On facts and conceptual systems: young children's integration of their understandings of germs and contagion by Gregg E. A. Solomon and others (1999)

Primary publication: doi.org/10.1037/0012-1649.35.1.113

Primary text, publisher or institutional record: pubmed.ncbi.nlm.nih.gov/9923469/

Relevant evidence: Five studies; matching symptoms with different causes and judgments about germs as biological agents.