week 6 Flashcards
1
Q
between subjects design
A
- participants receive one condition or the other but not both
2
Q
within subject design
A
- participants receive both conditions (sometimes through repeated measure designs)
3
Q
how to create equivalent groups
A
- random assignment
4
Q
blocked random assignment
A
- guarantees an equal number of subjects per group
- ensures each condition of the study has a participant randomly assigned to it before it is repeated
5
Q
matching (for random assignment)
A
- participants are grouped together on a subject variable
- used when groups are small and there is a chance that all of one subject group could be placed in the same study group
6
Q
what conditions must be present for matching
A
- must have good reason to believe that matching variable will have a predictable effect on the outcome of the study
- must be a reasonable way of measuring ppl on the matching variable
7
Q
order effect
A
- in a within subject study, once a participant does the first part of the study, the experience can influence performance on later parts of the study
8
Q
types of order effects
A
- progressive effect (progress changes steadily from trial to trial)
- carry over effect (state related, bad performance carries over)
9
Q
controlling order effects
A
- counter balancing (use more than one sequence, tested once per condition)
- complete counter balancing (tested once per condition with every possible sequence used once)
- partial counterbalancing (take random sample of orders from complete set of orders/randomize order of conditions for each subject)
10
Q
how is total number of sequences calculated
A
- X!
- x=numer of conditions
- != possible orders that can be used
11
Q
latin square
A
- assures that: a) every condition occurs equally often in every position and b) every condition can come before smth and after smth once
12
Q
reverse counter balancing
A
- experimenter presents conditions in one order then presents them in a reverse order
13
Q
Block randomization
A
- every condition must occur once before any condition can be repeated
14
Q
cross sectional study
A
- between subjects
- uses different groups and compares
15
Q
longitudinal study
A
- within subjects
- same group studied overtime
