1
Q
Covariance
A
When 2 va have a relationship/ covary/ vary together (+, -, curvilinear)
2
Q
Temporal precedence
A
When one va comes first before other va is measured/ changes
3
Q
Internal Validity
A
No alternative explanation for relationship between 2 va, no confusion about what caused the outcome; does not include other possible variables that can impact while a relationship is still present between two va
4
Q
Random sampling
A
- drawing a sample using some random method
- ensures members have an equal chance of being in the sample
- external validity
5
Q
Random assignment
A
- using of a random method to assign participants into different groups
- ensures groups have the same kinds of ppl in them
- internal validity
6
Q
Systematic
A
- levels of a variable coincide with experimental group membership
- potential confound
- internal validity threat
7
Q
Unsystematic
A
- when the levels of a variable fluctuate independently of group membership
- more variability w/in groups
- obscure differences
- less likely to confirm hypothesis as it can be harder to identify differences
8
Q
Manipulation check
A
- ensures you are actually manipulating what you want to manipulate
- supports construct validity of the IV
- conducted w/in the same study that demonstrates a link between IV and DV
- Same participants
9
Q
Pilot study
A
- supports construct validity of the IV
- conducted before or after the study that demonstrates a link between the IV and DV
- Different participants
