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Vivisection (from Latin vivus, meaning alive, and sectio, meaning cutting) is surgery conducted for experimental purposes on a living organism, typically animals with a central nervous system, to view living internal structure.
the view that perceptual abilities are learned. Preference technique. A method of studying infants' perceptual skills devised by Robert Fantz; the baby is shown two pictures or objects, and the researcher keeps track of how long the baby looks at each one.