When groups face difficult problems, the voices of experts may be lost in the noise of others' contributions. We present results from a "naturally noisy" setting, a large first-year undergraduate class, in which the expert's voice was "lost" to such a degree that bringing forward even more...

Psychologists claim that being treated kindly puts individuals in a positive emotional state: they then treat an unrelated third party more kindly. Numerous experiments document that subjects indeed ‘pay forward’ specific behavior. For example, they are less generous after having experienced...

Do people only reject interference and keep control to affect the outcome? We find that 20% of subjects reject unrequired help and insist on their solution to a problem—although doing so is costly and does not change the result. We tease out the motives by varying the information available to...