Cognitive Psychology PSYC231

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Cognitive PsychologyPSYC231

• Introduction
• Dr. Jan Lauwereyns, EA619, ext. 5042

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Introduction

• First set of eight lectures
• Goldstein, chapters 1-4
• Introduction
• Cognition and the brain
• Perception
• Attention

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Cognitive psychology historical background

• Something between stimulus and response hidden,
  covert
• Donders reaction time experiments

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Cognitive psychology historical background

• Something between stimulus and response hidden,
  covert
• Donders reaction time experiments
• Thinking takes time
• Separable components perceptual discrimination,
  motor selection, etc.

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Figure 1.3 (p. 6)A modern version of Donders
(1868) reaction time experiment. (a) the simple
reaction-time task and (b) the choice
reaction-time task. For the simple time reaction
text, the participant pushes the J key when the
light goes on. For the choice reaction time test
the participant pushes the J key if the left
light goes on, and the K key if the right light
goes on. The purpose of the Donders experiment
was to determine the time it took to decide which
key to press for the choice reaction time test.
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Figure 1.4 (p. 7)Sequence of events between
presentation of the stimulus and the behavioral
response, in Donders experiment. The dashed
line indicates that Donders measured reaction
time, the time between presentation of the light
and the participants response. (a) simple
reaction-time task (b) choice reaction-time task.
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Cognitive psychology historical background

• Helmholtz and psychophysics
• Wundt and analytic introspection
• Countered by behaviourism

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Rat navigation guided by remote
control The Far Side?
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Rat navigation guided by remote
control The Far Side?
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Talwar et al., Nature, 2002
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Revival Information processing,with the
computer as a model

• Input
• Input processor
• Memory unit
• Arithmetic unit
• Control
• Output

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Modern approaches

• Converging operations
• Studying behavioural and neurophysiological
  correlates
• of mental events
• The Davachi et al (2003) experiment

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Davachi et al. ProNAS 2003

• let me tell you a little secret PubMed

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Correlates
Behaviour
Neurophysiological