# TableMaker for Psychological Evaluation Reports

I am proud to announce the release of my new computer program, TableMaker for Psychological Evaluation Reports. It is designed to help providers of psychological assessments organize and present test data in a simple, efficient, and theoretically informed manner. You enter an evaluee’s test scores in an order that is convenient to you and theoretically organized tables are generated in MS Word like so:

TableMaker is free. For now, unfortunately, it runs on Windows only.

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# Do Large Subtest Score Differences Invalidate Composite Scores?

A video tutorial that explores the issue of when large differences in subtest scores within a composite tell us to ignore the composite score (Short answer: Not very often).

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# Within-Composite Differences: Why Measures of the Same Ability Differ

A video tutorial on some reasons for within-composite ability score differences.

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# Two Kinds of Hierarchies in Cognitive Ability Models

An exploration of different meanings of the “broad vs. narrow” distinction in hierarchical models of cognitive ability.

Below are pictures of examples of the two kinds of hierarchies.

Differing Levels of Generality

Differing Levels of Abstraction

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# Psychometrics from the Ground Up: 6. The Normal Distribution and the Central Limit Theorem

A video tutorial about why many variables have a normal distribution:

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# Psychometrics from the Ground Up: 5. Expected Value and Variance

A video tutorial about Expected Value and its relationship with variance:

## Topics Covered:

• Some Rules of Expected Value Computations
• Measuring Variability Using Expected Values
• The Relationship between the Normal Distribution and the Chi Square Distribution
• Raw Moments
• Central Moments
• The 2nd Central Moment (i.e., Variance) in Terms of Raw Moments
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# Psychometrics from the Ground Up: 4. Expected Value (What Does the Mean Mean?)

A video tutorial about a different of thinking about the meaning of the mean:

In this video, we take a simple question and we make it complicated so that we can make some complicated questions simple.

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