Eye fixation related potentials at changed illuminations in the working space

A. Yagi; M. Ito; N. Hirao

doi:10.2150/jieij1980.80.appendix_260

Eye Fixation-Related Potentials during Visual Search on Acquaintance and Newly-Learned Faces

Brain Sciences ◽

10.3390/brainsci11020218 ◽

2021 ◽

Vol 11 (2) ◽

pp. 218

Author(s):

Seungji Lee ◽

Doyoung Lee ◽

Hyunjae Gil ◽

Ian Oakley ◽

Yang Seok Cho ◽

...

Keyword(s):

Emotional Responses ◽

Gaze Behavior ◽

Directed Attention ◽

Attentional Processes ◽

Eye Fixation ◽

P300 Component ◽

Successful Search ◽

Late Positive Potentials ◽

Related Potentials ◽

Face Task

Searching familiar faces in the crowd may involve stimulus-driven attention by emotional significance, together with goal-directed attention due to task-relevant needs. The present study investigated the effect of familiarity on attentional processes by exploring eye fixation-related potentials (EFRPs) and eye gazes when humans searched for, among other distracting faces, either an acquaintance’s face or a newly-learned face. Task performance and gaze behavior were indistinguishable for identifying either faces. However, from the EFRP analysis, after a P300 component for successful search of target faces, we found greater deflections of right parietal late positive potentials in response to newly-learned faces than acquaintance’s faces, indicating more involvement of goal-directed attention in processing newly-learned faces. In addition, we found greater occipital negativity elicited by acquaintance’s faces, reflecting emotional responses to significant stimuli. These results may suggest that finding a familiar face in the crowd would involve lower goal-directed attention and elicit more emotional responses.

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Eye-Fixation-Related Potentials: Insight into Parafoveal Processing

Journal of Psychophysiology ◽

10.1027/0269-8803.19.3.204 ◽

2005 ◽

Vol 19 (3) ◽

pp. 204-215 ◽

Cited By ~ 71

Author(s):

Thierry Baccino ◽

Yves Manunta

Keyword(s):

Target Word ◽

Cognitive Processes ◽

Event Related Potentials ◽

Semantic Relatedness ◽

Word Type ◽

Factors Affecting ◽

Eye Fixation ◽

Related Potentials ◽

The Right ◽

Nonword Processing

Abstract. This paper presents a new methodology for studying cognition, which combines eye movements (EM) and event-related potentials (ERP) to track the cognitive processes that occur during a single eye fixation. This technique, called eye-fixation-related potentials (EFRP), has the advantage of coupling accurate time measures from ERPs and the location of the eye on the stimulus, so it can be used to disentangle perceptual/attentional/cognitive factors affecting reading. We tested this new technique to describe the controversial parafoveal-on-foveal effects on reading, which concern the question of whether two consecutive words are processed in parallel or sequentially. The experiment directly addressed this question by looking at whether semantic relatedness on a target word in a reading-like situation might affect the processing of a prime word. Three pair-word conditions were tested: A semantically associated target word (horse-mare), a semantically nonassociated target word (horse-table) and a nonword (horse-twsui); EFRPs were compared for all conditions. The results revealed that early ERP components differentiated word and nonword processing within 119 ms postfixation (N1 component). Moreover, the amplitude of the right centrofrontal P140 varied as a function of word type, being larger in response to nonassociated words than to nonwords. This component might index a spatial attention shift to the target word and its visual categorization, being highly sensitive to orthographic regularity and “ill-formedness” of words. The P2 consecutive component (peaking at 215 ms) differentiated associated words and nonassociated words, which can account for the semantic parafoveal effect. The EFRP technique, therefore, appears to be fruitful for establishing a time-line of early cognitive processes during reading.

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