chapter 6 experimental design 1 Flashcards
(20 cards)
single factor designs
an experimental design with a single IV
independent group designs
a between subjects design that uses a manipulated IV and has at least 2 groups to which subjects are randomly assigned
matched group design
a between subjects design that uses a manipulated IV and has at least two groups of participants- subjects are matched on some variable assumed to affect the outcome before being randomly assigned to the groups
ex-post facto design
a between subjects design with at least two groups of participants that uses a subject variable or creates non-equivalent groups
repeated measures design
another name for a within subjects design- participants are tested within each of the experiments conditions
interobserver reliability
the degree of agreement between two or more observers of the same event
homogeneity of variance
one of the conditions that should be in effect in order to perform parametric inferential tests such as t tests or ANOVA- refers to the fact that variability among all the conditions of the study ought to be similar
independent sample t tests
an inferential statistical analysis used when comparing two samples of data in either an independent group design or a non-equivalents group design
dependent sample t tests
an inferential statistical analysis used when comparing two samples of data in either a matched group design or repeated measure design
single factor multi-level design
an experimental design with a single IV
non-linear effects
an outcome that does not form a straight line when graphed- can only occur when the IV has more than two levels
continuous variable
variable for which potentially infinite number of values exist
discrete variable
variable for which in each level represents a distinct category that is qualitatively different from another category
ANOVA
analysis of variance
ANOVA source table
a standardised method for displaying the results of an analysis of variance, including sources of variance. sum of squares, degree of freedom, mean of squares, F ratios and probability values
placebo
in research when subjects believe a treatment is in effect when it is in fact not
placebo control group
control group in which subjects believe they are receiving treatment when they are not
waitlist control group
control group in which participants are not recieveing treatment but eventually will
yoked control group
control group in which treatment given to a member of the control group is matched exactly with the treatment given to the member of the experimental group
