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.
भावनिक रीत्या, सामाजिक रीत्या व त्यांच्या शालेय अभ्यासात ती संतुलित होती.