Lorenz Flashcards

1
Q

ad of Lorenz

A
  • other studies support the idea that animals are born w/ an instinct to attach to the first moving object they see
  • psych demonstrated that chickens exposed to yellow rubber gloves during feeding in their first few weeks of life, imprinted on the gloves
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2
Q

disad of Lorenz

A
  • imprinting is more reversible than Lorenz thoguht
  • same psych found that he could reverse the imprinting in chicken that had initially tried to mate w/ the yellow rubber gloves
  • after spending time w/ their own species, they were able to engage in normal sexual behaviour w/ other chickens
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3
Q

long-term effects of imprinting

A
  • found that process of imprinting is irreversible + long lasting
  • discovered that this early imprinting had an effect on later mate preferences = sexual imprinting
  • animals will choose to mate w/ the same kind of object upon which they were imprinted
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4
Q

procedure - Lorenz imprinting

A
  • Lorenz was an ethologist + wanted to investigate imprinting
    = the instinct in several species of animals to attach to the first moving thing they see after they are born
  • Lorenz took a clutch of gosling eggs
  • divided them into two groups
  • one group left to hatch w/ their natural mother present
  • other eggs placed in an incubator
  • when eggs in incubator hatched, first moving thing they say was Lorenz
  • Lorenz, marked the two groups to distinguish between them
  • placed them all together again
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5
Q

findings - Lorenz imprinting

A
  • Goslings quickly divided themselves up
  • one group following their natural mother
  • incubator eggs following Lorenz = had no recognition of their natural mother
  • found that process of imprinting is restricted to the critical period = 2 days
  • if its not exposed to a moving object during this critical period = won’t imprint
  • Lorenz had to teach goslings how to swim
  • they would always return to him when they called
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