Differences in talker recognition by preschoolers and adults

Area of Science:

• Developmental Psychology
• Speech Perception
• Linguistics

Background:

• Talker variability in speech is crucial for language processing across development.
• Limited understanding exists regarding developmental changes in processing talker information.
• Two hypotheses exist: children are more sensitive to talker variation or possess less developed recognition systems.

Purpose of the Study:

• To investigate developmental changes in talker recognition.
• To compare talker recognition abilities in preschoolers and adults.
• To test the protracted tuning hypothesis of recognition systems.

Main Methods:

• Preschoolers and adults (N=180) were presented with voices linked to distinct cartoon characters.
• Participants identified which character was speaking after voice exposure.
• Experiments manipulated acoustic similarity (age, gender, dialect, prosody).

Main Results:

• Children were significantly less accurate than adults when talkers were matched on age, gender, and dialect.
• Children's accuracy improved when voices differed significantly in gender or age.
• Greater acoustic dissimilarity facilitated children's talker encoding.

Conclusions:

• Findings support the protracted tuning hypothesis for talker recognition development.
• Children's speech sound processing is influenced by their developing talker recognition abilities.
• Acoustic dissimilarity aids talker encoding in children, suggesting developmental tuning of perceptual space.