Sex differences in scanning faces: Does attention to the eyes explain female superiority in facial expression recognition?

Previous meta-analyses support a female advantage in decoding non-verbal emotion (Hall, 1978, 1984), yet the mechanisms underlying this advantage are not understood. The present study examined whether the female advantage is related to greater female attention to the eyes. Eye-tracking techniques were used to measure attention to the eyes in 19 males and 20 females during a facial expression recognition task. Women were faster and more accurate in their expression recognition compared with men, and women looked more at the eyes than men. Positive relationships were observed between dwell time and number of fixations to the eyes and both accuracy of facial expression recognition and speed of facial expression recognition. These results support the hypothesis that the female advantage in facial expression recognition is related to greater female attention to the eyes.     

Sex differences in a human analogue of the Radial Arm Maze: the "17-Box Maze Test"

This study investigated sex differences in spatial memory using a human analogue of the Radial Arm Maze: a revision on the Nine Box Maze originally developed by called the 17-Box Maze Test herein. The task encourages allocentric spatial processing, dissociates object from spatial memory, and incorporates a within-participants design to provide measures of location and object, working and reference memory. Healthy adult males and females (26 per group) were administered the 17-Box Maze Test, as well as mental rotation and a verbal IQ test. Females made significantly fewer errors on this task than males. However, post hoc analysis revealed that the significant sex difference was specific to object, rather than location, memory measures. These were medium to large effect sizes. The findings raise the issue of task- and component-specific sexual dimorphism in cognitive mapping.     

Sex categorization of conspecific pictures in Japanese monkeys (Macaca fuscata)

We investigated whether monkeys discriminate the sex of individuals from their pictures. Whole-body pictures of adult and nonadult monkeys were used as stimuli. Two male Japanese monkeys were trained for a two-choice sex categorization task in which each of two choice pictures were assigned to male and female, respectively. Following the training, the monkeys were presented with novel monkey pictures, and whether they had acquired the categorization task was tested. The results suggested that while monkeys discriminate between the pictures of adult males and females, discrimination of nonadult pictures was difficult. Partial presentations of the pictures showed that conspicuous and sexually characteristic parts (i.e., underbellies including male scrotums or breasts including female nipples) played an important role in the sex categorization.     

Sex differences in the links between attractiveness, self-esteem and the body

Two studies were conducted to determine: if the links between the body and self-perceived attractiveness and self-esteem for men and women differ. Following evolutionary and social learning theories, affective and cognitive links were hypothesized for women's attractiveness while no links were hypothesized for men's attractiveness. Additionally, affective links were expected for women's self-esteem while no links were expected for men's self-esteem. The results obtained supported these hypotheses. Findings are discussed in terms of the societal value placed on women's attractiveness and evolutionary theory.     

Sex differences in 1-, 3-, and 5-year-olds' toy-choice in a structured play-session

This cross-sectional study investigated toy-choice in 38 one-year-old, 33 three-year-old, and 35 five-year-old children, who could choose between 10 different toys (four feminine, four masculine, and two neutral) in a structured play-session. The children played alone for 7 minutes and together with their accompanying parent for another 7 minutes (play-status). The results showed that girls and boys chose different toys from as early as the age of one year (Mdn = 12 months). These sex differences were found at all three ages. In contradiction to earlier studies, our results showed that feminine toys became less interesting for both girls and boys with increasing age. The present study showed no consistent effects of play-status. This study contributes to the knowledge of how early behavioral sex differences can be observed, how these differences develop, and it also raises questions concerning what sex differences stem from.     

Giftedness: Current Theory and Research

Gifted children, those with unusually high ability in one or more domains, not only develop more rapidly than typical children, but also appear to be qualitatively different. They have an intense drive to master, require little explicit tuition, and, if intellectually gifted, often pose deep philosophical questions. Although some psychologists have tried to account for the achievements of gifted individuals solely in terms of drive or 'deliberate practice,' no evidence allows us to rule out innate differences in talent. Profiles of gifted individuals are often uneven: Extremely high ability in one area can coexist with ordinary or even subnormal ability in another area. Scientific investigation of the gifted reveals the importance of drive and hard work in achievement of any kind, and the lack of necessary correlation among abilities in different areas.     

Sex differences in face recognition and influence of facial affect

To study sex differences in the recognition of human faces with different facial expressions, 65 female and 64 male participants learned to associate names with various male and female neutral faces. During the recall phase, participants were then asked to name the same persons depicting different emotional expressions (neutral, happy, angry, and fearful). Females were faster than males at naming male faces, and males were faster than females at naming female faces. All participants were faster at naming neutral or happy female faces than neural or happy male faces. These results suggest that opposite-sex faces require less processing time than same-sex faces, which is consistent with an evolutionary account.     

Valuing myself over others: The Dark Triad traits and moral and social values

In samples from America and Germany (N = 1353), we examined how the Dark Triad traits related to different value systems as measured by Moral Foundations and Social Values. Psychopathy was linked to diminished concerns for all Moral Foundations, Machiavellianism was linked to a moral flexibility, and narcissism was linked to a socially desirable form of morality. Machiavellianism and psychopathy scores were associated with a devaluing of collective interests, whereas narcissism was associated with a valuing of individual interests through the value of Self-Enhancement. Individual differences in a variety of values mediated part of the sex differences in the Dark Triad traits. We contend that what makes the Dark Triad traits unique and interesting is that they share a unique complex of values that might run counter to societal expectations for selflessness.