PSY319H5 Lecture Notes - Lecture 2: Visual Acuity, Psy, Habituation
9 Apr 2016
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Lecture 2 &3 testing infant perception and cognition. Try to control for infant state: test when awake, fed, no diaper change needed (by asking parents, bring babies in when they are typically awake quiet alert state. Counterbalance: strong order effects because restless or fidgety at end. Unlikely to have cohort effects: no history differences between 6-month-old infants and 18-month-old infants. Longitudinal findings are unlikely to be driven by historical/ cultural changes. Development during infancy: development of perceptual abilities. E. g. , infants" visual acuity, hearing: development of perceptual preferences. E. g. , what do babies like to listen to, look at, touch . Infants cannot tell us their perceptual experiences, so we must infer their perceptual abilities and preferences based on their behavior: three assumptions. Infants will attend/ orient to stimuli they prefer or find interesting. Infants prefer to hear/see stimuli that they have heard/ seen before. Habituated while the looking time drop by 50: behavioral responses.
