Word order effects in sentence reading.

Area of Science:

• Cognitive Psychology
• Computational Linguistics
• Neuroscience

Background:

• Current reading models like SEAM and OB1-Reader propose parallel lexical processing, while E-Z Reader suggests serial processing.
• Models differ on how sentence-level representations are formed, particularly concerning word order.

Purpose of the Study:

• To investigate how readers detect and process sentential anomalies like word transpositions and ungrammatical final words.
• To evaluate theoretical claims of parallel versus serial word processing models using eye-tracking data.
• To assess the impact of word order and grammaticality on reading fluency and eye movement control.

Main Methods:

• An eye-tracking experiment was conducted with manipulations of target word pairs (transposed vs. non-transposed) and final word grammaticality (grammatical vs. ungrammatical).
• Readers' ability to judge sentence grammaticality under different anomaly conditions was assessed.
• Eye movement metrics, including fixation durations and re-reading patterns, were analyzed.

Main Results:

• Readers were more accurate in judging grammaticality when both word transpositions and ungrammatical final words were present.
• Transposed words significantly disrupted reading, but only after the first word of the pair was fixated.
• Ungrammatical final words attracted more fixations and re-reading, especially when not preceded by a transposition.

Conclusions:

• The findings challenge parallel lexical processing claims, supporting serial processing models like E-Z Reader.
• Canonical word order is essential for natural, undisrupted reading and effective eye movement control.
• Reading anomalies reveal critical insights into the sequential nature of word identification and sentence comprehension.