STA630 GDB Solution

True Experimental Designs

1- Pre-test- Post test control g roup design
2- Post-test-Only control g roup design
3- Solomon 4- G roup design.
True Experimental Design
1. Pre-test, post-test control g roup design is a true experimental design which involves at least 2 randomly formed g roups; g roups are pre-tested, one ***** receives a new or unusual treatment, and both g roups are post-tested.
2. Post-tested only control g roup design is a true experimental design involving at least 2 randomly formed g roups; one g roup receives a new, or unusual, treatment and both g roups are post-tested.
Solomon 4-g roup design is a true experimental design that involves random assignments of subjects to 1 or 4 g roups; 2 g roups are pre-tested, 2 are not; one of the pre-tested g roups and one experimental treatment and all 4 g roups are post-tested.
Quasi-Experimental Designs
1) Non-equivalent control g roup design
2) Time serves design
3) Counter-balanced design
Quasi-Experimental Design
1. Non equivalent control g roup design is a quassi-experimental design involving at lest 2 g roups, both of which are pre-tested; one g roup receives the experimental treatment, and both g roups are post tested.
2. Time series design is a quasi-experimental design involving 1 g roup which is repeatedly pre-tested, exposed to an experimental treatment and repeatedly post tested.
3. Counter-balanced design is a quasi-experimental design in which all g roups receive all treatments, each g roup receives the treatments in a different order, the number of g roups equals the number of treatments, and all g roups are post tested after each treatment.