The contribution of frequency and semantic similarity to morphological processing

Area of Science:

• Psycholinguistics
• Cognitive Science
• Computational Linguistics

Background:

• Morphologically complex words (e.g., 'running', 'careful') are common in language.
• Understanding how the brain processes these words is key to understanding language comprehension.
• Previous research has explored factors like word frequency and semantic similarity in word processing.

Purpose of the Study:

• To investigate the interactive roles of word frequency and semantic relatedness in processing morphologically complex words.
• To examine how different types of word forms (inflections vs. derivations) are processed.
• To explore the time course (stimulus onset asynchrony - SOA) of these effects.

Main Methods:

• Two experiments were conducted using priming paradigms.
• Participants saw unaffixed target words preceded by either inflected or derived primes.
• Primes varied in frequency (high vs. low), and SOA was manipulated in Experiment 2.

Main Results:

• Low-frequency inflections and derivations showed similar priming effects.
• High-frequency inflections yielded greater priming than high-frequency derivations.
• The difference in priming between inflections and derivations increased with longer SOAs.

Conclusions:

• Word frequency and semantic similarity interact to influence morphological priming.
• These findings provide insights into the cognitive mechanisms underlying the processing of complex words.
• Results inform theoretical models like dual-route and connectionist accounts of word recognition.