Transcript MHS 6220 Psychoeducational Testing I

PSY 6645
Evaluation and Assessment of the
Individual:
Week 2 Discussion
Assessment Procedures for Counselors and Helping Professionals, 7e
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Central Tendency
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Use the following numbers:
 1,3,2,5,4
Describe the following statistics:
 Mean
 Median
 Mode
Draw a frequency distribution graph.
Are these scores normally distributed?
Assessment Procedures for Counselors and Helping
Professionals, 7e
Drummond/Jones
15-2
© 2010 Pearson Education, Inc.
All rights reserved.
Illustration of a Normal Curve
Assessment Procedures for Counselors and Helping
Professionals, 7e
Drummond/Jones
15-3
© 2010 Pearson Education, Inc.
All rights reserved.
Using the Normal Curve
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Scenario: You administer a test that is
normally distributed with a mean of 100
and a standard deviation of 15.
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Can a score of 90 be described as “average?”
Can a score of135 be described as average?”
What percentage of the population have a score
of 130 or above?
What percentage of the population has a score
below 130?
Assessment Procedures for Counselors and Helping
Professionals, 7e
Drummond/Jones
15-4
© 2010 Pearson Education, Inc.
All rights reserved.
Using the Normal Curve

Scenario: You administer a test that is
normally distributed with a mean of 100
and a standard deviation of 15.
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What
What
What
What
What
What
percentile rank is a score of 85?
percentile rank is a score of 115?
is a z-score of a score of 85?
is a z-score of a score of 115?
is a T-score of a score of 70?
is a T-score of a score of 130?
Assessment Procedures for Counselors and Helping
Professionals, 7e
Drummond/Jones
15-5
© 2010 Pearson Education, Inc.
All rights reserved.
Putting it to Use
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Psychometric Summary to Interpret
Use this ranking for interpretation:
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130 and above
120-129
110-119
90-109
80-89
70-79
69 and Below
Assessment Procedures for Counselors and Helping
Professionals, 7e
Drummond/Jones
Upper Extreme
Superior
Above Average
Average
Below Average
Low
Lower Extreme
15-6
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Measuring Up
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Using the MMY provided to each group,
go through and choose one test that
you would find useful for your field of
study.
Discuss that test with your group.
Assessment Procedures for Counselors and Helping
Professionals, 7e
Drummond/Jones
15-7
© 2010 Pearson Education, Inc.
All rights reserved.