Effects of sexual dimorphism on facial attractiveness

Testosterone-dependent secondary sexual characteristics in males may signal immunological competence and are sexually selected for in several species. In humans, oestrogen-dependent characteristics of the female body correlate with health and reproductive fitness and are found attractive. Enhancing the sexual dimorphism of human faces should raise attractiveness by enhancing sex-hormone-related cues to youth and fertility in females, and to dominance and immunocompetence in males. Here we report the results of asking subjects to choose the most attractive faces from continua that enhanced or diminished differences between the average shape of female and male faces. As predicted, subjects preferred feminized to average shapes of a female face. This preference applied across UK and Japanese populations but was stronger for within-population judgements, which indicates that attractiveness cues are learned. Subjects preferred feminized to average or masculinized shapes of a male face. Enhancing masculine facial characteristics increased both perceived dominance and negative attributions (for example, coldness or dishonesty) relevant to relationships and paternal investment. These results indicate a selection pressure that limits sexual dimorphism and encourages neoteny in humans.     

The neural response to facial attractiveness.

What are the neural correlates of attractiveness? Using functional MRI (fMRI), the authors addressed this question in the specific context of the apprehension of faces. When subjects judged facial beauty explicitly, neural activity in a widely distributed network involving the ventral occipital, anterior insular, dorsal posterior parietal, inferior dorsolateral, and medial prefrontal cortices correlated parametrically with the degree of facial attractiveness. When subjects were not attending explicitly to attractiveness, but rather were judging facial identity, the ventral occipital region remained responsive to facial beauty. The authors propose that this region, which includes the fusiform face area (FFA), the lateral occipital cortex (LOC), and medially adjacent regions, is activated automatically by beauty and may serve as a neural trigger for pervasive effects of attractiveness in social interactions. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Stability of females' facial attractiveness during childhood.

96 male university students rated the attractiveness of 13 females, using yearbook photographs taken in Grades 1, 4, 7, or 10. A mixed-model ANOVA indicated that the targets differed from one another in attractiveness averaged over time but that substantial intraindividual changes occurred as well. The stability of ratings of attractiveness suggests that the social effects of attractiveness may have long-term influences on one's life. The "beautiful-is-good" stereotype might cause unattractive people to be avoided, causing them to develop negative self-concepts and preventing them from receiving the feedback necessary to develop social skills. (11 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

What do women want? Facialmetric assessment of multiple motives in the perception of male facial physical attractiveness.

The multiple motive hypothesis of physical attractiveness suggests that women are attracted to men whose appearances elicit their nurturant feelings, who appear to possess sexual maturity and dominance characteristics, who seem sociable, approachable, and of high social status. Those multiple motives may cause people to be attracted to individuals who display an optimal combination of neotenous, mature, and expressive facial features, plus desirable grooming attributes. Three quasi-experiments demonstrated that men who possessed the neotenous features of large eyes, the mature features of prominent cheekbones and a large chin, the expressive feature of a big smile, and high-status clothing were seen as more attractive than other men. Further supporting the multiple motive hypothesis, the 2nd and 3rd studies indicated that impressions of attractiveness had strong relations with selections of men to date and to marry but had a curvilinear relation with perceptions of a baby face vs a mature face. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Effects of age and gender on perceived facial attractiveness.

Examined 2 alternative predictions: (1) that Ss would find others similar to themselves as most attractive or (2) that men would prefer younger women and women more mature men. 22 men and 25 women (aged 17–29 yrs), 16 men and 18 women (aged 30–49 yrs) and 18 men and 32 women (aged 50+ yrs) rated the physical attractiveness of 72 photographs of faces from similar age/gender categories. For all groups of Ss, perceived attractiveness declined with age of face, particularly for women's faces. In addition, most groups rated women's faces as more attractive than those of men, the exception being men under 30 yrs, who rated men higher. (French abstract) (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

Neuroanatomical correlates of cognitive aging: Evidence from structural magnetic resonance imaging.

To examine putative brain substrates of cognitive functions differentially affected by age, the authors measured the volume of cortical regions and performance on tests of executive functions, working memory, explicit memory, and priming in healthy adults (18-77 years old). The results indicate that shrinkage of the prefrontal cortex mediates age-related increases in perseveration. The volume of visual processing areas predicted performance on nonverbal working memory tasks. Contrary to the hypotheses, in the examined age range, the volume of limbic structures was unrelated to any of the cognitive functions; verbal working memory, verbal explicit memory, and verbal priming were independent of cortical volumes. Nevertheless, among the participants aged above 60, reduction in the volume of limbic structures predicted declines in explicit memory. Chronological age adversely influenced all cognitive indices, although its effects on priming were only indirect, mediated by declines in verbal working memory. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Effect of facial expression variations on ratings of infants' physical attractiveness.

A potentially important influence on how an adult responds to an infant is the infant's physical attractiveness. To assess whether an infant's physical attractiveness can reliably be judged despite variations in an infant's facial expression, 115 college students rated the "cuteness" of a set of photographs of infants. The set contained 3 photographs varying in facial expression of each of 24 infants. Results indicate that although photographs depicting more positive facial expressions received higher cuteness ratings, cuteness ratings varied less within individual infants than across infants. General facial configuration was more important than facial expression in determining adults' perceptions of infants' cuteness. It is concluded that physical attractiveness appears to be a reliably measurable variable of individual difference as early as infancy. (6 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Symmetry and perceived facial attractiveness: A monozygotic co-twin comparison.

Symmetry is a major correlate of physical attractiveness across species, including humans. Investigating the nature of this relationship has been difficult, however, for several reasons, including the facts that variance in symmetry is attributable to more than one source and is often correlated with other variables related to attractiveness. This study assessed the role of facial symmetry in relation to perceptions of facial attractiveness. Some of the natural covariates of symmetry were controlled for by comparing the symmetry and attractiveness differentials between monozygotic co-twins, who are genetically, but not developmentally, identical. The more symmetric twin of a pair was consistently rated as more attractive, and the magnitude of the difference between twins in perceived attractiveness was directly related to the magnitude of the difference in symmetry. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Measuring the physical in physical attractiveness: Quasi-experiments on the sociobiology of female facial beauty.

Investigated, in 2 quasi-experiments, the relation between specific adult female facial features and the attraction, attribution, and altruistic responses of adult males. Precise measurements were obtained of the relative size of 24 facial features in an international sample of photographs of 50 females. 75 undergraduate males provided ratings of the attractiveness of each of the females. Positively correlated with attractiveness ratings were the neonate features of large eyes, small nose, and small chin; the maturity features of prominent cheekbones and narrow cheeks; and the expressive features of high eyebrows, large pupils, and large smile. A 2nd study asked males to rate the personal characteristics of 16 previously measured females. The males were also asked to indicate the females for whom they would be most inclined to perform altruistic behaviors and to select for dating, sexual behavior, and childrearing. The 2nd study replicated the correlations of feature measurements with attractiveness. Facial features also predicted personality attributions, altruistic inclinations, and reproductive interest. Sociobiological interpretations are discussed. (73 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Human (Homo sapiens) facial attractiveness and sexual selection: the role of symmetry and averageness

The current potency test for pertussis vaccines, the mouse protection test (MPT), has many disadvantages. However, no alternative is yet available. The purpose of this study is to develop a serological alternative for the MPT based on in vitro assessment of the humoral immune response against pertussis in mice. After immunization with pertussis whole cell vaccine, the MPT shows a normal primary and secondary antibody response. Moreover, the i.c. challenge has a distinct booster effect on the pertussis IgG response. The relationship between the concentration of IgG antibodies against the surface-antigens of pertussis bacteria and the survival of mice after the i.c. challenge was demonstrated in a modified MPT (R = 0.91). To this end a protecting antibody level of > or = 45 EU/ml was selected as a level at which concentration most of the mice survived. Survival of mice in the MPT could be predicted, based on the antibody concentration at the day of challenge. Potencies estimated with the predicted and actual survival corresponded well (P = 0.990). This confirmed the essential role of vaccine induced pertussis antibodies in the protection against a lethal i.c. challenge and offered a possibility to develop a pertussis potency test based on serology. We developed a model in which mice (20-24 g) are immunized (i.p.) with graded doses of vaccine and bled after four weeks. Sera are titrated in Bordetella pertussis whole cell ELISA and potency based on vaccine dose dependent antibody response is estimated by means of a parallel line analysis. The potency of vaccines tested in the Pertussis Serological Potency Test (PSPT) and MPT are significantly similar, a P-value of 0.92 was found by means of the chi 2 test. Compared to the MPT, the PSPT is more reproducible as is indicated by its smaller 95% confidence intervals. Moreover, by using the PSPT the animal distress can be reduced to an acceptable level and the PSPT also results in a reduction of more than 25% in use of mice.     

Computerized tomography in the assessment of metastatic facial adenopathy

The facial lymph nodes are classified in five groups: mandibular, buccinator, infraorbital, malar and retrozygomatic nodes. This paper reports the CT appearance of neoplastic involvement of these nodes, an unusual and not well documented event. The CT examinations of 62 patients with a history of primary or recurrent cancer of the epidermal structures of the face, oral cavity and sinonasal region were retrospectively reviewed to assess the presence of facial adenopathy. Nine cases of neoplastic involvement of facial nodes were found. Most commonly the buccinator nodes (4 cases) were involved, the infraorbital, mandibular (2 cases) and retrozygomatic nodes (1 case) being less commonly involved. No malar nodes were found. Neoplastic involvement of these nodes was caused by squamous cell carcinoma in 6 cases, by adenocarcinoma in 2 cases and by a lymphoma in 1 case. Normal nodes could not be confidently identified on CT studies. CT diagnosis of neoplastic involvement of facial nodes is based on the presence of a nodular lesion which lies along the lymphatic pathways of the primary neoplasm in an anatomically compatible location. CT diagnosis of facial nodes is very important for treatment planning if the nodes are deep or at a distance from primary cancer. This is especially true for retrozygomatic and buccinator nodes.     

Quantitative assessment of facial sensation in leprosy

Under ideal conditions, continuous arterial spin labeling (ASL) techniques are higher in SNR than pulsed ASL techniques by a factor of e. Presented here is a direct theoretical and experimental comparison of continuous ASL and pulsed ASL, using versions of both that are amenable to multislice imaging and insensitive to variations in transit times (continuous ASL with a delay before imaging, and QUIPSS II (Quantitative Imaging of Perfusion Using a Single Subtraction-second version)). Perfusion image quality for comparable imaging time was nearly identical for both single-slice and multislice imaging. The measured raw signal was approximately 25% higher with continuous ASL, but the SNR per unit time was identical.     

The function of a face on person perception: the effect of the number of targets and degree of facial attractiveness

Hypertensive therapy based on diuretics is time-honored. Thiazides represent the most commonly used class of diuretics for uncomplicated hypertension because of economic motivations, their tolerance and efficacy both as monotherapy and in combined treatment with other agents. Clinical studies using diuretics and beta-blockers reported that thiazide treatment prevents the development of malignant hypertension, renal and heart failure, hypertensive retinopathy, and reduces in five years overall mortality of 33%, cardiovascular mortality of 41%, fatal and non-fatal cerebrovascular events of 51% and the risk of coronary events of 15%. The less than expected risk reduction of cardiovascular disease raised many concerns about the possibility of adverse biochemical changes of thiazides through their effects on lipids, electrolytes and glucose metabolism. However, the real clinical significance of these metabolic effects remains actually uncertain and needs further investigation. The treatment of the hypertensive patient cannot be adequately managed using a merely adjunctive step-care criterium. Hypertensive subjects have different haemodynamic, metabolic and endocrine disorders and a tailored treatment should consider the different activities of the various agents as monotherapy or in association in the single patient.     

Human (Homo sapiens) facial attractiveness in relation to skin texture and color.

The notion that surface texture may provide important information about the geometry of visible surfaces has attracted considerable attention for a long time. The present study shows that skin texture plays a significant role in the judgment of female facial beauty. Following research in clinical dermatology, the authors developed a computer program that implemented an algorithm based on co-occurrence matrices for the analysis of facial skin texture. Homogeneity and contrast features as well as color parameters were extracted out of stimulus faces. Attractiveness ratings of the images made by male participants relate positively to parameters of skin homogeneity. The authors propose that skin texture is a cue to fertility and health. In contrast to some previous studies, the authors found that dark skin, not light skin, was rated as most attractive. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

A 6-year clinical assessment of electronic facial thermography

The authors briefly report their experience regarding the opportunities offered by the use of current ultrasound methods in carotid surgery. They describe: a system for the quantification of athcromasic plaque used to monitor non-operated patients over time; ultrasound methods used to analyse the carotid wall to establish whether it can be utilised as an index of vascular aggression in hypertension, diabetes and atherosclerosis; the use of transcranial Doppler; criteria for the definition of high risk plaque; the applications of eco-color Doppler. The paper also illustrates a new pathology identified by the authors, defined as primary intimal fibrous hyperplasia, and the evolution of the carotid wall after endarterectomy. The structural characteristics of primary hyperplasia can only be shown using ultrasound given that arteriography cannot distinguish it from atheromatic stenosis. After endarterectomy the carotid wall is subject to hematic and hemodynamic stimuli which determine the type of evolution of the wall itself. The authors therefore examine the myointimal reaction, myointimal hyperplasia, early restenosis and late restenosis as different facets of the same phenomenon.     

The effects of age and gender on perceived facial attractiveness: A reply to McLellan and McKelvie.

Comments on B. McLellan and S. J. McKelvie's study (see record 1993-45212-001) investigating the effects of age and gender on attractiveness of photographs of faces. The results of this study are challenged in the context of sociobiological theory for the following reasons: (1) the implicit assumption that facial attractiveness can be used as an indicator of human mate choice is questionable; (2) age categories of Ss choosing photographs of faces were too broad to test the validity of a sociobiological hypothesis; and (3) results were not accurately interpreted. (French abstract) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Absorption: Nature, assessment, and correlates.

This article reviews theoretical and empirical work on absorption and the relationship of absorption with selected variables. Absorption is defined as a characteristic that involves an openness to experience emotional and cognitive alterations across a variety of situations. The nature and assessment of absorption and the relationship of absorption with (a) hypnosis and hypnotizability, (b) imagery, daydreaming, and consciousness, and (c) attentional processing and psychophysiological responding are considered. Conceptual and methodological issues are examined, and directions for future research are specified. Absorption is argued to be central to an understanding of the nature of subjective experience as well as to aspects of cognition and behavior. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

A longitudinal assessment of the academic correlates of early peer acceptance and rejection

Examines the extent to which academic achievement and work habits of first and second graders are predicted by classroom social status over the kindergarten, first-, and second-grade period. Three hundred and forty five children (163 boys and 182 girls) from a southern California community comprised the sample. The ethnic distribution of the sample was approximately 45% Caucasian, 42% Latino, 9% African American, and 5% Asian or other ethnicity. Findings suggest that peer rejection assessed as early as kindergarten and social rejection that is stable across 2 years (kindergarten-first grade or first-second grade) are associated with deficits in first-grade work habits and second-grade academic achievement and work habits. In contrast, stable social acceptance appears to buffer children from early academic difficulty. The pattern of findings remain significant after controlling for initial kindergarten academic competence. The implications for clinical and educational intervention programs are discussed.     

On the attractiveness of forbidden objects.

Toys were ranked for attractiveness by 15 preschool and 21 4th-grade children. After the initial ranking, the S was told that he could not play with one of the toys. Each toy was subsequently ranked a 2nd time. Results show a strong decrease in the attractiveness of the forbidden toy by preschoolers, but an increase in attractiveness was exhibited by 4th graders. Results suggest that a perceived association between an object's being forbidden and its attractiveness may be learned through the course of socialization. (PsycINFO Database Record (c) 2010 APA, all rights reserved)