Day 3

Question 1

Measurement error

Answer 1

Due to method or characteristics of the person being measured. Observed scores=true scores(scores controlling for error)+measurment error conceptual formula for reliability.

Question 2

What are linear relationships

Answer 2

Linear relationships are measured using the Pearson correlation coefficient (r).

Question 3

Signs and correlation coefficients?

Answer 3

The sign of the correlation coefficient (+ or-) gives the direction of the relationship :positive or negative, the numerical value of the correlation coefficient gives the magnitude or degree of relationship varies from -1.00 to 1.00

Question 4

Describe reliability

Answer 4

Reliability is the stability and consistency of a measure.

Question 5

What is validity?

Answer 5

Validity is the extent to which a measure truly measure what it intended to measure.

Question 6

What is discriminative validity?

Answer 6

If results are in consistent with what you are measuring. Sidenote:it is possible;e to have a reliable test that not valid.