Term
| independent groups design |
|
Definition
participants are assigned to condition of independent variable, remain here for rest of exp.
similar char. are averaged 'balanced' between the two groups to make groups comparable |
|
|
Term
| How is control gained in an experiment? |
|
Definition
| manipulation, holding variables constant, balancing |
|
|
Term
|
Definition
| researcher 'manipulates' what each condition of the indep. variable will see, this enables the researcher to make valid comparisons of results |
|
|
Term
|
Definition
making sure individual differences are controlled for by making comparable groups
i.e random assignment |
|
|
Term
|
Definition
form of random sampling
5 conditions: A, B, C, D, E
randomize them- CAEBD, and assign participants to each condition, randomize sequence and repeat
|
|
|
Term
| benefits of block randomizing |
|
Definition
1. creates comparable groups
2. controls for time-related changes, events may occur as expt. is being conducted |
|
|
Term
testing intact groups
(Group 1 will be in this condition, Group 2 in this, and so forth) |
|
Definition
| threat to internal validity, intact group randomly assigned to cond. of expt., intact groups formed before the experiment (assigining student of one intro class to one cond, and all the students of another class to a seperate cond), individual differences not accounted for and confounding |
|
|
Term
|
Definition
| extraneous variables- not of direct interest, but still must be controlled, could confound experiment |
|
|
