伙伴选择对合作行为的影响作用与机制

伙伴选择是指个体根据其他个体能否给自己带来获益而选择或拒绝与他们建立伙伴关系的行为。伙伴选择对合作行为具有非常重要的影响, 表现为：个体只要有离开或自主选择伙伴的机会即可促进合作; 若能了解到伙伴的行为或特质层面的信息, 则可以进一步促进合作。基于目前研究, 伙伴选择主要可能通过4种具体机制促进合作行为, 即离开或拒斥的惩罚机制, 寻求合作者的奖赏机制, 分类匹配机制以及生物市场中的竞争机制。未来还需要从厘清伙伴选择的概念, 提升研究的生态效度, 深入探索其促进合作的内在机制, 尝试用伙伴选择解决伙伴控制条件下的合作问题, 以及探索中国文化背景下的伙伴选择与合作等方面开展进一步研究。     

When is your partner willing to help you? The role of daily goal conflict and perceived gratitude

Motivation to provide help might vary from day-to-day. Previous research showed that autonomously motivated help (i.e., helping because you enjoy/value this behavior), compared with controlled motivated help (i.e., helping because you feel you should do so), has beneficial effects for both the help provider and recipient. In a sample of chronic pain patients and partners (N?=?64 dyads), this diary study examined whether (1) same- and prior day perceived gratitude (i.e., received appreciation for providing support) in partners and (2) same- and prior day goal conflicts in partners (i.e., amount of interference between helping one’s partner in pain and other goals) predicted partners’ helping motivation. Partners provided more autonomously motivated help on days that they perceived more gratitude from their partner and when they experienced less goal conflicts. Lagged analyses indicated that perceived gratitude (but not goal conflict) even predicted an increase in autonomous helping motivation the next day. Implications are discussed in the context of Self-Determination Theory.     

Development of self-recognition in chimpanzees (Pan troglodytes).

Chimpanzees (Pan troglodytes) demonstrate the ability to recognize themselves in mirrors, yet investigations of the development of self-recognition in chimpanzees are sparse. Twelve young chimpanzees, grouped by age, were given mirror exposure and tested for self-recognition and contingent movement. All 6 juveniles, 4 and 5 years old, exhibited mirror-guided, mark-directed behavior and clear evidence of self-recognition. In contrast, among the infants, only the oldest group of 2 1/2-year-olds exhibited clear evidence of self-recognition. All chimpanzees exhibited both self-directed behaviors and contingent movements. These results suggest that self-recognition occurs at a slightly older age in chimpanzees than in human infants. In humans, self-recognition is linked with other cognitive abilities. The results conform to the general pattern that great apes exhibit many cognitive skills comparable to those of 2-year-old humans.     

Donor payoffs and other-regarding preferences in cotton-top tamarins (Saguinus oedipus)

Helping others at no cost to oneself is a simple way to demonstrate other-regarding preferences. Yet, primates exhibit mixed results for other-regarding preferences: chimpanzees and tamarins do not show these effects, whereas capuchin monkeys and marmosets preferentially give food to others. One factor of relevance to this no-cost food donation is the payoff to the donor. Though donors always receive the same payoffs regardless of their choice, previous work varies in whether they receive either a food reward or no food reward. Here, I tested cotton-top tamarins in a preferential giving task. Subjects could choose from two tools, one of which delivered food to a partner in an adjacent cage and the other of which delivered food to an empty cage. Thus, subjects could preferentially give or withhold food from a partner. I varied whether subjects received food payoffs, whether a partner was present or absent, and whether the partner was a non-cagemate or the subject’s mate. Results showed that the subjects’ overall motivation to pull either tool declined when they did not receive any food. Additionally, they did not preferentially donate or withhold food, regardless of their own payoff or their relationship with the partner. Thus, cotton-top tamarins do not take advantage of cost-free food giving, either when they might gain in the future (mates) or when they have no opportunity for future interactions (non-cagemates).     

Interpersonal consequences of social anxiety

The behavioral manifestations of social anxiety may have implications for social outcomes. Unfortunately, little is known about how anxiety shapes social interaction. The present study examined social interactions in dyads consisting of either 2 nonsocially anxious (NSA) individuals or 1 socially anxious (SA) and 1 NSA individual. Behavior, self-reported affect, and perceptions were examined. In comparison with the interactions of NSA pairs, high levels of fidgeting, poor reciprocity of smiling behavior, more self-talk, and more frequent reassurance seeking and giving characterized interactions between SA and NSA participants. Both SA participants and their NSA partners rated their interactions as being less smooth and coordinated than did participants in NSA-NSA dyads. In addition, SA participants' reassurance seeking and self-talk correlated negatively with partner positive affect and perceptions of interaction quality. The authors discuss self-focused attention and the interpersonal consequences of social anxiety.     

Chimpanzees (Pan troglodytes) transfer tokens repeatedly with a partner to accumulate rewards in a self-control task

There has been extensive research investigating self-control in humans and nonhuman animals, yet we know surprisingly little about how one’s social environment influences self-control. The present study examined the self-control of chimpanzees in a task that required active engagement with conspecifics. The task consisted of transferring a token back and forth with a partner animal in order to accumulate food rewards, one item per token transfer. Self-control was required because at any point in the trial, either chimpanzee could obtain their accumulated rewards, but doing so discontinued the food accumulation and ended the trial for both individuals. Chimpanzees readily engaged the task and accumulated the majority of available rewards before ending each trial, and they did so across a number of conditions that varied the identity of the partner, the presence/absence of the experimenter, and the means by which they could obtain rewards. A second experiment examined chimpanzees’ self-control when given the choice between immediately available food items and a potentially larger amount of rewards that could be obtained by engaging the token transfer task with a partner. Chimpanzees were flexible in their decision-making in this test, typically choosing the option representing the largest amount of food, even if it involved delayed accumulation of the rewards via the token transfer task. These results demonstrate that chimpanzees can exhibit self-control in situations involving social interactions, and they encourage further research into this important aspect of the self-control scenario.     

Altruistic behavior and cooperation: The role of intrinsic expectation when reputational information is incomplete

Altruistic behavior is known to be conditional on the level of altruism of others. However, people often have no information, or incomplete information, about the altruistic reputation of others, for example when the reputation was obtained in a different social or economic context. As a consequence, they have to estimate the other's altruistic intentions. Using an economic game, we showed that without reputational information people have intrinsic expectations about the altruistic behavior of others, which largely explained their own altruistic behavior. This implies that when no information is available, intrinsic expectations can be as powerful a driver of altruistic behavior as actual knowledge about other people's reputation. Two strategies appeared to co-exist in our study population: participants who expected others to be altruistic and acted even more altruistically themselves, while other participants had low expected altruism scores and acted even less altruistically than they expected others to do. We also found evidence that generosity in economic games translates into benefits for other social contexts: a reputation of financial generosity increased the attractiveness of partners in a social cooperative game. This result implies that in situations with incomplete information, the fitness effects of indirect reciprocity are cumulative across different social contexts.     

Monkeys fail to reciprocate in an exchange task

Exchanges form the basis of human economies. Animals too can engage in reciprocal interactions but they do not barter goods like humans, which raises the question of the abilities necessary for trading to occur. Previous studies have shown that non-human primates can exchange food with human partners. Here, we tested the ability of brown capuchin monkeys and Tonkean macaques to reciprocate in a task requiring two conspecifics to exchange tokens in order to obtain rewards from an experimenter. We recorded 56 transfers between subjects in capuchin monkeys and 10 in Tonkean macaques. All transfers were passive in both species. Capuchins preferentially picked up tokens valuable for them in the partner’s compartment. They tended to manipulate the partner-valued tokens more often than the no-value ones, leading to more opportunities for these tokens to end up within reach of the partner. Despite optimal conditions where values of goods were defined and known by partners, however, none of the pairs tested engaged in short-term reciprocal interactions. These results indicate that calculated reciprocity was difficult if not impossible in the animals tested.     

Adult attachment and dating strategies: How do insecure people attract mates?

When asked to choose among secure or insecurely attached partner prototypes, research shows that people tend to select secure individuals as their first choice. Despite this pattern, not everyone chooses secure partners in reality. The goal of this study was to examine the ways in which insecure individuals present themselves that might make them attractive to others. To achieve this goal, participants were led to believe that they were interacting with a possible date. That insecure individuals presented themselves as warm, engaging, and humorous people when communicating with potential mates were found. These findings suggest that insecure people have numerous dating tactics and positive qualities that they display to win over romantic partners.     

Gender,negative affectivity,and observed social support behavior in marital interaction

Most prior research on social support in close relationships examines perceptions of support, failing to capture fully the helping behaviors that partners exchange while interacting. We observed 60 newly married couples each engage in two 10-minute interactions. with one spouse (the helper) responding while the partner (the helper) discussed a personal characteristic or problem that he or she wanted to change. Helper and helper behaviors were coded and examined in relation to gender and negative affectivity, which have been linked in prior research to perceptions of support. Husbands and wives did not differ in helper behaviors, but wives displayed more negative helper behavior than did husbands. Helper and helper behavior covaried with negative affectivity in expected directions, and helper behavior covaried with the partner's negative affectivity. Finally, analysis of negative reciprocity sequences showed that, as helpers, husbands were more likely to reciprocate negative behavior, and to have their negative behavior reciprocated, to the extent that they were high in negative affectivity. We emphasize the value of observational data in understanding social support in marriage, we discuss the implications of the findings in terms of prevailing beliefs about gender and social support, and we outline the specific links between negative affectivity and observed support behavior in marriage.     

Deceptive-like behaviour in dogs (<Emphasis Type="Italic">Canis familiaris</Emphasis>)

Deception, the use of false signals to modify the behaviour of the receiver, occurs in low frequencies even in stable signalling systems. For example, it can be advantageous for subordinate individuals to deceive in competitive situations. We investigated in a three-way choice task whether dogs are able to mislead a human competitor, i.e. if they are capable of tactical deception. During training, dogs experienced the role of their owner, as always being cooperative, and two unfamiliar humans, one acting ‘cooperatively’ by giving food and the other being ‘competitive’ and keeping the food for themselves. During the test, the dog had the options to lead one of these partners to one of the three potential food locations: one contained a favoured food item, the other a non-preferred food item and the third remained empty. After having led one of the partners, the dog always had the possibility of leading its cooperative owner to one of the food locations. Therefore, a dog would have a direct benefit from misleading the competitive partner since it would then get another chance to receive the preferred food from the owner. On the first test day, the dogs led the cooperative partner to the preferred food box more often than expected by chance and more often than the competitive partner. On the second day, they even led the competitive partner less often to the preferred food than expected by chance and more often to the empty box than the cooperative partner. These results show that dogs distinguished between the cooperative and the competitive partner, and indicate the flexibility of dogs to adjust their behaviour and that they are able to use tactical deception.     

Kinship and altruism: A cross‐cultural experimental study

Humans are characterized by an unusual level of prosociality. Despite this, considerable indirect evidence suggests that biological kinship plays an important role in altruistic behaviour. All previous reports of the influence of kin selection on human altruism have, however, used correlational (rather than experimental) designs, or imposed only a hypothetical or negligible time cost on participants. Since these research designs fail either to control for confounding variables or to meet the criteria required as a test of Hamilton's rule for kin selection (that the altruist pays a true cost), they fail to establish unequivocally whether kin selection plays a role. We show that individuals from two different cultures behave in accordance with Hamilton's rule by acting more altruistically (imposing a higher physical cost upon themselves) towards more closely related individuals. Three possible sources of confound were ruled out: generational effects, sexual attraction and reciprocity. Performance on the task however did not exhibit a perfect linear relationship with relatedness, which might reflect either the intrusion of other variables (e.g. cultural differences in the way kinship is costed) or that our behavioural measure is insufficiently sensitive to fine‐tuned differences in the way individuals view their social world. These findings provide the first unequivocal experimental evidence that kinship plays a role in moderating altruistic behaviour. Kinship thus represents a baseline against which individuals pitch other criteria (including reciprocity, prosociality, obligation and a moral sense) when deciding how to behave towards others.     

“One of us”: Outstanding willingness to help save a single identified compatriot

Willingness to help victims unrelated to oneself, in situations where reciprocity is irrelevant, is a common form of altruism. Prior research showed that people are more willing to extend such help when the victims are identified, particularly when the target of help is a single individual. However, in the present research we found that only when the perceivers regard the victims as belonging to their own in-group, willingness to help a single identified individual is greater than willingness to help a group of individuals: identifying tsunami victims by name increased actual contributions only when the specified target was a single compatriot. The role of perceived shared social group in promoting the victim singularity advantage in contributions was mirrored in ratings of emotions, thus supporting an affective account of helping behavior.     

Altruism and the Experimental Data on Helping Behavior

Philosophical accounts of altruism that purport to explain helping behavior are vulnerable to empirical falsification. John Campbell argues that the Good Samaritan study adds to a growing body of evidence that helping behavior is not best explained by appeal to altruism, thus jeopardizing those accounts. I propose that philosophical accounts of altruism can be empirically challenged only if it is shown that altruistic motivations are undermined by normative conflict in the agent, and that the relevant studies do not provide this sort of evidence. Non-normative, purely causal, psychological factors would be empirically relevant only if the notion of altruism is broadened to include the requirement that one recognize certain situations as calling for altruism. But even in that case, the relevant studies are not designed in such a way that could threaten philosophical theories of altruism.     

How sweet it is to be loved by you: the role of perceived regard in the terror management of close relationships

Drawing from terror management theory, the present research examined whether people turn to close relationships to manage the awareness of mortality because they serve as a source of perceived regard. Studies 1 and 2 demonstrated that mortality salience (MS) leads people to exaggerate how positively their romantic partners see them and demonstrated that people are more committed to their partners to the extent that their romantic partners serve as a source of perceived regard after MS (Study 3). Study 4 revealed that activating thoughts of perceived regard from a partner in response to MS reduced death-thought accessibility. Studies 5 and 6 demonstrated that MS led high relationship contingent self-esteem individuals to exaggerate perceived regard from a partner, and this heightened regard led to greater commitment to one's partner. Study 7 examined attachment style differences and found that after MS, anxious individuals exaggerated how positively their parents see them, whereas secure individuals exaggerated how positively their romantic partners see them. Together, the present results suggest that perceptions of regard play an important role in why people pursue close relationships in the face of existential concerns.     

Toward an Understanding of “The Sex Game”: The Effects of Gender and Self-Monitoring on Perceptions of Sexuality and Likability in Initial Interactions1

Results of several studies indicate that men attribute more sexual meaning to heterosexual interactions than do women. Based on Abbey's (1982) findings, we hypothesized that males, in comparison to females, would attribute more sexuality to opposite-sex partners. Based on findings from several self-monitoring dating studies, we predicted that high self-monitors would rate their partners and themselves higher on sexuality and likability traits than would low self-monitors. A laboratory study was conducted in which mixed-sex pairs of participants discussed their likes and dislikes about college life. Participants then rated themselves and their opposite-sex partners on a set of sexuality and likability trait adjectives and indicated their interest in getting to know their partner better. Results supported the gender hypotheses, whereas they only partially supported the self-monitoring predictions. The self-monitoring effects on self-ratings of sexuality and partner ratings of likability are used to explain why high self-monitors are more successful than low self-monitors in establishing heterosexual relationships.     

AN ANALYSIS OF AND INTERVENTION IN THE SEXUAL TRANSMISSION OF DISEASE

Sexually transmitted diseases are a serious threat to the public health. Indeed, when an individual seeks medical treatment for a sexually transmitted disease, health authorities frequently attempt to identify, procure, and treat that individual's sexual contact(s). We conducted a comparative analysis of three alternative approaches to tracing the sexual partners of individuals diagnosed as having a sexually transmitted disease. The first approach involved counseling individuals (n = 27) infected with either gonorrhea or nongonococcal urethritis and exhorting them to procure their sexual partners for treatment. In addition to counseling, the second and third approaches involved distributing “occasion cards” for patients to use when informing sexual contacts of the need for treatment. Moreover, in the second approach, the counselor (a nurse or physician) informed infected patients (n = 19) that they and their partners could waive the $3 clinic fee contingent upon the partners seeking treatment within 1 week. In the third approach, the counselor asked infected persons (n = 19) to accept a follow-up telephone contact if their sexual partners failed to seek treatment within 1 week. The third approach was most effective. Ninety percent of the partners identified through this approach sought treatment, versus only about 60% of the partners in the other two conditions. The third approach was also the least expensive, costing about $2.95 to procure each partner for treatment.     

Social comparison mediates chimpanzees’ responses to loss,not frustration

Why do chimpanzees react when their partner gets a better deal than them? Do they note the inequity or do their responses reflect frustration in response to unattainable rewards? To tease apart inequity and contrast, we tested chimpanzees in a series of conditions that created loss through individual contrast, through inequity, or by both. Chimpanzees were tested in four social and two individual conditions in which they received food rewards in return for exchanging tokens with an experimenter. In conditions designed to create individual contrast, after completing an exchange, the chimpanzees were given a relatively less-preferred reward than the one they were previously shown. The chimpanzees’ willingness to accept the less-preferred rewards was independent of previously offered foods in both the social and individual conditions. In conditions that created frustration through inequity, subjects were given a less-preferred reward than the one received by their partner, but not in relation to the reward they were previously offered. In a social context, females were more likely to refuse to participate when they received a less-preferred reward than their partner (disadvantageous inequity), than when they received a more-preferred reward (advantageous inequity). Specifically, the females’ refusals were typified by refusals to exchange tokens rather than refusals to accept food rewards. Males showed no difference in their responses to inequity or individual contrast. These results support previous evidence that some chimpanzees’ responses to inequity are mediated more strongly by what others receive than by frustration effects.