KINE 3020 Lecture Notes - Lecture 14: Power Law

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KINE 3020 Nov 11th, 2015
Information Processing
Information
Information Processing Model
Stages of the Information Processing Model
Information Processing Model
Skilled Performance (Production & Outcome) & Skill Acquisition (Learning) Analysis
two questions arise …
o 1. What are the main factors controlling performance?
o 2. What are the differences between skilled performance & unskilled performance?
Information
Information Processing Model
Stages of the Information Processing Model
o 5 stages
Selective Attention
Perception
Decision
Effector
Feedback
///
Perception = stimulus "identification"
Decision = response "selection"
Effector = response "programming"
"Ask His help. And be humble because everything has done by Him."
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Information
Human beings Processors of Information
Amount of information [H] contained in a Signal is measured in Bits
o Bits
Unit of Measurement (i.e. Amount of Information in a Signal)
Binary Digit
log 2 N = bits
N = Number of Uncertainty
log 2 N = Bits; Number of Questions to reduce the Uncertainty in Half
o One Bit
or One Question
N = 2 (two uncertainty
One Bit is the amount of Information required to reduce Uncertainty by
Half
Example Diagram
N = 1
o 1 uncertainty … No question required (log 2 1 = Zero bit) … answer is obvious
N = 2 (two boxes)
o 2 Uncertainties One question required (log 2 2 = One bit)
1 question (i.e. one bit) reduces the uncertainty by half
2 Uncertainties … 1 Question / 1 Bit of information is good enough for
solving the problem
N = 4 (4 boxes, 1 marble)
o 4 Uncertainties … Two questions required (log 2 4 = Two bits)
o How many questions do you have to ask? maximum 2 questions
left half or right half; with remaining boxes … on the right? (or on the left?)
Question with 4 Uncertainties … 2 Questions / 2 Bits of information is good
enough for solving the problem
N = 8 (8 boxes)
o maximum 3 questions
Right half
o log 2 8 = log 2 23 = 3
Questions with 8 Uncertainties … 3 Questions / 3 Bits of information is good
enough for solving the problem
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N = 16 (16 boxes)
o maximum 4 questions
o log 2 16 = log 2 24 = 4
log 2 N = bits
greater number of bits
o more difficulty for processing
o How much information is being processed?
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