There was a study I particularly liked in which a group of depressed and a group of non-depressed people were asked to play a video game for an hour, and at the end of the hour, they were asked how many little monsters they thought they had killed.
Houve um estudo  de que eu gostei especialmente em que pessoas deprimidas e pessoas não-deprimidas foram convidadas a jogar  um jogo vídeo durante uma hora. No final dessa hora, perguntaram-lhes quantos monstrinhos achavam que tinham matado.