Researchers K. Anders Ericsson and Herbert Simon studied verbal protocol analysis and found that verbalizing thoughts improves problem-solving accuracy because it forces you to structure reasoning explicitly. In interviews, this works both ways: you clarify your own thinking by speaking it, and the interviewer gains evidence of your analytical ability. Silent problem-solving hides the 90% of your work that happens before you write code.
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$ curl repovive.com/roadmaps/communication-skills/the-think-aloud-protocol/the-science-ericsson-simon
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