Comment on the validity and reliability of the following:
a. A respondent's report of an intention to subscribe to Consumer Reports is highly reliable. A researcher believes that this constitutes a valid measurement of dissatisfaction with the economic system and alienation from big business.
b. A general-interest magazine claimed that it was a better advertising medium than television programs with similar content. Research had indicated that for a soft drink and other test products, recall scores were higher for the magazine ads than for 30-second commercials.
c. A respondent's report of frequency of magazine reading consistently indicates that she regularly reads Good Housekeeping and Gourmet and never reads Cosmopolitan.