Scoring systems and conversions (2)

In this talk, you will learn about different standard scoring systems used in psychometric testing, such as T scores, stens, and stanines, including how to calculate and convert between them. Dr Graham Tyler explains the practical benefits and drawbacks of each scoring method, the importance of the Z score as a basis for conversion, and considerations for providing feedback to candidates. By the end, you'll understand how to interpret and transform test scores accurately and appropriately for different audiences.

After this talk, you will:

• Understand what a T score is and how it can be added together across tests.

• Recognise the benefits and limitations of using T scores, stens, stanines, and grades.

• Be aware of how these different scoring systems are distributed across a population.

• Know how to calculate a Z score from a raw score using the mean and standard deviation.

• Be able to convert Z scores into T scores, stens, stanines, and IQ scores using the appropriate formulas.

• Understand how to reverse the process to go from a standard score back to a Z score.

• Appreciate the importance of choosing the most suitable way to give feedback to candidates, depending on their understanding of statistics.

• Realise that you may need to convert between different standard score systems when combining results from various tests.

• Know that the choice of standard score may depend on the test publisher or client requirements.

• Be aware that careful calculation and the use of correct norms are essential when converting scores.

• Be prepared for the next module, which will cover ethical issues in psychometric testing.