Attention decrement, temporal variation, and the primacy effect in impression formation

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Abstract
Three experiments which tested the attention decrement explanation of the primacy effect in impression formation are reported. A memory-crowding interpretation of attention decrement would predict a decrease in primacy as the interval between traits is increased. Mild support was obtained in Experiment I but not in II or III. Overall. the magnitude of the primacy effect was independent of intertrait temporal variation. Decrement in attention is the most attractive theoretical explanation for the commonly obtained primacy effect. However, the results of the present series of studies suggest that this explanation is not tenable and that other theoretical mechanisms will be required to account for primacy effects.