CASE STUDY - Palmer (1975)

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  • Created by: Medivxl
  • Created on: 31-03-16 10:48

palmer study

Aim: to find out if what we expect to see influences what we see

Whether context would affect perception

  • lab experiment
  • showed participants visual scenes such as a kitchen
  • then shown an object either: mail box, drum or loaf of bread.
  • were then asked to identify object

four confitions were used: independant variables:

  • appropriate
  • inappropriate-similar
  • inappropriate-different
  • no context

was a repeated measures design as every partipant participated in all parts of experiment.

DEPENDANT VARIABLE = the number of correctly identified items.

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results

the participantts identified most objects after seeing an appropriate context.

participants identified the least objects after seeing inappropriate context.

so Palmer concluded that expectations affect perception.

People have a perceptual set based on context which affects how accurately they recognise objects.

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strengths and weaknesses

strengths

  • contolled how long participants saw the object
  • were given clear instructions so they knew what to do
  • data from two participants not counted as they forgot glasses (could of affected results)

weaknesses

  • being told what they were doing may of made them try harder in some conditions.
  • try to please experimenter
  • fewer results as some data couldnt be used
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