EBP Words Flashcards
standard error of measurement
estimate of expected error in an individual’s score, measure of response stability or reliability
tests of significance
estimation of true differences, not due to chance; a rejection of the null hypothesis
standard error
expected chance variation among the means
type 1 error
the null hypothesis is rejected when it is true; the means of scores are concluded to be truly different when the differences are due to chance
type 2 error
the null hypothese is accepted when it is false; the means of scores are concluded to be due to chance when they are truly different
t-test
used to compare two independent groups created by random assignment and identify a difference at a selected probability level
one-tailed t-test
based on directional hypothesis; evaluates difference in data on only one end of the distribution
two-tailed t-test
based on non-directional hypothesis; evaluates difference in data on both ends of the distribution (tests of significance almost always two-tailed)
ANOVA (analysis of variance)
used to compare three or more independent treatment groups or conditions at a selected probability level
multifactorial ANOVA
compares multiple groups on two or more independent variables
ANCOVA (analysis of covariance)
used to compare two or more treatment groups or conditions while also controlling for the effects of intervening variables (covariates)
Chi square test
non-parametric test of significance used to compare data in the form of frequency counts occurring in two or more mutually-exclusive categories
Pearson product-moment coefficient (r)
correlate continuous data with underlying normal distribution on interval or ratio scales
Spearman’s rank correlation coefficient (Spearman’s rho)
non-parametric test used to correlate ordinal data
point biserial correlation
one variable is nominal (dichotomous) and the other is ordinal
