Psychometrics Flashcard - Statistics Refereshment 3

Front

What is a dichotomous item in psychological testing?

Back

An item requiring a yes or no response

Front

In a dichotomy test, what value is assigned to a 'no' response?

Back

0

Front

What does the variance of a dichotomous item depend on?

Back

The proportion of positive and negative responses

Front

What is the maximum variance for a dichotomous item?

Back

0.25

Front

What is a raw score in psychological testing?

Back

A score based on the total number of correct responses

Front

How is a z-score calculated?

Back

By comparing an individual's score to the mean and standard deviation

Front

What does a z-score of 1.5 indicate?

Back

The score is above average

Front

What is the purpose of converting raw scores to standardized scores?

Back

To make scores easier to interpret

Front

What does a percentile rank indicate?

Back

The percentage of scores below a certain score

Front

How is a percentile rank calculated?

Back

By counting the number of scores below a specific score