Experimental lab research - Experimental designs

9 important questions on Experimental lab research - Experimental designs

What is the goal, notation and the remark of a one-shot case study?

  • Cause-effect
  • X O
  • No comparison possible

What is the goal, notation and the remark of a one-Group Pretest-Posttest?

  • Investigate influence of a variable
  • O X O
  • No control for extraneous variables

What is the goal, notation and the remark of a Static group?

  • Comparing a treatment with a control group
  • EG: X O1
         CG:    O2
  • EG and CG can differ
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What is the goal, notation and the remark of a Pretest Posttest control group?

  • Control for confounds
  • EG: R O1 X O2
         CG: R O3   O4
  • The old workhorse of traditional experimentation

What is the goal, notation and the remark of a Posttest-only control group?

  • When pre-tests are not possible
  • EG: R X O1
         CG: R    O2
  • Simplet than PPCG mortality effects possible

What is the goal, notation and the remark of a Solomon Four-group?

  • Minimize effects of pre-testing
  • EG1: R O1 X O2
  • CG1: R O3    O4
  • EG2: R      X O5
  • CG2: R         O6
  • Strongest form of experimental control, takes into account re-test

What are the sub designs of statistical design?

  • Randomized blocks
  • Latin square
  • Factorial

What is the goal, notation and the remark of a time series?

  • When one group is available, and little control over manipulation and participants
  • O1 O2 O3 X O4 O5
  • Sensitive for history effects and re-test effects

What is the goal, notation and the remark of a multiple time series?

  • Time series with control group
  • EG: O1 O2 O3 X O4 O5
  • CG: O6 O7 O8   O9 O10
  • Different test possible

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