People subvocalize during internal monologue
Evidence from cognitive psychology, reading research, and neuroimaging consistently demonstrates that people engage in subvocalization or covert articulation during internal monologue and silent reading.
The retrieved papers provide robust support for the claim that people subvocalize during internal monologue or silent reading. Studies on phonological coding (Paper 2), reading speed training targeting subvocalization (Paper 8), and decoding imagined or inner speech using neuroimaging and electrophysiology (Papers 10, 11) all confirm this phenomenon without any papers refuting it.
Leinenger M. Phonological coding during reading.. 2014. https://doi.org/10.1037/a0037830
Paper 2 discusses phonological coding and silent reading, highlighting the role of sound-based codes during internal processing.
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Ferguson MA, Nielsen JA, Anderson JS. Altered resting functional connectivity of expressive language regions after speed reading training.. 2014. https://doi.org/10.1080/13803395.2014.908825
Paper 8 describes reading speed training aimed at reducing the practice of articulating words in one's thoughts, known as subvocalization.
Zhao R, Bai Y, Zhang S, Zhu J, Liu H, Ni G. An open dataset of multidimensional signals based on different speech patterns in pragmatic Mandarin.. 2025. https://doi.org/10.1038/s41597-025-06213-z
Paper 10 notes that inner and imagined speech share underlying neurological signals that can be captured across multiple modalities.
Milyani AH, Attar ET. Deep learning for inner speech recognition: a pilot comparative study of EEGNet and a spectro-temporal Transformer on bimodal EEG-fMRI data.. 2025. https://doi.org/10.3389/fnhum.2025.1668935
Paper 11 investigates inner speech classification using EEG and fMRI, confirming the physiological reality of covert articulation.
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