In a long - term study, researchers gave a group of four - year - old children one marshmallow each and told them that they could either eat the one marshmallow right away or wait a brief period and receive another marshmallow as a reward for their patience.
અમુક નિષ્ણાતોએ ઘણાં વર્ષો સુધી એક અભ્યાસ કર્યો. તેમણે ચાર વર્ષના અમુક બાળકોને ચોકલેટ આપી.