Perception

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Perception

• Pattern recognition
• A process of identifying a stimulus
• Brain will attempt at a solution even with
  incomplete or ambiguous information
• Some perception is hard-wired (e.g. colour, basic
  shapes, illusions, cliff edges)
• Some perception is learned (e.g. cross-cultural
  differences)

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WE PAY THE THE HIGH FEES
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do not raed ervey lteter by it slef but the wrod
as a wlohe.
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Reaction Time

• Reaction time (RT)
• Afferent signals from sensory receptor to brain
• 2. Brain processes
• 3. Efferent signals from the brain to muscles

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The Subtractive Method

• Isolate a mental operation measured by RT
• Compare RT of simple task to RT of complex task
• the difference in time is assumed to reflect the
  mental operation required to perform the more
  complex task
• Donders compared RTs from different tasks varying
  in complexity

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Simple RT
250 msec
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Discriminatory RT
NOPE
YEP
450 msecs
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Choice RT
RIGHT
GREEN
RED
LEFT
650 msecs
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Eye movements

• Measuring eye movements give us some insight into
  attentional processes and decision making

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