More on Lexical Bias: How Efficient Can a "Lexical Editor" Be?

Area of Science:

• Psycholinguistics
• Cognitive Psychology
• Speech Production

Background:

• The lexical bias effect, where speech errors favor real words over nonwords, has been debated for decades.
• Two main theories explain this effect: a strategic lexical editor or automatic phonological-lexical feedback.
• Previous research has not definitively distinguished between these two accounts.

Purpose of the Study:

• To experimentally investigate the role and timing of a strategic lexical editor in speech production.
• To compare the performance of an explicit, experimentally induced lexical editor with standard lexical decision tasks.
• To determine if strategic lexical editing is a significant factor in everyday speech error generation.

Main Methods:

• Developed a novel experimental paradigm requiring participants to perform an inner lexical decision task on planned speech.
• Compared reaction times in conditions with and without the requirement for lexical editing.
• Conducted three experiments to validate the findings across different task variations.

Main Results:

• The experimentally implemented "lexical editor" required approximately 300 ms to identify and suppress nonwords.
• Reaction time differences indicated a measurable, albeit strategic, editing process.
• The findings suggest that such strategic editing is not a constant or automatic process.

Conclusions:

• Strategic lexical editing is a feasible cognitive process that can be experimentally demonstrated.
• The time required for this strategic editing suggests it is unlikely to operate consistently during rapid, natural speech.
• The lexical bias effect in spontaneous speech errors likely arises from mechanisms other than continuous strategic lexical editing.