Category 1
What is Quasi Experimental
Research designs in which researchers have only partial control over their independent variables
Internal Validity
Most internal validity is in a True Experiment
Internal Analysis
break one or more groups into additional subgroups to test for subgroup differences that are consistent with the focal theory or with competing theories.
External Validity
Most external validity is in a Non-Experiment
Patching
To establish the size of a quasi-experimental effect
One-group design
All participants are in one group, the group that received the quasi-experiment treatment, and has no control group.
Control Continuum
Degree of researcher control over confounded variables.
Median split
Experimenters recruit people who score in either the top half or the bottom half on an individual difference measure of interest
Natural Experiments
Line between non-experimental designs and natural experiments can be unclear due to the arbitrary nature of "manipulations"
Patched-up design
Designs that occur when researchers continually add control groups to a quasi-experimental design