Subvocalization rate versus other predictors of the memory span.

Area of Science:

• Cognitive Psychology
• Neuroscience
• Speech Science

Background:

• Immediate memory span is a key cognitive function.
• Predicting memory span accurately is crucial for understanding cognitive abilities.
• Subvocalization rate, or internal speech speed, has been proposed as a potential predictor.

Purpose of the Study:

• To determine the predictive accuracy of subvocalization rate on immediate memory span.
• To compare subvocalization rate with other subject and stimulus variables in predicting memory span.
• To investigate the relationship between internal speech rate and cognitive functions.

Main Methods:

• Two experiments were conducted involving memory span and free-recall tests.
• Measures included silent and whispered subvocalization rates, speaking rate, and silent reading rate.
• Data from 24 subjects in Exp. 1 and 40 subjects (ages 7-17) in Exp. 2 were analyzed using correlation and regression.

Main Results:

• Silent subvocalization rate showed the highest zero-order correlation (r = .80) with memory span in Exp. 1.
• Multiple regression confirmed subvocalization rate as the best predictor (partial r = .31) of memory span.
• In Exp. 2, age and subvocalization rate were the strongest predictors (partial r = .37 and .29, respectively).

Conclusions:

• Immediate memory span is more closely related to internal speech rate than other cognitive functions.
• Subvocalization rate is a significant predictor of memory span across different age groups.
• These findings underscore the importance of speech-related processes in immediate memory.