Sensory Development in Infants: Vision and Hearing, Slides of Developmental Psychology

Download Sensory Development in Infants: Vision and Hearing and more Slides Developmental Psychology in PDF only on Docsity! Central sulcus primary somatosensory cortex Parietal lobe Occipital lobe Cerebellum Spinal cord 1 Docsity.com Docsity.com 2 2/5/2009 3 Sensory Capabilities: Experiencing the World Seeing Visual acuity not fully developed but can see to some extent Attend to visual field highest in information and brightness Possess some sense of size constancy Distinguish and show preference for different colors 2/5/2009 4 newborn 4 weeks 8 weeks 3 mos 6 mos Docsity.com 5 2/5/2009 9 Visual Preference • Principles used? • Discrimination • Gaze duration • Habituation • Useful with babies days old visual stimuli baby experimenter 2/5/2009 10 Habituation/ Dishabituation - Habituation: baby’s response will decrease to “new” stimuli over time Can use variety of stimuli types and use baby’s ability to discriminate to infer learning/ perception - Dishabituation: recovery in responses infant can discriminate between “old” and “new” stimuli Docsity.com 6 2/5/2009 11 High Amplitude Sucking - Infant sucking brings about sound stimuli - When bored (habituated), they slow sucking - Experimenter changes sound, baby becomes interested again (dishabituates) and increases sucking speed 2/5/2009 12 Is speech special? The most important single phenomenon with respect to this question has been: Categorical perception (Perceiving speech sounds as being in a limited number of categories) iN uno AON OT 1 Percentage /da/ responses 20 40 60 Voice onset time (msec) 7 Docsity.com