FMLY 1010 Lecture 29: Lecture 29

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University of Manitoba
Family Social Sciences
FMLY 1010
Christine A.Schippers

lP98729 Early Visual Stimulation There are critical periods of time in early infancy when an infant needs a specific quality of visual stimulation to develop normal visual perception When early experience is lacking, visual capability doesnt develop normally many years later = Sleeper effect development of visual perception is apparent for sensitivity to mid high narrow striped images, face processing, and facial identity based on the spacing of internal facial features Depth Perception Depth perception = ability to judge the relative distance of objects We are able to judge depth using 3 different kinds of information Binocularcues involve both eyes, each receives a different visual image of an object oThe closer the object is, the more different the 2 views are o Information form the eye muscles tell you how far away the object is Pictorial informationmonocular cues requires input from only one eye Interposition when one object is partially in front of another, you know that the partially hidden object is farther away Linear perspective impression that railroad lines get closer together as they get farther away Kinetic cues come from either your own motion or the motion of some object Motion parallax if you move your head, objects near you seem to move more than objects farther away Kinetic information tends to be used first by newborns (3 months of age) Binocular cues used around 4 months, monocular cues used at 57 months Use visual cliff test for depth perception of infants solve using kinetic cues mostly 6 monthold babies have established depth perception Use test for younger infants to watch apparently looming objects have depth perception if they flinchblink as the object appears to come very close (observed in 3month olds) What Babies Look At First 2 months search for meaningful patterns (lightdark contrast signals the edge of an object) Motion also captures a babies attention at 2 months 23 months, cortex develops more fully, attention shifts from where an object is, to what the object is o Focus more on patterns than on edges Faces: An Example of Responding To A Complex Pattern Faces are not uniquely interesting to infants (compared to other complex pictures) However, when looking at faces specifically, babies prefer attractive faces, and they prefer their mothers face
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