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ELTC 303
ASSESMENT AND EVALUATION
Damla ATAY 200521004
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Educational and psychological measurement
techniques can help people make better decisions
by providing more and better information.
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Measurement in any field involves three common
steps

• identifying and defining the quality or the
  attribute that is to be measured

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2. Determining the set of operations by which the
attribute may be isolated and displayed for
observation
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3. Establishing a set of procedures or
definitions for translating our observations into
quantitative statements of degree or amount
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MEASURES OF CENTRAL TENDENCY
The Mode
The Median
The Arithmatic Mean
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THE MODE
The typical score identified by picking the one
that occurs most frequently. It corresponds to
the highest point in the frequency polygon.
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THE MEDIAN
The value on the score scale that separates the
top half of the group from the bottom half.
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THE ARITHMATIC MEAN
The sum of a series of scores divided by the
total number of scores.
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MEASURES OF VARIABILITY
The Range
The Standard Deviation
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THE RANGE
The difference between the highest and the lowest
scores.
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THE STANDARD DEVIATION
A measure of the dispersion of a collection of
numbers
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References Thorndike, Robert M. Measurement and
Evaluation in Psychology and Education.
Prentice-Hall, Inc New Jersey, 1991