|
|
|
||||||||||||||||||||
|
|
|
||||||||||||||||||||
|
|
GROUP EXPERIMENTAL DESIGN Group experimental designs can be of different forms. If there is only one independent variable that can be manipulated, then a single-variable design is used. If there are two or more independent variables, and at least one can be manipulated, then a factorial design should be chosen. Single-variable design
This study is classified under three main headings depending on the degree of control maintained on other variables: ·
True experimental designs (high degree of control) ·
Quasi-experimental designs (medium degree of control) ·
Pre-experimental
designs (low degree of control) Factorial design This is applied to determine if the effect of an independent variable out of two or more variables can be generalized. A factorial design, in this sense, indicates relationships between variables. It may be that while one variable increases, the other one decreases, or an increase in one gives rise to the other variable. For lessons on variables, please go to UNIT 1, Section 1
|
||||||||||||||||||||
