食指與無名指之比和健康行為等的關聯

量一量你的食指和無名指：

維基上的這個2D:4D和一些生理特征相關性的表格:

食指和無名指之比大的話，精神分裂症風險較大，不易對酒精和遊戲上癮，男性肥胖、心髒病、抑鬱症的風險較大，但前列腺癌風險較小，考試容易更好等等等等。。。

量了一下，我的食指和無名指之比<1，難怪我考不進清華北大哈。。。

Correlation between digit ratio and traits

Some authors suggest that digit ratio correlates with health, behavior, and even sexuality in later life. Below is a non-exhaustive list of some traits that have been either demonstrated or suggested to correlate with either high or low digit ratio.

圖表：　http://en.wikipedia.org/wiki/Digit_ratio

	Low digit ratio	High digit ratio
Physiology and disease		Lowered sperm counts [40] Increased risk for heart disease in males[41] Increased risk of obesity and metabolic syndrome in males[42] Reduced risk for prostate cancer[43] Reduced birth size in males[44][45]
Psychological disorders	Increased rate of ADHD in males[46][47][48][49] Reduced risk in females for anorexia nervosa[50] and in males for eating disorders[51]	Reduced rate of autism and Asperger syndrome[52] Increased risk for depression in males[53] Increased rate of schizophrenia[54] Increased rate of psychopathy in females [55] Reduced risk of alcohol dependency[56] Reduced risk of video game addiction[57] Increased Anxiety in males[58]
Physical and competitive behavior		Reduced performance in sports[59] Reduced financial trading ability[60] Right handedness Skills [61] (inconclusive)[62]
Cognition and personality	Assertiveness in females[5] Aggression in males[13][63] Masculinity of Handwriting[64] Perceived 'dominance' and masculinity of man's face[65][66] In an orchestral context, rank and musical ability in males[67]	Personality traits correlated with digit ratio, higher being more feminized[68][69][70] Paranormal and superstitious beliefs among men with a higher digit ratio[71] Higher exam scores among male students[29][72]
Management	Leadership[73] Innovation[74]
Sensory Perception		Smell perception[75] Color perception[76] Tactile perception[77]
Sexual orientation	Lesbians have a lower digit ratio, on average, than heterosexual women;[78][79][80][81][82][83][84][85][86][87][88][89]	Sexual preference for more masculine men among women[78] and gay men[90] with high digit ratio; a preference for a masculine facial type means a more "feminized" mindset. Lesbians are more likely to be femme and less likely to be butch with a high digit ratio.[80][91] Identical female twins discordant for sexual orientation still show the difference (lesbian less than straight, on average) in digit ratio.[82][92] Homosexuality for men,[81][93] but this is disputed,[88][94] and subject to geographic variations [95]

See also: Biology and sexual orientation and Neuroscience and sexual orientation § 2D:4D digit ratio