JLP315H1 Chapter Notes - Chapter 2: Effusion, Categorical Perception, Visual Acuity
Document Summary
Hasp (high-amplitude sucking paradigm) shows how often an infant sucks on a pacifier. After habitutation to a sound, an experimenter may change to a new sound. If the infant sucks harder, they perceived a difference between the sounds. Jlp315: lang acq: research has shown that infants can distinguish speech sounds outside their native language, categorical perception, adults perceive categorically b/c they"re poor at distinguishing sounds from the same phonetic category (ex. Infants perceive categorically too, but less so than adults. Infants lose this increased sensitivity by age 1: languages differ in the phonemes they use, tonality, and more. Infants" earliest babbling sounds the same across languages. By age 1, they make sounds that reflect their language. Cooing sounds like ooh and aah prompt adults to speak to infants, which then prompts them to develop their speech sounds. Infants vocalizations like babbling, cooing and crying are their prelinguistic communication system. The expression of communicative intent before speech (pg.
