Earlier quoted context omitted.
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.
The original paper has been cited 2000 times: https://scholar.google.com/scholar?hl=en&as_sdt=0%2C5&scioq=... That's a lot of citations for something they 'just do not care' about.
But do bear in mind, an intro textbook for a 101 class aiming to correct popular misunderstandings; or an experimental guide wanting to give examples of mistakes one should avoid; or an article on the replication crisis would also count as citations, even as they sneered at the original faulty work.