Stats-Validity Flashcards
Nominal
Categories with no numeric scales
Ordinal
Rank ordering, numerical values limited
Interval
Numerical properties are literal,assume equal interval between values
Independent variable
The manipulated variable (cause)
Dependent variable
The variable to be measured (effect)
Confounding variable
An “extra” variable that you didn’t account for that could be operating
Null hypothesis
The population means are equal; there is no observable difference, the IV had no effect
Research hypothesis
The population means are, in fact, not equal; the IV did not have an effect
Type I error
when we reject the null hypothesis that is actually true
Type II error
when we accept the null hypothesis that is actually false
Alpha level error
level of significance (.001, .01, .05), probability of making type I error
Test-retest reliability
measure of reliability obtained by administering the same test twice over a period of time to a group of people
Alternate forms reliability
requires administering two different forms of the same test to the same people at two points in time
Internal consistency
the consistency of people’s responses across the items on a multiple-item measure
Split-half reliability
the correlation of the total score on one half of the test with the total score on the other half