The role of visual attention in saccadic eye movements

Hoffman, James E.; Subramaniam, Baskaran · 1995 · Perception & Psychophysics

DOI: 10.3758/bf03206794

archive: archived pipeline: cataloged verified

Get this paper ↗ (DOI — opens at the source; we link to it, we don't host it)

Summary

This study investigates the relationship between covert visual spatial attention and voluntary saccadic eye movements, addressing whether attention is a necessary mechanism for generating saccades. The authors challenge the view that attention and eye movements are independent processes, proposing instead that visuospatial attention guides the programming and execution of saccades. Previous research yielded mixed results due to methodological flaws, such as the use of peripheral cues that automatically capture attention or reaction time measures susceptible to dual-task interference. To resolve these issues, Hoffman and Subramaniam conducted two experiments using a dual-task paradigm that separated attentional cues from saccade initiation signals and measured attention via detection accuracy rather than reaction time. In Experiment 1, seven subjects were required to make a saccade to a cued location while simultaneously detecting a briefly presented visual target (a letter) at one of four locations. The target array was removed before the saccade began, ensuring that detection relied on pre-saccadic attention rather than foveation. Results showed that detection accuracy was highest when the target appeared at the saccade destination, intermediate when no saccade was required, and lowest when the target appeared at a location different from the saccade target. This indicates that subjects automatically allocated attention to the saccade destination, enhancing perceptual processing at that location. Experiment 2 tested whether this link is obligatory by explicitly instructing subjects to attend to a specific location while making saccades to either the same or a different location. Despite explicit instructions to attend to a location distinct from the saccade target, superior target detection occurred at the saccade location regardless of the attentional cue. This finding demonstrates that subjects cannot effectively dissociate the locus of attention from the destination of an upcoming saccade; the oculomotor system appears to override explicit attentional instructions. The results support the "oculomotor readiness hypothesis," suggesting that shifts of attention and saccades are mediated by shared neural circuitry. The study concludes that visuospatial attention is an integral component of voluntary saccade generation, serving to enhance perceptual processing at the intended destination prior to eye movement. This implies that attention is not merely a passive consequence of eye movements but an active mechanism that prepares the visual system for the upcoming fixation, thereby facilitating efficient visual exploration.

Key finding

Visuospatial attention is obligatorily directed to the destination of a voluntary saccade, making it impossible to attend to one location while moving the eyes to another.

Methodology

lab_experiment

Sample size: 14

Provenance

The full processing record for this entry. Every stage of this paper's journey through the pipeline is logged — what ran, with which tool and model, how many attempts it took, and when it last completed. Discovered via author_sweep_intake on 2026-05-28 (2 acquisition events logged).

Summary generated by qwen3.6-27b-prismaquant on 2026-06-10; verification: verified.

Topics

Ranked by relevance to this paper. Hover a topic for its definition.

• peripheral attention
• eye movements scanning
• gaze based attention detection
• attention selective divided
• inattentional change blindness
• useful field of view