This research examined how brand congruity in joint advertising affects individuals' processing of advertising messages. An experiment was conducted whereby ads promoting two congruent or incongruent brands were presented to subjects under low versus high processing load. Results showed that advertising messages for congruent brands were better remembered under both high and low processing loads. However, ads with congruent brands led to positive attitudes only when subjects' processing resources were constrained. These findings suggest congruent brands that appear in joint ads have a clear advantage over incongruent brands. The results have both practical and theoretical implications.
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