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Why Study Infants. Three reasons for studying infancy Philosophical questions The opportunity for humans to study themselves Parental investment Applied concerns The study of preterm infants Infants of drug-using mothers. The Study of Infants. Past, present, and future
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Why Study Infants • Three reasons for studying infancy • Philosophical questions • The opportunity for humans to study themselves • Parental investment • Applied concerns • The study of preterm infants • Infants of drug-using mothers
The Study of Infants • Past, present, and future • The philosophical debate – Nature versus Nurture • The empiricist argument • Knowledge comes through the senses • John Locke and the tabula rasa • William James and the infant’s world as a “booming, buzzing confusion”
The Study of Infants • Past, present, and future • The nativist argument • Humans are endowed at birth with ideas or “categories of knowledge” • Immanuel Kant and Rene Descartes
The Study of Infants • Past, present, and future • The main effects model • Nativist View • Nurturist View Constitution Constitution
The Study of Infants • Past, present, and future • The interactional model Constitution
The Study of Infants • Past, present, and future • The transactional model Constitution C1 C2 C3 C4 . . . . . . . Cn Environment E1 E2 E3 E4 . . . . . . . En
Methods of Research in Infancy • Getting and keeping subjects • How do you find subjects • Sources of recruitment • Representativeness and sampling • Subject attrition • Why don’t researchers discuss sampling issues? • Infant state • The infant as a difficult experimental subject
Methods of Research in Infancy • Response measures • Visual fixation measures • Sucking measures • Physiological measures • Age comparisons
Experimental techniques • Spontaneous visual preference • The procedure • Limitations • Habituation techniques • Conditioning techniques • Physiological measures • Heart rate • Brain activation measures
Aspects of perception • Visual acuity
Aspects of perception • Pattern preferences • Facial configurations • Complexity and symmetry