1. KINDS OF EXPERIMENT
Laboratory experiments (controlled, artificial conditions):
Pretest-post-test control and experimental group
Two control groups and one experimental group pretest-post-test
Post-test control and experimental group
Post-test two experimental groups
Pretest-post-test two treatment
Matched pairs;
Factorial design;
Parametric design;
Repeated measures design;
Field experiments (controlled conditions in the ‘real world’):
one-group pretest-post-test;
non-equivalent control group design;
time series
Natural experiments (no control over real world conditions)