Phonetic Effects in Child and Adult Word Segmentation

Area of Science:

• Linguistics
• Developmental Psychology
• Cognitive Science

Background:

• Investigating how children and adults learn new languages is crucial for understanding language acquisition.
• Acoustic patterns and phonetic properties significantly influence word learning and segmentation.
• Previous research suggests adults exhibit phonetic asymmetries in learning, but children's abilities remain less understood.

Purpose of the Study:

• To examine the impact of specific acoustic patterns on word learning and segmentation in children (8-11 years) and college students.
• To compare learning in artificial languages with phonetically natural lenition-fortition patterns versus unnatural antilenition patterns.

Main Methods:

• Participants (22 children, 36 adults) listened to synthesized utterances in artificial languages.
• A two-alternative forced-choice task assessed discrimination between occurring and non-occurring sequences.
• Exposure to both natural and unnatural phonetic patterns was counterbalanced across participants and sessions spaced over a month apart.

Main Results:

• Children showed minimal evidence of learning, regardless of the phonetic pattern.
• Adults demonstrated better learning with phonetically natural patterns, replicating previous findings.
• Adults exhibited a strong session effect, performing worse in the second session, indicating potential interference or fatigue.

Conclusions:

• School-age children did not show the phonetic asymmetry observed in adults or significant learning.
• Adults' results suggest the artificial languages and procedures were adequate for testing phonetic learning.
• Adults retained knowledge of the artificial language sound patterns for over a month, exceeding typical laboratory findings for purely phonetic learning.