It's really difficult working with kids and with babies because they are not cooperative subjects: they are not socialized into the idea that they should cheerfully and cooperatively give you information. They're not like undergraduates, who you can bribe with beer money or course credit.
Paul BloomRelated topics
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Theory should be ever more demanding of our empirical resources. Simultaneously, data should be ever more demanding of the empirical relevance of theory and of the theorist's expertise in working imaginatively on problems of the world, rather than on stylized problems of the imagination.
Vernon L. Smith