Fairfield and Fletcher's 2002 review of vitamin benefits and risks states that vitamin A is critical for night vision, but in doses as small as 3x the RDA, can cause birth defects. Katz et al (1995) found that night blindness was prevalent among lactating and pregnant Nepalese women, which they attributed to vitamin A deficiency, although Wedner ( Read more... )

Jiang et al (2006) tested the effect of "invisible" erotic pictures on the attention of gay/bisexual and heterosexual males and females. After comparing attraction/repulsion to male or female erotic stumuli, Jiang et al found that while gay men responded like heterosexual women to the suppressed images, gay/bisexual women responded in between this ( Read more... )

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Gender differences are often thought to be largely the result of socialization. Many researchers use infant studies as a way to avoid the complications of socialization effect. Connellan et al (2000) found that newborns males would spend more time looking at a mobile whereas female newborns would spend more time looking at a face. This study was ( Read more... )

Humans make judgements about the perceived gender of other humans so quickly that we are usually not aware of having done it. What factors influence these snap decisions? Ganel et al (2002) suggest that identity and gender are inseparably linked in cognitive facial recognition. This is in contrast to other models that suggest identity and sex ( Read more... )

Krause et al. (1982) surveyed vision correction in 14 year olds in Finland. They found that girls were more likely than boys to have corrective lenses, but that when boys did need correction, their cases of myopia or hyperopia were more pronounced. This suggests that the boys (or perhaps their parents) had a higher threshold for correction- ( Read more... )