“…This same consideration may be a reason for the importance of differences in subjects. Subjects of wide age and education-level Berkowitz & Cottingham (1960), Cohen (1957), Dabbs & Leventhal (1966), Duke (1967), Frandsen (1963), Gollob & Dittes (1965), Leventhal & Niles (1965), Leventhal & Perloe (1962), , Leventhal et al (1967), Millman (1968), Robbins (1962aRobbins ( , 1962b, Stern et al (1965) Hewgill & Miller (1965, Janis & Milholland (1954), Janis & Terwilliger (1962), Kraus et al (1966), , Powell (1965), Powell & Miller (1967) Leventhal & Niles (1964, Leventhal & Singer (1966), Leventhal & Watts (1966), Nunnally & Bobren (1959) Fischer et al (1967, Goldstein (1959), Insko et al (1965), Janis & Feshbach (1953), Janis & Feshbach (1954), Leventhal & Trembly (1968) Moltz & Thistlethwaite (1955 DeWolfe & Governdale (1964( ) Chu (1966 ranges may differ in their knowledge concerning any given topic (although it was found above they do not seem to differ in their perceived familiarity with the topics). For example, Cannel and MacDonald (1956) found that education level interacts with smoking habits in the perception of the relationship between smoking and lung cancer.…”