... kept the other half with him. When they hatched he kept the ones who were separated from the mother with him and left the others with the goose mother. All the hatchlings were then put together in a box and allowed to mix, when they were removed from this box they separated to their respective guardians. Lorenze believed that the developments learned during the critical period were irreversible and long-lasting. The consequences are split up into short term and long term points. In the short term this bonding is necessary for food and safety and in the long term it produces a template for reproductive patterns. However there are problems with this concept. The idea of a critical period, has been critized as it is better described as a sensitive period. This is because learning can occur outside the time period. The assumption that imprinting is irreversible has been critzed ...

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