A group of researchers in Germany and Sweden recruited 39 competitive male chess players, who had an average IQ of 127 and an average chess Elo rating of about 1700 (an above-average rating in the system used to determine serious players’ skill level). They divided the group to test their performance after consuming either 200 mg of modafinil, 20 mg of ritalin, 200 mg of caffeine, or a placebo.

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Benjamin Zand: The use of so-called smart drugs is growing in popularity. But do they work?

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Want to sign up for a massive human experiment? Too late. You’re already a lab rat. There was no ethics approval or informed consent. You weren’t asked, you never signed up, and now there’s no easy way to opt out

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As the school year winds down, it’s safe to assume that many college students used stimulants such as Ritalin and Adderall to get through finals. While the students may have been motivated to improve their odds of getting good grades, a new study suggests that students’ reasons for taking simulants isn’t so blatantly opportunistic

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