> Think about Japan, where kids are often taught to wait quietly for meals or gifts Author got the country and items correct but not associated correctly. In Japan, kids pass the marshmallow test with flying colors but fail the same test if it's a gift. In America kids generally pass the gift test (hypothesis is that they're used to waiting for presents on Christmas). source - https://www.scientificamerican.com/artic…
Marshmallow test is one of those things real psychologists (whether practical or science) just do not care all that much about, but pop culture is sure obsessed with it.
[0] https://www.theguardian.com/education/2018/jun/01/famed-impu...