Methods after first Midterm: 6 basic designs Flashcards
What type of design can add statistical power and why? (within, between, or mixed)
within
- doesn’t need as many subjects - probability of making type II error goes down when stat power is high
three main types of factorial designs?
- within
- between
- combos (mixed or nested)
basics of factorial designs (requirements)?
2+ independent variables with 2+ levels each
what type of statistical test do factorial designs require?
ANOVAs
Two types of between subjects designs
Type 1: completely randomized
Type 2: matched group
Statisitcal tests of between subjects designs and within subjects designs?
between: independent t-test
within: paired t-test
another name for within subjects deisgn
repeated measures design or randomized blocks design
Statistical tests for mixed designs?
SPANOVA
Three main types of within subjects design
- same subject all conditinos
- same subject before after (pre-test, post-test)
- subjects matched on subject variable and randomly assigned to treatments
disadvantages of within subjects designs
practice effects
differential carry over effects
violation of stat assupmtion
advantages of within subjects designs
each subject has own control
may increase stat sensitivity or stat power
Type of design where the levels of factor A under levels of factor B are not the same
Nested designs
design that requires the most subjects
between subject
designt hat requires the least number of subjects
within subjects
deisgn that lowers statistical power and increases liklihood of type II power
between subjects
