Reading Finnish compound words: eye fixations are affected by component morphemes

Area of Science:

• Psycholinguistics
• Cognitive Psychology
• Computational Linguistics

Background:

• Morphemic processing is crucial for reading comprehension.
• Understanding how readers process complex words, like Finnish compounds, offers insights into reading mechanisms.
• Previous research has not fully elucidated the specific roles of morpheme length and frequency in real-time reading.

Purpose of the Study:

• To investigate the influence of morpheme length and frequency on the eye movement patterns during the reading of Finnish compound words.
• To differentiate the effects of morpheme properties from orthographic factors.

Main Methods:

• Two experiments were conducted using eye-tracking methodology.
• Participants read sentences containing two-morpheme Finnish compound words.
• Variables manipulated included component morpheme length, initial morpheme uniqueness, word familiarity, and word length.

Main Results:

• The length of the initial morpheme affected fixation locations and durations, but not overall gaze duration.
• The frequency of the initial morpheme significantly impacted first fixation duration, gaze duration, and fixation locations.
• Orthographic factors like bigram frequency were unlikely to explain the observed morphemic effects.

Conclusions:

• Morphemic structure, specifically initial morpheme length and frequency, plays a significant role in visual word recognition during reading.
• These findings contribute to a deeper understanding of how morphological complexity affects reading processes.
• The study highlights the importance of considering morphological units in reading models.