3020 - L10 Extreme Psychometrics

What was signal Detection Theory first used for?

Perception studies

What’s one example where SDT needs to be used?

recognition memory tasks

Sensitivity?

ability to discriminate

Response Bias

Criterion for saying yes

Conservative and Liberal response biases can have the same actual memory?

True

What software do you need to calculate SDT?

excel and SPSS

In a contingency table what does sensitivity mean?

% of people with disorder who test positive

In a contingency table what does specificity mean?

% of people without the disorder who test negative

What score does Item Response Theory use? 

Theta - level of theta represents ability of test taker

What relationship does classical test theory assume?

linear relationship

What relationship does Item Test Theory assume?

Item characteristic curves

What is the Guessing part of a curve?

Y axis intercept

What is the difficulty of the curve?

half way x axis of curve

What is the Discrimination (a) of a curve

Slope at steepest point