3 (2) ASSESSMENTS: Standardisation

Question 1

What gives standardised tests objectivity?

Answer 1

Psychometric properties
🔸been tested for these
🔸reliable and valid
🔸most are responsive to change

Norm- referenced
🔸scores made from rep sample
🔸 compare ind score to pop

Standardised
🔸reflects same ability across context

Question 2

What are standardised assessments?

Answer 2

Standardised assessment are first run over a sample of the population.

They constitute the reference, the norm that is used to assess an individual’s performance.

-1SD is clinical (85 below scaled score).

Question 3

What are scaled scores?

Answer 3

A lot of tests you scaled scores, these on raw scores scale so that they are normally distributed.

🔸 allows scores from diff ass to be compared

Question 4

What’s standard deviation?

Answer 4

It’s a common measure for the spread of the distribution; it can tell us how far an individual scored away from the mean.

Question 5

Describe the process of standardisation

Answer 5

1️⃣ produce norms of a skill by using individuals of the same age Etc

2️⃣ Measure the mean

3️⃣ Measure the SD

4️⃣ using the norms, we can standardise an individual scores and transform them into meaningful and can comparable figures.

Question 6

What are Z scores?

Answer 6

The Z score is the number of standard deviations the score is from the mean.

Question 7

How do we calculate the z-score?

🔸what are percentiles?

Answer 7

(Ind score ➖ mean of ref pop)
➗ Norm’s SD

🔸 Z scores map directly onto percentages of the sample population.