“…Although classification of findings is difficult because of the differing time intervals investigated, some studies which have found complete decay are Chen (1936), Insko, Arkoff, and Insko (1965), Kelman (1958Kelman ( , 1960, and Sims (1938). Some studies which have found partial persistence are Annis and Maier (1934), Cherrington and Miller (1933), Dietrich (1946), Dillehay, Insko, and Smith (1966), Hall (1938), Kelman (1960), McGuire (1957McGuire ( , 1960, Mitnick and McGinnies (1958), Papageorgis (1963), Peterson and Thurstone (1933), Smith (1943), Stotland, Katz, and Patchen (1959), Watts and McGuire (1964), and Weiss (1953). Studies which have found complete or near complete persistence are Cohen (1957), Elms (1966), Kelman (1958Kelman ( , 1960, Newcomb (1963), Peterson and Thurstone (1933), and Watts (1967).…”