312 quick practice

Unbiased sample achieved with

Randomization, sampling frame, response rate

Within subjects is a true test with?

Counter-balancing

Between subjects is a true test with?

randomized assignment

Which form of validity is associated with the gold standard

concurrent

All validity forms?

Construct, face, content, criterion, convergent, divergent

Criterion varible

this is the DV - variable we want to predict

Predictor varible

this is the IV - variableused to make prediction

random error occurs because

observer error; environment; participants; equipment; testing external validity

Control participant variables with

random assignment or within subjects

Random error occurs from?

observer error, environment, participant, equipment, testing validity

Single factor two/multi Nominal scale DV

Compare proportions using Chi-square

single factor two level

interval/ratio comparison with t-test

single factor multilevel

interval/ratio ANOVA and post hoc

valid must be __ ; reliable does not mean __

Reliable; valid

systematic random sampling

one individual chosen then intervals

simple random sampling

everyone has equal probability

third problem variable

Z could be function of a spurious relationship

partial correlation used for?

third potential measures X & Y and potential Z

cross lagged

measures at 1 time, 2 time, 4 measurements correlated

spearman rank order

linear and ordinal variables

point biserial

linear variables where one is interval/ratio, one is dichotomous

pearson coefficient

linear and variables are ratio/interval