“…Yet, in a recent review of 17 studies investigating the cognitive status vulnerability hypothesis, Mirotznik and Los Kamp (2000) found 12 studies lacked a comparison group of nonmovers (Aldrich, 1964;Friedman et al, 1995;Guttman & Herbert, 1976;Kral, Grad, & Berenson, 1968;Lander et al, 1997;Lieberman & Tobin, 1983, pp. 151-152;Markus, Blenkner, Bloom, & Downs, 1972;Marlowe, 1974;Miller & Lieberman, 1965;Nirenberg, 1983;Ogren & Linn, 1971). Without a comparison group, one cannot rule out the possibility that the greater mortality and/or morbidity among relocated residents who are cognitively impaired may merely reflect the fact that such residents deteriorate at a higher rate in general, regardless of the occurrence of relocation (Coffman, 1983;van Dijk, Dippel, & Habbema, 1991).…”