Similarly, theories of informant accuracy posit that those with accurate domainknowledge provide more reliable responses with less error than those without such knowledge (Romney et al.,1986; Romneyand Weller,1984; Sudman et al.,1996; Weller and Romney,1988). Their observations will cluster around a single“truth”whileinaccurate observations (i.e. error) will be randomly scattered around the truth; that is, error is inhomogeneous and does nottypically converge around a small number of data points.