Robert B. Zajonc

TL;DR: The exposure-attitude hypothesis as discussed by the authors suggests that mere repeated exposure of the individual to a stimulus object enhances his attitude toward it, i.e., exposure is meant a condition making the stimulus accessible to the individual's perception.

TL;DR: Lazarus has challenged the view that there are circumstances under which affect precedes cognition and that affective arousal that does not entail prior cognitive appraisal exists as mentioned in this paper, however, his argument is based entirely on an arbitrary definition of emotion that requires cognitive appraisal as a necessary precondition.

TL;DR: The affective primacy hypothesis, which asserts that positive and negative affective reactions can be evoked with minimal stimulus input and virtually no cognitive processing, is tested by comparing the effects of affective and cognitive priming under extremely brief and longer exposure durations.