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  • Lorenz (1935)
    • background
      • Lorenz found that infants who stayed close to their mothers were more likely to survive and did research to look into this
      • He came up with this idea of imprinting and because it's linked to survival, he said it was due to natural selection
    • procedure
      • Split goose eggs into 2 groups: Group 1 - left with natural mother Group 2 - put in an incubator
      • The first thing the geese saw was either their mother (GI) or Lorenz (G2)
      • After they hatched, they were marked and mixed up again so Lorenz could see who they followed
      • Lorenz also varied the time between hatching and seeing a moving object
    • findings
      • The group that hatched with their mother imprinted on their mother and followed her around
      • The group that hatched with Lorenz followed him
      • however, if they did not see something moving around within the first 2 days they would not be able to imprint at all - the critical period
    • evaluation
      • Strength: support for the concept of imprting
      • Limitation: gemeralising from birds to humans
      • strength: application to human behaviour
    • long lasting effects
      • Imprinting is irreversible and long lasting
      • One goose who imprinted on Lorenz used to sleep on his bed every night
      • Could also affect who tried to mate with later in life
      • Geese who had imprinted on their mother displayed mating rituals to other goose
      • Geese who had imprinted on Lorenz dipslayed mating rituals to him


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