Mixed-sex interactions may harm thinking.

Researchers performed two studies. In the first, participants interacted either with a same-sex or opposite-sex partner. Results showed that men’s cognitive performance declined from a mixed-sex encounter, but this wasn’t true for women. Interacting with women can impair men’s cognitive functioning; Johan C. Karremans; Journal of Experimental Social Psychology; Volume 45, Issue 4, July 2009, Pages 1041–1044

Intelligence is connected with sperm quality

Researchers found correlations between intelligence and sperm concentration, sperm count, and sperm motility. The sample consisted of 405 U.S. Army Veterans. Scientists took notice of age, body mass index, days of sexual abstinence, service in Vietnam, or use of alcohol or drugs. Rosalind Arden, Linda Gottfredson, Intelligence and Semen Quality are Positively Correlated, Intelligence 37(3):277-282 · May 2009, DOI: 10.1016/j.intell.2008.11.001  

Intelligent men are always attractive

A group of 204 women were evaluated based on the long- and short-term appeal of videos of 15 men. They had a known level of intelligence and physical features. Findings say that women look for geniuses for both one-night stands and for long-term relationships. However, other studies suggest that women don’t care about the brain […]

An experiment proved that whether we are happy or not with our appearance affected our intellectual functioning.

  A study of approx. 390 participants showed that those who feel better about their body (wearing sweaters) performed better on math tests. The second group tested swimsuits. Hebl, M., King, E., & Lin, J. (2004). The swimsuit becomes us all: Ethnicity, gender, and vulnerability to self-objectification. Personality and Social Psychology Bulletin.

Mom's high blood pressure lowered child’s IQ by 4.36 points and for math ability.

Researchers looked at the medical records for mothers’ blood pressure during pregnancy. They checked 398 men. They tested their abilities at age 20 and again at age 69. The tests checked language skills, math reasoning, and visual and spatial relationships. It turned out that those men whose mothers had high blood pressure while pregnant scored […]

Latitude is correlated with IQ and height.

The Japanese average IQ has been estimated to be 104. It is slightly lower than the Chinese and Korean averages.   The the highest IQ, in prefecture Akita, had 107 while the one with the lowest (Okinawa) had 96. This is surprising in that it challenges the much-touted homogeneity of Japanese people.   Further, people living […]