Can infants learn phonology in the lab? A meta-analytic answer

Area of Science:

• Developmental Psychology
• Linguistics
• Cognitive Science

Background:

• Infants must learn native language sounds and phonotactics.
• Seminal studies in 2002-2003 proposed mechanisms for infant sound and phonotactic learning.
• These studies inspired significant follow-up research.

Purpose of the Study:

• To meta-analytically assess the empirical evidence for infant phonological learning in laboratory settings.
• To investigate the replicability of key findings on infant sound and phonotactic acquisition.
• To provide implications for scientific literature and future research methodologies.

Main Methods:

• Meta-analysis of extant empirical evidence.
• Inclusion of close and less close methodological replications of seminal studies.
• Appraisal of laboratory-based infant phonological learning experiments.

Main Results:

• Neither seminal finding regarding sound learning nor phonotactic learning was replicated under close methodological scrutiny.
• Less methodologically rigorous replications provided some support for infant sound learning.
• The overall replicability of the initial findings is questionable.

Conclusions:

• The foundational claims about infant sound and phonotactic learning require further investigation due to limited replicability.
• Future infant laboratory research should utilize paradigms with clearer links between experimental stimuli and behavioral outcomes.
• Exploration of additional mechanisms for phonological acquisition is warranted.