Word: psychologist
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...host of its compatriots to the complex task of turning a fetus into a boy. Without such a signal, all human embryos would develop into girls. "I have all the genes for being male except this one, and my husband has all the genes for being female," marvels evolutionary psychologist Leda Cosmides, of the University of California at Santa Barbara. "The only difference is which genes got turned...
Subtle sex-linked preferences have been detected as early as 52 hours after birth. In studies of 72 newborns, University of Chicago psychologist Martha McClintock and her students found that a toe-fanning reflex was stronger in the left foot for 60% of the males, while all the females favored their right. However, apart from such reflexes in the hands, legs and feet, the team could find no other differences in the babies' responses...
Oddly enough, men may possess a similar hormonal response, according to new research reported in November by Doreen Kimura, a psychologist at the University of Western Ontario. In her study of 138 adults, Kimura found that males perform better on mental-rotation tests in the spring, when their testosterone levels are low, rather than in the fall, when they are higher. Men are also subject to a daily cycle, with testosterone levels lowest around 8 p.m. and peaking around 4 a.m. Thus, says June Reinisch of the Kinsey Institute: "When people say women can't be trusted because they cycle...
...influence of sex extends far beyond the realm of physical traits. For instance, the inescapable fact that women have eggs and men sperm has spurred the development of separate and often conflicting reproductive strategies. University of Michigan psychologist David Buss has found that men and women react very differently to questions about infidelity. Men tend to be far more upset by a lover's sexual infidelity than do women: just imagining their partner in bed with another man sends their heart rate soaring by almost five beats a minute. Says Buss: "That's the equivalent of drinking three cups...
...macho hot dogs who take too many risks. A new FBI study has determined that most of the 762 U.S. law-enforcement officers killed by suspects in the past decade were especially decent people who just let their guard down. In interviews with 50 cop killers, says FBI forensic psychologist Anthony Pinizzotto, the agency heard again and again that the victims provided an opening when they took it easy on the suspect. To spare one collar the discomfort of being handcuffed behind his back, for example, a policeman cuffed him in front and let him ride in the patrol...