Lorenz

Question 1

ad of Lorenz

Answer 1

• 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

Question 2

disad of Lorenz

Answer 2

• 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

Question 3

long-term effects of imprinting

Answer 3

• 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

Question 4

procedure - Lorenz imprinting

Answer 4

• 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

Question 5

findings - Lorenz imprinting

Answer 5

• 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