How preview space/time translates into preview cost/benefit for fixation durations during reading

Area of Science:

• Cognitive Psychology
• Psycholinguistics
• Computational Linguistics

Background:

• Reading involves foveal and parafoveal visual processing.
• Parafoveal preview of upcoming words significantly impacts reading efficiency.
• Suppression of parafoveal information leads to reduced reading speed.

Purpose of the Study:

• To reanalyze McDonald (2006) using linear mixed models (LMMs) to investigate preview effects in reading.
• To examine how saccade amplitude and pre-target gaze duration modulate the preview benefit.
• To determine if preview effects are solely beneficial or also include costs, influencing lexical access.

Main Methods:

• Reanalysis of existing reading data using linear mixed models (LMMs).
• Examination of single-fixation duration (SFD) as a measure of processing efficiency.
• Analysis of the interaction between preview type (identical vs. random-letter) and reading metrics (saccade amplitude, pre-target gaze duration).

Main Results:

• Shorter saccade amplitudes (larger preview space) correlated with shorter SFDs for identical previews, but not random-letter previews.
• Longer gaze durations on pre-target words led to longer SFDs on target words, with preview effects varying by preview time.
• An increasing cost of random-letter strings was observed with shorter saccade amplitudes for target gaze durations.

Conclusions:

• Preview effects in reading are a complex interplay of preview benefit and preview cost.
• Parafoveal preview dynamics are modulated by both the spatial extent of the preview (saccade amplitude) and temporal factors (preview time).
• Parafoveal information can both facilitate and interfere with lexical access during reading, challenging simple notions of preview benefit.