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Evolutionspsychologen haben wiederholt Beweise dafür geliefert, dass es physische Merkmale gibt, die bei der Attraktivitätseinschätzung besondere Bedeutung haben und unsere Partnerpräferenzen beeinflussen. Merkmale schöner Gesichter sind nach wissenschaftlichen Erkenntnissen deshalb attraktiv, weil sie letztendlich Rückschlüsse auf die Qualität eines potenziellen Geschlechtspartners zulassen. Die Tatsache, dass der Menstruationszyklus die Partnerpräferenzen von Frauen beeinflusst, wird als Ausdruck differenzieller Partnerwahlkriterien im Hinblick auf den Reproduktionserfolg erklärt. Maskuline Gesichter signalisieren ein höheres Potenzial an Fortpflanzungswahrscheinlichkeit, werden von Frauen an den Tagen erhöhter Empfängniswahrscheinlichkeit bevorzugt, erhalten jedoch weniger positive Persönlichkeitsattribute. Feminine Männergesichter kennzeichnen einen „guten Vater“, erhalten den Vorzug während der nichtfruchtbaren Tage und werden hinsichtlich ihrer Persönlichkeit positiver eingestuft. Dieser Artikel erklärt den „adaptiven Kompromiss“, den Frauen bei der Wahl eines Mannes eingehen, aus verhaltensbiologischer Perspektive und beschreibt das Phänomen der zyklusabhängigen Partnerwahl anhand einiger aktueller Arbeiten.
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Perception of age and health is critical in the judgement of attractiveness. The few studies conducted on the significance of apparent skin condition on human physical appearance have studied faces alone or isolated fields of images facial skin. Little is known about whether perception of the face matches that of other body parts or if body skin affects overall age and attractiveness perception when presented in combination with facial skin. We hypothesized that independent presentation of female faces, chests and arms (including hands) – cropped from a full face and upper body image – would result in significant differences in perception of age and attractiveness compared to the corresponding composite. Furthermore, we sought to investigate whether relatively young and attractive looking skin on selected, individual parts of the body affects overall perception. Digital photographs of 52 women aged 45–65 years were collected and processed to yield four derivative sets of images: One set showed the composite of all features, i.e. the face, the chest and the arms, whereas the other three were cropped carefully to show each part of the upper body described above independently. A total of 240 participants judged these faces for perceived age and attractiveness. Our results showed significant differences in perception with the chest and the arms being judged significantly younger than the face or composite image of the same women. Moreover, arms and chest images were perceived as more attractive than face and composite images. Finally, regression analysis indicated that differences between the perceived and chronological values of overall age perception could be predicted by age perception of the face and arms. These results continue to support the significance of facial age perception in assessment of a woman’s age, but highlight that body skin also plays a role in overall age impression.
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Background Skin color distribution and skin surface topography are the predominant drivers of the variation in visible skin condition, and this variation affects one’s perception of age and health. Recent research, however, has shown that the strength of the impact of these features on perception differs such that skin surface topography is a stronger indicator of age, while skin color distribution is more strongly linked to health perception. Objectives To examine further the relative contribution and interaction effects of skin color distribution and surface topography cues on perception by considering small changes of these features. Methods Two sets of images were created by gradually smoothing uneven skin color distribution and removing skin surface topography cues (both in 25% increments) in the digital image of the face of a 61-year-old British woman. Omnibus pairwise combinations of modified images were presented to a panel of 160 German men and women (aged 19–49 years). With each pair, they were asked to select the face they considered both younger-looking and healthier. Results Female facial age perception was more strongly affected by the removal of skin surface topography cues than by changes in skin color distribution, particularly so for topography removal of 50% and more. In contrast, the smoothing of uneven skin color distribution had a stronger effect on the perception of female facial health, particularly for changes of 25% and greater. Conclusions These results support previous reports on the differential effects of visible skin color distribution and surface topography cues on the perception of female facial age and health and show that only relatively small changes are necessary to drive this differential perception.
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Facial, olfactory, and vocal cues may advertise women's fertility. However, most of the evidence for this proposal has come from studies of changes in young adult women's attractiveness over the menstrual cycle. By contrast with this emphasis on changes in attractiveness over the menstrual cycle, possible changes in women's attractiveness over their lifespan have received little attention. The present study investigated men's ratings of young girls' (11–15 years old), adult women's (19–30 years old) and circum-menopausal women's (50–65 years old) facial, body odor, and vocal attractiveness and femininity. Faces and voices, but not body odors, of young girls and adult women were perceived to be significantly more attractive and feminine than those of circum-menopausal women. These data suggest that facial and vocal cues may be cues to women's reproductive value, but that body odor cues do not necessarily advertise this information.
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Roberts et al. (2004) showed that perceived facial attractiveness of women is higher in the fertile phase of the menstrual cycle than in the luteal phase, suggesting the existence of visible cues of ovulation. However, the nature of such cues remains speculative. Here, in an initial pilot study, we test the hypothesis that changes in female facial skin coloration across the menstrual cycle could be one of the signals that men have adapted to in order to assess female fertility. Spectrophotometric measurements of the facial skin color of normally ovulating Caucasian women (aged 24–29 years) were collected in the late follicular and midluteal phase of their menstrual cycle. Facial images were also taken in both sessions and judged for attractiveness and health by a panel of German men (aged 16–37 years). In line with Roberts et al. (2004), our results show that men perceive women in the late follicular phase to be significantly more attractive and healthier than those in the midluteal phase. However, we did not detect any significant differences in objective measurements of skin color between the two phases. We conclude that the increase in male perception of female facial attractiveness and health in the fertile phase of the menstrual cycle is not caused by a change in overall skin color and/or lightness.
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Objectives Comparative research suggests that male courtship displays signal condition-dependent traits tofemales; these displays might also provide cues to potential male competitors. Although some associations betweenhuman movements and physical/behavioral qualities have been found, such research has typically only been conducted from a perspective of female mate choice. Here, using advanced motion capture and biomechanical analyses, we examine the extent to which male dancing provides cues about the dancer's physical qualities to both males and females. Methods Thirty men aged 19–37 were recorded using motion-capture technology as they danced to a standard rhythm. Participants also completed a vascular fitness test, assessments of upper- and lower-body strength, and biomechanical indices were extracted from their dance movements. Dance clips were converted into virtual humanoid characters (avatars) and rated by 27 women and 21 men on perceived dance quality. Results General linear mixed modeling revealed that both handgrip strength and arm movements of the dancer were statistically significant predictors of dance quality ratings; stronger males who displayed larger, more variable, and faster movements of their arms being rated as better dancers. There was no effect of the sex of the observer in predicting dance quality ratings, indicating that male and female observers rated dance quality equivalently. Physical fitness was not associated with perceived dance quality. Conclusions Men and women are able to derive certain quality cues from observing male dance movements in the form of controlled stimuli. Thus, male dancing may form a condition-dependent ornament of certain aspects of mate quality.
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The ratio between the second and fourth fingers (2D:4D) is supposed to serve as a putative indicator of prenatal testosterone (PT). Significant associations between 2D:4D, children's basic numerical ability, and the Spatial Numerical Associations of Response Codes (SNARC) effect have recently been reported. The present study explored potential relationships between 2D:4D and the basic numerical ability of subitizing (the rapid enumeration of small quantities) in 80 right-handed adult volunteers. Participants completed a short battery of computerized subitizing and color recognition control tasks with both left and right hands, independently (order counterbalanced). Findings revealed a significant interaction between sex and 2D:4D on reaction time differences for right vs. left hand responses to the subitizing task. While 2D:4D in women showed a significant negative association with a right-hand advantage for the task, a nonsignificant trend in the opposite direction was observed for men. Results are discussed with respect to the possible effect of PT on sex differences in lateralization for basic quantification.
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Recent research shows that women judge men who show variability in their body movements as good dancers. Here we report data on women’s perception of dance quality in 48 men, aged 18–42 years, and relate them to men’s self-reported personality traits. Male participants completed a standardised personality inventory (the NEO-FFI) and then danced to a basic rhythm while their body movements were tracked with optical 3D motion-capture technology. Dance movements were applied to a featureless virtual humanoid character and judged on their dance quality by 53 women, aged 17–57 years, who viewed 15 s of the rendered video clips of each male dancer. Conscientiousness and social agreeableness was correlated positively and significantly with women’s perception of men’s dance quality. Extraversion showed a positive correlation and neuroticism and openness were associated negatively with women’s perception of men’s dance quality, though these correlations failed to reach significance. We suggest that male dance movements may convey aspects of their personality, though possible consequences in terms of female mate preferences and selection remain to be explored.
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Several disciplines share an interest in the evolutionary selection pressures that shaped human physical functioning and appearance, psyche, and behavior. The methodologies invoked from the disciplines studying these domains are often based on different rhetorics, and hence may conflict. Progress in one field is thereby hampered from effective transfer to others. Topics at the intersection of anthropometry and psychometry, such as the impact of sexual selection on the hominin face, are a typical example. Since the underlying (evolutionary) theory explicitly places facial form in the middle of a causal chain as the mediating variable between biological causes and psychological effects, a particularly convenient conceptual and analytic scenario arises as follows. Modern morphometrics allows analysis of shape both “backwards” (by regressions on biology) and “forwards” (via predictions of psychology). The two computations are commensurate, hence the two kinds of effects can be compared and evaluated as directions in the same morphospace. We suggest translating the morphometric methodology of “Darwinian aesthetics” into this space, where psychological and other processes of interest can be coded commensurately. Such a translation permits researchers to relate the effects of biological processes on form to the perceptions of the same processes in one unified “psychomorphospace.”
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People judge attractiveness and make trait inferences from the physical appearance of others, and research reveals high agreement among observers making such judgments. Evolutionary psychologists have argued that interest in physical appearance and beauty reflects adaptations that motivate the search for desirable qualities in a potential partner. Although men more than women value the physical appearance of a partner, appearance universally affects social perception in both sexes. Most studies of attractiveness perceptions have focused on third party assessments of static representations of the face and body. Corroborating evidence suggests that body movement, such as dance, also conveys information about mate quality. Here we review evidence that dynamic cues (e.g., gait, dance) also influence perceptions of mate quality, including personality traits, strength, and overall attractiveness. We recommend that attractiveness research considers the informational value of body movement in addition to static cues, to present an integrated perspective on human social perception.
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Objectives Body symmetry and physical strength in males have been related to aspects of mate “quality”—women seem to prefer men who display both “good genes” (as indexed by high symmetry/developmental health) and fighting ability (as indexed by physical strength). Here we show that fluctuating asymmetry (FA) of the body and physical strength are negatively correlated. Methods Body FA (from 12 paired traits) and handgrip strength (HGS; a measure of muscular power and force) were measured in a sample of 69 heterosexual, right-handed men (18–42 years). Results There were positive correlations of body symmetry with HGS after controlling for the effect of body-mass-index. Conclusions We conclude that in males, body symmetry and physical strength are correlated such that symmetric individuals tend to develop higher strength, which may contribute to their success in inter- and intra-sexual selection.
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Objectives Physical strength provides information about male quality and can be assessed from facial and body morphology. Research on perception of dance movements indicates that body movement also provides information about male physical strength. These relationships have not been investigated for women. Methods We investigated relationships of handgrip strength (HGS) and dance attractiveness perception in 75 men and 84 women. Results We identified positive relationships between HGS and opposite-sex assessments of dance attractiveness for men but not women. Conclusions The replication of previous research investigating relationships between dance attractiveness and physical strength in men corroborates the hypothesis that dance movements provide information about male quality. We argue that these relationships are interpretable in contexts of inter- and intra-sexual selection.
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Here we show that gender identification of male (but not female) heterosexual, right-handed dancers correlates with physical strength (measured via handgrip strength) after controlling for the effect of body-mass-index on strength. Using optical motion capture technology, we collected the dance movements of men and women for subsequent animations of uniform shape- and texture-standardized virtual characters (avatars). Short video clips (15 s) of these movements were presented to male and female adults and children, who were asked to identify the gender of the avatar. Gender identification performance was significantly higher than chance for both adults and children. Among adults (but not among children) the avatars of male dancers who were physically stronger were perceived as males significantly more often than were the avatars of male dancers who were physically weaker. There was no relationship between strength and gender identification for female dancers. We conclude that physical strength affects gender identification from human dance movements at least for male dancers, and that pre-pubertal children might not be sensitive to strength cues in dance movements.
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Intrasexual competition is often characterized by the struggle for sexual partners. Men’s competitive behavior typically includes physically aggressive acts or anger, whereas women tend to disgrace their rivals via derogation. Fluctuating asymmetry (FA), a measure of developmental instability and health, has been reported to negatively correlate with physical aggression in boys and young adults. In this study, we investigated the relationship between facial FA and different forms of aggression in a sample of 296 Spanish adolescents (148 men and 148 women) aged 14–19 years. Geometric morphometrics was used to assess facial FA and the buss and perry aggression questionnaire (BPAQ) was administered to collect self-reports of physical aggression, verbal aggression, anger and hostility. Our results showed a negative association between facial FA and anger in male adolescents and with hostility only in older adolescent women (17–19 years). No significant association was detected between physical aggression and facial FA in either sex. We discuss our results with reference to the recalibrational theory of anger (in men) and in terms of competitor derogation (in women).
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Recent research shows that ‘good’ male dancers display larger and more variable movements of their head, neck and trunk, and differ in certain personality characteristics from ‘bad’ dancers. Here we elaborate on these findings by testing the hypothesis that ‘good’ male dancers will also receive higher visual attention and will be judged as being more attractive by women. The eye-gaze of 46 women aged 19–33 years was tracked whilst they viewed pairs of video clips of male dancers in the form of avatars created using motion capture, each pair showing one ‘good’ and one ‘bad’ dancer together on the screen. In a subsequent rating task, women judged each dance avatar on perceived attractiveness and masculinity. Our data show that women viewed ‘good’ dancers significantly longer and more often than ‘bad’ dancers. In addition, visual attention was positively correlated with perceived attractiveness and masculinity, though the latter association failed to reach statistical significance. We conclude that (i) ‘good’ male dancers receive higher visual attention from women as compared to ‘bad’ dancers, and (ii) ‘good’ dancers are being judged as more attractive. This suggests that in following mating-related motives, women are selectively processing male dynamic displays, such as dance movements.
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Studies of several mammalian species confirm that formant frequencies (vocal tract resonances) predict height and weight better than does fundamental frequency (F0, perceived as pitch) in same-sex adults due to differential anatomical constraints. However, our recent meta-analysis (Pisanski et al., 2014, Animal Behaviour, 95, 89–99) indicated that formants and F0 could explain no more than 10% and 2% of the variance in human height, respectively, controlling for sex and age. Here, we examined whether other voice parameters, many of which are affected by sex hormones, can indicate additional variance in human body size or shape, and whether these relationships differ between the sexes. Using a cross-cultural sample of 700 men and women, we examined relationships among 19 voice parameters (minimum–maximum F0, mean F0, F0 variability, formant-based vocal tract length estimates, shimmer, jitter, harmonics-to-noise ratio) and eight indices of body size or shape (height, weight, body mass index, hip, waist and chest circumferences, waist-to-hip ratio, chest-to-hip ratio). Our results confirm that formant measures explain the most variance in heights and weights of men and women, whereas shimmer, jitter and harmonics-to-noise ratio do not indicate height, weight or body mass index in either sex. In contrast, these perturbation and noise parameters, in addition to F0 range and variability, explained more variance in body shape than did formants or mean F0, particularly among men. Shimmer or jitter explained the most variance in men's hip circumferences (12%) and chest-to-hip ratios (6%), whereas harmonics-to-noise ratio and formants explained the most variance in women's waist-to-hip ratios (11%), and significantly more than in men's waist-to-hip ratios. Our study represents the most comprehensive analysis of vocal indicators of human body size to date and offers a foundation for future research examining the hormonal mechanisms of voice production in humans and perceptual playback experiments.
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The majority of studies on human physical appearance within the evolutionary psychology framework have focused on static two-dimensional representations of facial and body morphology. While such experiments are useful for testing people’s preferences and reactions to even subtle changes in physical features, there is an inherent limitation with regard to the ecological validity of these types of stimuli. Recent research on female perceptions of male body movements suggests that females derive similar cues of male “quality” from movement as from faces and bodies. Here we review studies on key biological and social characteristics that can be derived from body movements, with a focus on female perception of males, and present evidence for the assertion that male dance movements in particular affect female mate preferences. We support this by reporting preliminary empirical data of studies on (1) cross-cultural similarities and differences in female perceptions of male dance movements and (2) relationships between female perceptions of male dancing, running, and walking. Finally, we present some ideas for future research directions to stimulate the scientific investigation on the significance of male body movements in the context of inter- and intrasexual selection.
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Gender inequality varies across nations, where such inequality is defined as the disproportionate representation of one sex over the other in desirable social, economic, and biological roles (typically male over female). Thus in Norway, 40% of parliamentarians are women, in the USA 17%, and in Saudi Arabia 0%. Some of this variation is associated with economic prosperity but there is evidence that this cause and effect can go in either direction. Here we show that within a population the average ratio of index (2D) to ring (4D) finger lengths (2D:4D)—a proxy measure of the relative degree to which offspring is exposed in utero to testosterone versus estrogen—is correlated with measures of gender inequality between nations. We compared male and female 2D:4D ratios to female parliamentary representation, labor force participation, female education level, maternal mortality rates, and juvenile pregnancy rates per nation in a sample of 29 countries. We found those nations who showed higher than expected female fetal exposure to testosterone (low 2D:4D) and lower than expected male exposure to fetal testosterone (high 2D:4D) had higher rates of female parliamentary representation, and higher female labor force participation. In short, the more similar the two sexes were in 2D:4D, the more equal were the two sexes in parliamentary and labor force participation. The other variables were not as strongly correlated. We suggest that higher than expected fetal testosterone in females and lower fetal testosterone in males may lead to high female representation in the national labor force and in parliament.
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Although humans are usually believed to be prosocial, the evolutionary origins of prosociality are largely debated. One hypothesis is that cooperative breeding has been one major precursor to the emergence of prosociality. In vertebrates, however, experimental evidence of prosociality has been mainly gathered in non-human primates. In this study, we tested the cooperative breeding hypothesis in cooperative breeding meerkats (Suricata suricatta). In particualr, we tested whether meerkats take into account partners' benefits when distributing food rewards. Nine individuals were presented with two platforms baited with different food distributions (providing food to themselves, to a partner or both). In all conditions, the decision to operate the appartus was based on the presence of food on the subject's side, and not on the possible benefits to partners. Despite being cooperative breeders, meerkats in this study failed to be prosocial, suggesting that prosociality in this species may be limited to specific contexts.
