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The It is large often bird said flew that
hurriedly the past best the way to rusting begin
van your down day by is the with a stagnant
psychology green lab river
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Identify all the figures you saw (red and green)
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Early Beginnings

• Over 150 years ago, von Helmholtz conducted one
  of the first demonstrations of the ability to pay
  attention to stimuli out of the corner of your
  eyes

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Early Beginnings

• von Helmholtz found that he could perceive
  letters in certain regions of the display if he
  focused his attention at that location before the
  letters appeared

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Psychological Refractory Period

• PRP response inhibition to a second stimulus
  when presented to quickly after first stimulus

Stimulus Onset Asynchrony (SOA)
300 ms
300 ms
500 ms
300 ms
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Divided Attention

• The previous models have described attention as a
  bottleneck or spotlight
• Kahnemans single resource model

Task A 50 units
Resource pool
100 units
50 units left
20 units left
OVER THE LIMIT
Task B 30 units
Task C 70 units
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Divided Attention

• Wickens multi-resource model
• Separate resource pools for each
• modality visual, audition, tactile, olfactory,
  taste
• code spatial vs. verbal
• response motor vs. verbal

Visual pool
Audition pool
Tactile pool
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OUTPUT
Response Vocal vs. Motor
Modality Vision audition
Encoding Spatial vs. Verbal
INPUT
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Receiver Operating Characteristics (ROC)

• ROC shows trade-off when performing 2 tasks
  concurrently

Performance on TASK A
Performance on TASK B