Cognitive Assessment, My Software & Spreadsheets, Psychometrics, Psychometrics from the Ground Up, Tutorial, Uncategorized, Video

Psychometrics from the Ground Up 9: Standard Scores and Why We Need Them

In this video tutorial, I explain why we have standard scores, why there are so many different kinds of standard scores, and how to convert between any two types of standard scores.

Here is my Excel spreadsheet that converts any type of standard score to any other type.

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Psychometrics from the Ground Up, Statistics, Tutorial, Uncategorized, Video

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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