respects, social biases in learning are similar in capuchins
and callitrichids, except that callitrichids provide more specific behavioral cues to others about the availability and palatability
of foods. Callitrichids generally are more tolerant toward group members and coordinate their activity in space and time more
closely than capuchins do. These characteristics support stronger social biases in learning in callitrichids than in capuchins
in some situations. On the other hand, callitrichids’ more limited range of manipulative behaviors, greater neophobia, and
greater sensitivity to the risk of predation restricts what these monkeys learn in comparison with capuchins. We suggest that
socially biased learning is always the collective outcome of interacting physical, social, and individual factors, and that
differences across populations and species in social bias in learning reflect variations in all these dimensions. Progress
in understanding socially biased learning in nonhuman species will be aided by the development of appropriately detailed models
of the richly interconnected processes affecting learning. 相似文献
16.
Maternal Socialization of Children''s Eating Habits: Strategies Used by Obese Mexican-American Mothers 总被引：4，自引：0，他引：4
Mexican-Americans are more likely to be obese than the general population, yet little research has been conducted on the socialization of eating habits in Mexican-American children. 38 obese mothers enrolled in a weight-loss program and their 4-8-year-old children were observed during mealtime and the mothers interviewed about their socialization practices. Mothers relied primarily on nondirective verbal control strategies during the observation. Child compliance was more likely to follow a maternal serving or command than a nondirective behavior. Mothers encouraged sons to eat more than did mothers of girls. Child age was negatively correlated with mother's use of commands, reasoning, threats, and bribes, and positively correlated with maternal nondirectives, servings, and child compliance. Mothers with more years of formal education served healthier foods and were more likely to report using reasoning strategies, prohibiting consumption of unhealthy food, monitoring child food consumption away from home, and allowing child input into the eating situation than were less educated mothers. 相似文献
17.
Consumption of food pellets was examined in four water-deprived rats during 1-h sessions in which water was presented once every 30, 60, or 120 sec independently of the rats’ behavior according to three fixed-time (FT) schedules. Correlated with each FT condition was a continuous reinforcement (CRF) control condition in which the rats received, at the start of the session, the number of dipper presentations that were programmed to occur during the corresponding FT condition. During both the FT and CRF conditions, pellets per dipper presentation decreased and food intake rate increased with rate of water presentation, and there was a direct linear relation between log food intake and log water intake. For each of these three measures there was less eating under the FT condition than under the CRF condition, but the difference between the FT and CRF functions decreased at shorter FT values. These data are discussed in terms of the effects of amount of water on food consumption and the principle of temporal summation. 相似文献
18.
In two experiments with goldfish patterned after work with rats, consummatory responding for a less preferred food (adulterated with quinine) was measured in subjects that did or did not have previous experience of a preferred (unadulterated) food. The result in each case was not the negative contrast found in rats, but the opposite—more responding in subjects with experience of both foods. The experiments are in accord with a variety of others that have failed to show control of performance by remembered reward in goldfish. 相似文献
19.
Georgia D. Wills Frank R. Moore Andrea L. Wesley Barry Friedman 《Learning & behavior》1984,12(1):106-108
The present experiment investigated the effects of kinship and familiarity upon food sharing in pairs of albino rat pups. Five pairs of rats from each of the following groups were tested: (1) familiar siblings, (2) nonfamiliar siblings, (3) familiar nonsiblings, and (4) nonfamiliar non-siblings. A small food portion was used, necessitating not only close physical contact, but also cooperation in the sense that both pups were required to remain relatively immobile in order for both to feed simultaneously. Results indicated more frequent sharing among unfamiliar pups, whether related or not. Results also indicated that food sharing increased in frequency among all four groups over the 5-day testing period, suggesting that cooperation in the form of food sharing can develop, or increase in frequency, over time in albino rat pups. 相似文献
20.
《Educational Philosophy and Theory》2013,45(3):323-334
The article explores the need to eat as a biological and social practice among children in a preschool in Norway. The children in this preschool are aged from one to two years of age, and some of them have just started there. Different events from mealtimes relate to Derrida's concept of touch and Grosz's notion of bodies in‐place and out‐of‐place. How food touches the children and the practitioners is further discussed through a consideration of body/place relations, which are both material and reflect pedagogical discourses. Its overall context is not only touching the food in a concrete sense, but also food as touch seen as a philosophical concept. Analyzing touching relations around the table including movements in materiality, bodies and discourses of eating may empower the youngest children in a preschool setting. 相似文献