Developmental changes in strategies for gathering evidence about biological kinds

Emily Foster-Hanson, Marjorie Rhodes & Kelsey Moty
How do people gather samples of evidence to learn about the world? Adults often prefer to sample evidence from diverse sources—for example, choosing to test a robin and a turkey to find out if something is true of birds in general. Children below age 9, however, often do not consider sample diversity, instead treating non-diverse samples (e.g., two robins) and diverse samples as equivalently informative. The current study (N = 249) found that this discontinuity...
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