# Rapid Mandarin Tone Learning in Passive and Active Listening: A Magnetoencephalography Study

## TL;DR

This study shows that adults can quickly learn to detect Mandarin tone changes through short daily listening sessions, with both behavioral and brain activity improvements.

## Contribution

The study provides new insights into rapid phonetic learning using combined behavioral and MEG measurements over four days.

## Key findings

- Behavioral accuracy improved immediately after the first day of training.
- M200 amplitude increased during active listening from Day 1 to Days 2 and 3.
- M215 amplitude increased during passive listening after Day 1 and remained stable.

## Abstract

Adults can learn to represent foreign phonetic features, but only a few studies have tracked the phonetic learning process using both behavioral and brain activity measurements over several days. This study examined how 4 days of listening to changes in Mandarin tones on the vowel /a/ affect behavioral change detection and modulate magnetoencephalography (MEG) responses in native Finnish‐speaking adults (n = 9). On each day, participants completed one 25‐min passive listening session and one 45‐min active listening training session during which they responded behaviorally to tone changes. We found that behavioral accuracy improved immediately after the first day, and reaction times were faster on Days 3 and 4 compared with Day 1. In terms of brain activity, the amplitude of the M200 component, corresponding to the N2b in electroencephalography, increased during active listening from Day 1 to Days 2 and 3. No significant changes were observed in active listening in the M350 amplitude, which corresponds to the P3b component. During passive listening, an increase in the amplitude of the M215 response, corresponding to mismatch negativity, was observed after Day 1 and remained stable thereafter. These findings suggest that a single listening session of foreign speech sounds can modulate adults' behavioral and neural responses to phonetic changes, but replication with a larger sample is needed to confirm these effects.

This study investigated how 4 days of passive and active listening to Mandarin tone changes in /a/ affected behavioral change detection and MEG responses in native Finnish‐speaking adults. Perceptual learning of foreign speech sounds was reflected in enhanced magnetic mismatch negativity and N2b as well as improved behavioral accuracy. All measures improved after one brief learning session.