Phonetic Approach
Focuses on single sounds and correcting defective sound production.
Emphasizes motoric manipulation or articulator placement.
Used when a child cannot produce a sound at all.
Phonemic Approach
Focuses on phonological rules and teaching sound contrasts.
Used when a child can make the sound but uses it incorrectly.
Contrastive Therapy
Teaching phonemic contrasts (e.g., "tea" vs. "key") to show meaning differences.
Segmentation
Speech is a continuous flow of overlapping sounds, making it hard to distinguish word boundaries.
How do infants learn segmentation?
Motherese (infant-directed speech)
High pitch
Slowing down
How does slowing down help in learning another language?
It makes segmentation easier by creating clearer word boundaries.
Perceptual Constancy
The same sound can be produced differently depending on the speaker.
Factors affecting perceptual constancy
Age, sex, vocal characteristics.
Coarticulation, speech rate, prosody, and allophonic variation.
How do infants learn phonemes despite variations?
They generalize across different pronunciations to recognize phonemes.
Limitation in Phonological Development
A child's phonological system narrows over time.
Example: Instead of "All fricatives → stops," they refine to "Only interdental fricatives → stops."
Ordering in Phonological Development
Random substitutions become more systematic.
Example: "All lingua-alveolar fricatives → stops (with correct voicing)."
Suppression in Phonological Development
Over time, children naturally stop using certain phonological processes.
Example: A child who deletes final consonants eventually starts including them.