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Related Experiment Video

Updated: Jul 5, 2026

Interaction between Phonological and Semantic Processes in Visual Word Recognition using Electrophysiology

Interaction between Phonological and Semantic Processes in Visual Word Recognition using Electrophysiology

Published on: June 29, 2021

Phonological representations are unconsciously used when processing complex, non-speech signals.

Mahan Azadpour¹, Evan Balaban

¹Cognitive Neuroscience Sector, SISSA (International School for Advanced Studies), Trieste, Italy.

|April 17, 2008

Summary

Subjective judgments of artificial speech sounds can be misleading. Even when not consciously perceived as speech, these sounds may unconsciously engage speech-like processing, influencing neuroimaging results.

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Infant Auditory Processing and Event-related Brain Oscillations

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Last Updated: Jul 5, 2026

Interaction between Phonological and Semantic Processes in Visual Word Recognition using Electrophysiology

Interaction between Phonological and Semantic Processes in Visual Word Recognition using Electrophysiology

Published on: June 29, 2021

Infant Auditory Processing and Event-related Brain Oscillations

Infant Auditory Processing and Event-related Brain Oscillations

Published on: July 1, 2015

Area of Science:

Neuroscience
Auditory Perception
Speech Processing

Background:

Neuroimaging studies often use artificial speech-like sounds.
Perceptual status of these sounds is typically based on subjective judgments.
Brain activation patterns are interpreted based on these subjective assignments.

Purpose of the Study:

To evaluate the perceptual status of spectrally-rotated speech in naïve subjects.
To investigate whether perception of artificial speech relies on acoustic or phonological processing.
To determine if subjective assessments of artificial speech sounds are reliable for neuroimaging interpretation.

Main Methods:

Conducted discrimination experiments with naïve subjects on spectrally-rotated syllables.
Performed forced identification experiments on the same stimuli with a separate group of naïve subjects.
Analyzed acoustic and phonetic similarities in vowel perception using formant frequency values.

Main Results:

Discrimination of spectrally-rotated syllables correlated with phonological identification patterns.
Perception was significantly and independently influenced by both acoustic and phonological information.
Naïve subjects' discrimination abilities were linked to similarity judgments.

Conclusions:

Simple subjective assessments of artificial speech-like sounds can be misleading.
Unconscious, speech-like, phonological processing may occur even for sounds not consciously perceived as speech.
Findings suggest a more complex underlying processing of artificial auditory stimuli than previously assumed.