Lorenz

• What did Lorenz investigate?

  Imprinting
• What animal is Imprinting common in?

  Birds
• How did Lorenz investigate imprinting?

  He randomly divided goose eggs.

  • Half were hatched naturally with biological mothers.
  • Half hatched with Lorenz.

  In later studies, he varied the time between hatching and when the gosling first observed a moving object.
• What did Lorenz find?

  The goslings who Lorenz had imprinted on him.

  • Following him rather than the Mother Goose.
  • The goslings hatched in a natural environment, imprinted on the mother goose and followed her,

  Lorenz placed all the goslings in a box. when they were released, those that had imprinted on Lorenz found him and followed him.
• What was Lorenz finding on Critical Period?

  He found that goslings had a critical period of around 32 hours.

  • If a gosling did not see a large moving object to imprint on, they lose the ability to imprint.
• What does this research suggest?

  Imprinting is a strong evolutionary/biological feature of attachment in certain birds.

  Imprinting is with first large objects visually seen.