The authors investigated whether emotional pictorial stimuli are especially likely to be processed in parafoveal vision. Pairs of emotional and neutral visual scenes were presented parafoveally (2.1°or 2.5°o f visual angle from a central fixation point) for 150 -3,000 ms, followed by an immediate recognition test (500-ms delay). Results indicated that (a) the first fixation was more likely to be placed onto the emotional than the neutral scene; (b) recognition sensitivity (AЈ) was generally higher for the emotional than for the neutral scene when the scenes were paired, but there were no differences when presented individually; and (c) the superior sensitivity for emotional scenes survived changes in size, color, and spatial orientation, but not in meaning. The data suggest that semantic analysis of emotional scenes can begin in parafoveal vision in advance of foveal fixation.Keywords: parafoveal, perception, emotional, scenes, pictorial stimuli
Parafoveal Semantic Processing of EmotionalVisual ScenesThe present study addresses the issues of whether emotional visual scenes are especially likely to be perceived outside the spatial focus of attention, in comparison with nonemotional scenes, and the kind of content that is processed when these pictorial stimuli are presented in parafoveal vision. Because of the optical properties of the neural structure of the retina of the eyes, the quality of visual information falls off rapidly and continuously from the center of the fixation placement. The spatial field of vision can be divided into three regions: foveal, parafoveal, and peripheral. Acuity is maximal in the fovea (the central 2°of vision), it decreases in the parafovea (which extends out to 5°on each side of foveal fixation), and it is even poorer in the periphery (beyond the parafoveal boundaries). Foveal vision corresponds to the spatial focus of overt attention. Parafoveal and peripheral vision involve perception outside the focus of attention. There is a controversy regarding what type of information can be obtained from parafoveal and peripheral vision of scenes (for reviews, see Rayner, 1998).
Parafoveal and Peripheral Processing of Pictorial StimuliRayner and Pollatsek (1992) argued that meaningful information can be extracted further from fixation in scenes than in text, thus suggesting a larger perceptual span for pictorial than for verbal stimuli. Henderson, Weeks, and Hollingworth (1999) have put forward a model of eye movement control in scene viewing that specifies the role of semantic processing for stimuli located out of foveal fixation. This model is meant to account for fixation placement and fixation duration. Initially, eye movements and fixation placement are determined by low-level visual features of stimuli such as luminance, contrast, color, and so forth. Once the eyes land on a region, the amount of time they remain at that place is determined by the successful completion of processing, which involves both perceptual and cognitive analysis. Semantic factors such as informativeness, consi...