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Experimental Research (Criteria for a Well-Designed Experiment (4.Adequate…

- - - - RG1 ----- X1 ----- O1 RG2 ----- X2 ----- O2 RG3 ----- X3 ----- O3 RG4 ----- ---- ----- O4
      - No pretest
    - - RG1 -- O1 -- X1 -- O2 RG2 -- O3 -- X2 -- O4 RG3 -- O5 -- X3 -- O6 RG4 -- O7 -- ---- -- O8
      - Consists of pretest and post test
    - - Combining Design A and B - includes 2 control group and 2 experimental group
      - RG1 -- O1 -- X1 -- O2 RG2 -- O3 -- X2 -- O4 RG3 -- O5 -- X3 -- O6 RG4 -- O7 -- ---- -- O8
    - - Intended for minimum 2 independent variables study
      - provide advantage of single design (economical)) rather than separate
      - allow researcher to investigate the interaction between variable
      - Minimum of 1st independent (2 variable) x 2nd independent ( 2 variable)
- - - - basic minimum of control, measurement, analysis, procedures needed (how the test conducted)
      - question of the experimental variables
    - - deal with the extent of generalisability of the results
      - must have a good internal validity