Table 2.

Example of Side-by-Side Comparison of Lay and Expert Model

Expert Model Node	Lay Model Node(s)	Domain Difference
Silica particles in soil	Cold morning dew Snake and worms Bacteria	Misunderstanding
Built environment	Poverty	Extra Knowledge
Cultural norms		Gap
Inherited susceptibility to inflammation from soil exposure	Heredity (i.e., disease passed by blood) Contagion	Extra Knowledge
	Malnutrition	Extra Knowledge
Shoe access	Wearing shoes	Misunderstanding
	Weakened immunity Vaccination	Extra Knowledge
Walking barefoot	Walking barefoot	Shared Knowledge

Cells in the table were coded to indicate four domain differences: (1) expert noted, lay did not (gap); (2) expert did not note, lay did (extra knowledge); and (3) noted by both expert and lay but described in different causal role (misunderstanding); (4) node included in both and path described similarly (shared knowledge).