Related Experiment Video
Updated: Feb 22, 2026

Eye Tracking During Visually Situated Language Comprehension: Flexibility and Limitations in Uncovering Visual Context Effects
Published on: November 30, 2018
Parafoveal preview effects in reading unspaced text
Denis Drieghe1, Gemma Fitzsimmons1, Simon P Liversedge1
1School of Psychology, University of Southampton.
Removing spaces between words during reading slows down processing and limits how much information readers can process simultaneously. This suggests reading focuses on one word at a time when word segmentation is easy.
Area of Science:
- Cognitive Psychology
- Psycholinguistics
- Reading Science
Background:
- English reading relies on inter-word spaces for word boundary identification.
- Parafoveal processing, the processing of words outside the direct line of sight, is crucial for fluent reading.
Purpose of the Study:
- To investigate the impact of removing inter-word spaces on parafoveal processing during reading.
- To examine how word segmentation affects reading efficiency and processing scope.
Main Methods:
- An eye-tracking experiment using the gaze-contingent boundary paradigm.
- Manipulation of word frequency (high/low) and postboundary preview validity (correct/illegal).
- Comparison of reading metrics between spaced and unspaced text conditions.
Main Results:
- Unspaced reading conditions significantly increased reading times, confirming previous findings.
- Limited evidence for distributed processing (spill-over or parafoveal-on-foveal effects) was observed.
- Spill-over effects in unspaced text occurred only with correct previews, suggesting focused processing when segmentation is easy.
Conclusions:
- The reading system tends towards narrowly focused processing of individual words.
- Effective word segmentation, facilitated by spaces, allows for more efficient and potentially distributed processing.
- The presence or absence of visual cues for segmentation heavily influences reading strategy.
More Related Videos
07:12Development of a Gaze-Contingent Display Framework Designed for Perceptual and Oculomotor Research with Simulated Central Vision Loss
Published on: April 11, 2025
05:54Eye-tracking to Distinguish Comprehension-based and Oculomotor-based Regressive Eye Movements During Reading
Published on: October 18, 2018
Related Concept Videos
Depth Perception and Spatial Vision
Visual Agnosia
Framing Effects
First Pass Effect
Depending on the route of administration, drugs can be metabolized in the liver, intestine, lungs, and vasculature. Orally administered drugs are first absorbed through the...