One-sided vs. two-sided appeals

One-sided vs. two-sided appeals. Attitude research has shown that consumers often tend to react more favorably to advertisements which either (1) admit something negative about the sponsoring brand (e.g., the Volvo is a clumsy car, but very safe) or (2) admits something positive about a competing brand (e.g., a competing supermarket has slightly lower prices, but offers less service and selection). Two-sided appeals must, contain overriding arguments why the sponsoring brand is ultimately superior--that is, in the above examples, the "but" part must be emphasized.