Stress and infectious disease in humans

This article reviews research on the role of stress in infectious disease as measured either by illness behaviors (symptoms and use of health services) or by verified pathology. Substantial evidence was found for an association between stress and increased illness behavior, and less convincing but provocative evidence was found for a similar association between stress and infectious pathology. Introverts, isolates, and persons lacking social skills may also be at increased risk for both illness behaviors and pathology. Psychobiological models of how stress could influence the onset and progression of infectious disease and a psychological model of how stress could influence illness behaviors are proposed.     

Perceived threat of infectious disease and its implications for sexual attitudes

A study (n = 411) investigated the relationship between chronic individual differences in germ aversion and sociosexual attitudes (short-term mating orientation, long-term mating orientation, and anticipated future sexual promiscuity), and also tested whether the magnitudes of these relations differ depending on the temporary perceptual salience of disease threat. Results revealed person-by-situation interactions. When the threat of disease was temporarily salient, germ aversion correlated negatively with short-term mating orientation and with future sexual promiscuity, and correlated positively with long-term mating orientation; these effects were either weaker or nonexistent under control conditions. These effects emerged most clearly among women.     

Public engagement with emerging infectious disease: The case of MRSA in Britain

As a route to providing a framework for elucidating the content of public thinking concerning emerging and re-emerging infectious diseases (EID), this article examines public engagement with methicillin-resistant Staphylococcus aureus (MRSA). It explores how British lay publics represent MRSA utilising a social representations framework. For this group, MRSA is associated primarily with dirty National Health Service (NHS) hospitals that have been neglected due to management culture having superseded the matron culture that dominated the putative golden age of the NHS. Furthermore, MRSA represents a transgression of the purpose of a hospital as a clean and curative institution. While this widely shared picture is accompanied by a strong sense of general concern, the respondents associate contracting MRSA with other identities, such as hospitalised, young and old people. These associations are linked to feelings of personal invulnerability. There is also blame of foreigners – especially cleaners and nurses – for MRSA's spread. Thus, the data corroborate a key pattern of response found in relation to myriad EID – that of othering. However, the identities associated with contracting MRSA are mutable; therefore, the threat cannot be distanced unequivocally. Beyond developing an understanding of the relationship between epidemics and identities, this article proposes a fitting theory with which to explore EID-related public thinking.     

Public engagement with emerging infectious disease: the case of MRSA in Britain

As a route to providing a framework for elucidating the content of public thinking concerning emerging and re-emerging infectious diseases (EID), this article examines public engagement with methicillin-resistant Staphylococcus aureus (MRSA). It explores how British lay publics represent MRSA utilising a social representations framework. For this group, MRSA is associated primarily with dirty National Health Service (NHS) hospitals that have been neglected due to management culture having superseded the matron culture that dominated the putative golden age of the NHS. Furthermore, MRSA represents a transgression of the purpose of a hospital as a clean and curative institution. While this widely shared picture is accompanied by a strong sense of general concern, the respondents associate contracting MRSA with other identities, such as hospitalised, young and old people. These associations are linked to feelings of personal invulnerability. There is also blame of foreigners--especially cleaners and nurses--for MRSA's spread. Thus, the data corroborate a key pattern of response found in relation to myriad EID--that of othering. However, the identities associated with contracting MRSA are mutable; therefore, the threat cannot be distanced unequivocally. Beyond developing an understanding of the relationship between epidemics and identities, this article proposes a fitting theory with which to explore EID-related public thinking.     

群际偏差的进化：人类对暴力与疾病威胁的适应

内群体偏好与内群体贬低现象普遍存在于社会生活中, 但为何会存在这两种群际偏差的心理机制以及这两种群际偏差是否具有进化基础的问题一直没有得到解答。通过系统整理在暴力威胁和疾病威胁构成的生存压力下, 两种群际偏差遵循烟雾探测原则和功能弹性原则处理威胁线索的研究报告, 研究说明了两者虽然方向完全相反, 但却是同一威胁管理机制对特定的内外群体关系产生的不同反应, 具有进化的适应性, 支持其进化假说。     

Individual differences in utilizing control to cope with job demands: effects on susceptibility to infectious disease

This study examined the interactive effects of job demands, control, and individual characteristics on upper respiratory illnesses and immune function. Having high job control appeared to lessen the linkage between job demands and poor health among individuals with high self-efficacy and those who perceived that they were not often responsible for negative job outcomes. Conversely, having high job control exacerbated the association between job demands and poor health among inefficacious individuals. Implications for promoting more healthful work environments and facilitating employee coping are discussed.     

Threat(s) and conformity deconstructed: Perceived threat of infectious disease and its implications for conformist attitudes and behavior

Threat has been linked to conformity, but little is known about the specific effects of different kinds of threat. We test the hypothesis that perceived threat of infectious disease exerts a unique influence on conformist attitudes and behavior. Correlational and experimental results support the hypothesis. Individual differences in Perceived Vulnerability to Disease predict conformist attitudes; these effects persist when controlling for individual differences in the Belief in a Dangerous World. Experimentally manipulated salience of disease threat produced stronger conformist attitudes and behavior, compared with control conditions (including a condition in which disease‐irrelevant threats were salient). Additional results suggest that these effects may be especially pronounced in specific domains of normative behavior that are especially pertinent to pathogen transmission. These results have implications for understanding the antecedents of conformity, the psychology of threat, and the social consequences of infectious disease. Copyright © 2011 John Wiley & Sons, Ltd.     

Ethical Evolution

Two papers on global morality and ethics—by David Loye and Solomon H. Katz—are hereby placed into an evolutionary context. Simply stated though no less true, ethical evolution will likely be the next great evolutionary leap forward into the future—if humankind is to have a future.     

Directed Evolution

Though we humans are immensely more gifted than other animals, yet we are not the outcome of an inevitable selection of the 'fittest'. Nor on the other hand is our importance diminished by our evolutionary inheritance. Besides, we are already here! Faith in inevitable progress is a 'scientific', not a Christian, delusion. We realise that the universe has its own rules and complications which intrude on our lives and often thwart our choices. It is therefore legitimate to talk of chance, but we often fail to appreciate the real significance of this word. Chance is not a cause; in essence it refers to our own consciousness that we are immersed in circumstance, and it has no reality without our own purposiveness. Thus chance is not some blind and indifferent or even hostile cosmic mystery; it is the occasion of our own responses, and it even offers the opportunity of human growth. Just as we accept the laws (and dangers) of physics (e.g. gravitation), as the framework of our ordered existence, so also we may accept the surprises of chance without any despairing conclusion either from our latest researches in astronomy or from a fatal accident in the street.     

The Evolution of Stalking

We propose that stalking tactics have been shaped by evolutionary processes to help solve mating problems. These include: (1) acquiring new mates, (2) guarding existing mates to prevent defection, (3) fending off mate poachers, (4) poaching someone else’s mate, (5) interfering with intrasexual competitors, (6) reacquiring ex-mates, (7) sexual exploitation and predation, and (8) guarding kin from sexual exploitation. We hypothesize several, gender-differentiated design features of psychological adaptations, including sensitivity to adaptive problems for which stalking was an ancestral solution and cognitive biases that function to motivate and perpetuate stalking behaviors. Although often abhorrent, cost-inflicting, and illegal, stalking sometimes enables successful adaptive solutions to problems of mating and within-gender competition faced by both men and women.     

Evolution of Primate Cognition

Comparative analysis of the behavior of modern primates, in conjunction with an accurate phylogenetic tree of relatedness, has the power to chart the early history of human cognitive evolution. Adaptive cognitive changes along this path occurred, it is believed, in response to various forms of complexity; to some extent, theories that relate particular challenges to cognitive adaptations can also be tested against comparative data on primate ecology and behavior. This paper explains the procedures by which data are employed, and uses the best currently available evidence to derive a proposal for some of the stages through which human cognition evolved, before the last common ancestor with a nonhuman, and the reasons that cognitive adaptations were favored in primate evolution.     

The Evolution of Empathy

Therapeutic empathy has been an often-used construct by counseling professionals. Through that usage, the term has evolved in meaning and significance from its original presentation by Carl Rogers. This article traces that evolution by identifying its users and contributors over the past 20 years. These include counselor-practitioners, counselor educators, researchers, and increasingly, the public. The resulting changes have implications for future research directions, counselor training, and the practice of counseling.     

Evolution of Destructive Aggression

Aggression is defined as a mechanism of spacing by means of force or displays. It has evolved independently in different animal groups. The mechanisms underlying it are therefore not homologous throughout the animal kingdom. The phenomenon of aggression is so widespread, however, that strong selection pressures must be responsible for its development along analogous lines. Its most obvious functions are in competition for mates, natural resources, and territories, and in the preservation of group identity in many gregarious species. Aggression is often ritualized so that no damage is done to conspecifics. This ritualization may appear as modification of fighting into a tournament, or as the development of submissive postures which block further aggression in the opponent shortly after the onset of a potentially damaging fight. Animal aggression is preprogrammed by phylogenetic adaptation in well-defined ways, but can be modified by experience. The inborn programs involve motor patterns, innate releasing mechanisms, releasers, motivating mechanisms, and learning dispositions specific for the species. Aggression on this biological level can be observed in humans as intragroup aggression. Certain motor patterns and signals which lead to the release of aggression are universal. Some can even be found in deaf- and blind-born people, proving their innateness. A number of patterns of aggression in man are highly ritualized and - in a way analogous to that found in many animals - mechanisms of control have evolved inhibiting the killing of a conspecific. There are strong indications of the existence of motivating mechanisms within the brain, e.g., in the form of neuronal circuits, that show a degree of spontaneity. The type of destructive aggression which we call war, is a product of cultural evolution. War takes advantage of the given motivational structure of man, including his fear of strangers, which develops in every baby independently of experience and makes men inclined to form closed groups and causes them to be wary of or hostile to strangers. Based on these tendencies, man underwent a process of cultural subspeciation. Groups demarcated themselves from others by custom, erecting communication barriers. The development of languages demonstrates how fast and efficient this process is. Members of the same group, during this process, were defined as the “real man,” outsiders often were to be valued less -or even considered nonhuman. On the basis of this self-indoctrination, cultural codes of conduct developed, which allowed members of other groups to be killed when groups competed for resources. A cultural fiiter of norms was established which demanded killing under defined conditions, and was superimposed upon the biological filter of norms which inhibits the killing of a human being. This results in a conflict of norms, which is universally felt as guilt, since the biological filter of norms, though superimposed, is nonetheless working, particularly in the circumstance of a personal encounter. The more advanced the technique of armament, which allows fast and distant killing, the less the inhibitions are activated. Nonetheless, ritualizations occur on the cultural level. Warfare is sometimes ritualized and conventions are developed to prevent escalation into massacres, or the wholesale destruction of the subjugated enemy. To a great extent, this is certainly a result of our inborn moral code, If nothing like this were given to man our situation would be disastrous indeed. Whether cultural evolution will, in the future, be guided by moral maxims in accord with our human nature is a deeision men must make rationally. Although a ruthless ethnocentrism may bring advantage to a warring group, this may eventually prove fatal to mankind as a whole. In the escalating competition mankind runs the danger not only of exhausting its resources, but of destroying itself with its new weapons. If the outcome were not selfdestruction but domination by one group it would impoverish the diversity of human cultures, and thus seriously cut down man's spectrum of adaptability. War fulfills certain functions, similar to those found in animals. It is mainly a mechanism for preserving and extending one's territory, and a means of getting access to scarce resources. It is therefore dangerous to consider war merely as a pathological form of human behavior because this may distract our attention from the fact that, h order to overcome war, the functions of war have to be fulfilled by nonviolent means. Cultural evolution phenocopies biological evolution, due to similarities in the selection pressures shaping its course. This allows us to define the point of the evolutionary spiral we are at currently and to predict our future course.     

进化论与创世论

<圣经·创世记>中说:人和世界是上帝在七天之内创造出来的.上帝创造万物的原则是各从其类,即各物种自被创造出来后就是固定的,不会改变.人是上帝按照自己的形象和样式创造的,是整个创造的高峰,所以,人高于万物,是万物的管理者.这就是基督教关于世界和人类起源的创世论思想的主要内容,长期以来,人们视之为天经地义,对之坚信不疑.到18世纪,创世论还得到瑞典博物学家林奈(1707-1778)的植物分类学的有力支持.林奈对于物种作了详细的分类,这给人们一个印象:大自然从它开始的那一刻就固定了下来,每一个物种都是上帝单独、有区别地创造的,都具有自身的固定特征.     

Evolution of concepts of stress

This essay describes the evolution of stress as a medical scientific idea. Claude Bernard, Walter B. Cannon and Hans Selye provided key founding concepts for the current view. Bernard introduced the idea of the internal environment bathing cells - the milieu intérieur - maintained by continual compensatory changes of bodily functions. Cannon coined the word, "homeostasis," referring to a set of acceptable ranges of values for internal variables. Cannon taught that threats to homeostasis evoke activation of the sympathoadrenal system as a functional unit. Selye defined stress as a state characterized by a uniform response pattern, regardless of the particular stressor, that could lead to long-term pathologic changes. "Allostasis" was introduced as a concept in recognition that there is no single ideal set of steady-state conditions in life; instead, setpoints and other response criteria change continuously. Stress is now viewed neither as a perturbation nor a stereotyped response pattern but as a condition characterized by a perceived discrepancy between information about a monitored variable and criteria for eliciting patterned effector responses. Different stressors elicit different patterns of activation of the sympathetic nervous, adrenomedullary hormonal, hypothalamic-pituitary-adrenocortical and other effectors, closing negative feedback loops. This systems concept of stress yields predictions that observation or experimentation can test and that are applicable to normal physiology and to a variety of acute and chronic disorders.