The main idea of the attached passage is ____.
Many past studies may have overestimated human generosity, if a new piece of research is any clue.
The study recreated a game often used in laboratory experiments to assess people’s willingness to give away money, or their altruism.
Participants are typically granted anonymity. But the new study was designed to afford an assurance of anonymity even more believable than usual. It was set up so that participants would be unaware any experiment was even happening – or that any decision would even be counted, let alone watched.
Under this seemingly greater level of secrecy, the level of giving plunged to zero.
Retrieved from: http://www.world-science.net/exclusives/130617_altruism.htm
giving to others is good, but only when you get some recognition or credit for doing so
participating in a scientific experiment can yield important results for social understanding
when giving is done anonymously, it may not be done at all
people are more likely to give to others when no one is watching
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