School and Life Lessons Share the Same Psychological Basis

A new study published in *Intelligence* finds that the ability to acquire factual information in formal classrooms and through everyday experiences stems from a single underlying mental capacity. The researchers argue that “human knowledge is a deeply unified trait, regardless of the setting in which it is acquired.” This challenges the traditional view that school-based learning and informal learning are distinct cognitive processes.

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The experiment involved 348 German adults aged 30-40, a range chosen to capture extensive life experience while avoiding advanced cognitive aging. Participants completed a standard 60-question school-based knowledge test and a newly created 66-question everyday-knowledge test covering domains such as agriculture, modern technology, and the arts. Each everyday question was paired with a biographical yes-or-no item (e.g., having disassembled a computer) to link specific experiences to knowledge. The sample was balanced across educational backgrounds in line with German Federal Statistical Office quotas, and participants also answered questionnaires measuring openness and intellectual engagement.

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Statistical analysis showed “the scores for school-based knowledge and everyday life knowledge matched up perfectly on a statistical level,” with an “incredibly strong” underlying mathematical relationship, indicating no true separation between the two knowledge types. General intellectual curiosity predicted performance on both tests equally, and highly curious individuals “tend to absorb more information across the board.” At the item level, personal experience boosted specific answers: “If a participant had actually disassembled a computer, they were much more likely to answer the computer hardware question correctly, even after the researchers statistically adjusted for the participant’s overall intelligence level.”

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The authors note several constraints: the study’s narrow age bracket and exclusive German sample may limit generalizability, and pinpointing the exact source of any particular fact remains difficult. They also acknowledge the possibility that knowledge gaps could motivate new experiences, complicating causal interpretations. Future research aims to track individuals longitudinally to map when life events translate into retained knowledge and to refine intelligence assessments that better reflect diverse learning pathways.

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• “Human intelligence is traditionally divided into two broad conceptual categories by psychologists.” — *PsyPost* article

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• “The research, published in the journal Intelligence, suggests that human knowledge is a deeply unified trait, regardless of the setting in which it is acquired.” — *PsyPost* article

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• “When the researchers analyzed the test results, they found that the scores for school-based knowledge and everyday life knowledge matched up perfectly on a statistical level.” — *PsyPost* article

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• “The underlying mathematical relationship between the two types of knowledge was incredibly strong, indicating no true separation between them.” — *PsyPost* article

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• “Highly curious individuals tend to absorb more information across the board, demonstrating a consistent drive to figure out how the world works.” — *PsyPost* article

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