supplies birthday party
Adult Party Themes Supplies Birthday Party
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Adult Party Themes Supplies Birthday Party supplies birthday party
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Adult Party Themes Supplies Birthday Party supplies birthday party Information
In 1960, Eleanor Gibson and Richard Walk conducted an experiment to see
whether depth perception is an inborn or a learned skill in humans. They
conducted their experiment with a table that had a thick glass surface on half
of the table and a solid base on the other half. This created an illusion of a
small cliff without the dangers of actually falling. In this experiment, infants
ranging from the age of 6 to 14 months were placed on the solid side of the
table. The infants' mothers were placed on the other side of table and were
there to coax the infants to the other side. Of the 30 infants tested, 27 of
them crossed the glass surface when called while only 3 refused.
Gibson and
Walk conducted the same experiment on newborn chickens and goats with
astonishing results. When chickens and goats were placed on the solid side, not
a single one of them made an error to cross the "cliff." The same test was
conducted on baby rats whose results fared far worse than the results of the
chickens and goats. The rats fared worse because they are nocturnal animals who
rely on other senses other than vision to direct them. From this experiment,
Gibson and Walk concluded that depth perception was inborn to all animals and
humans by the time they achieve independent movement. This is in the case of
chickens and goats at birth and for humans at around 6 months of age.
The
results of Gibson and Walk's experiment are very questionable because their
control group did not consist of any socially dependant animals. Infants are
socially dependent of their mother for survival and nurturing throughout their
childhood. Gibson and Walk should have conducted their control experiment on
socially dependant animals such as elephants or cheetahs instead of animals that
do not rely heavily on their caretaker. In 1985, Sorce, Emde, Campos, and
Klinnert conducted the same visual cliff experiment with human infants and their
mothers. This time, the mother was instructed to maintain an expression of fear
or happiness on the other side of the "cliff." When the mother expressed a happy
face, the babies checked the cliff and crossed. When the mother showed an
expression of fear, the babies were very reluctant to cross. When the cliff was
covered, the babies crossed the table without looking up at their mothers. This
study not only proves that facial recognition is an inborn quality of humans but
it shows that infants learn depth perception from trial and error through their
inborn reliance on their caretaker.
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