4.2. experiments

1. Welcome to
[ ]Dr. Myrza Rahmanita, SE, M.Sc
Experiment
http://www.jeffreysankey.com/.a/6a015437c9d78b970c01a51170cf41970c-pi
RESEARCH DESIGN

2. FIRST LET’S WE SEE ABOUT
The Learning Objectives

3.  Uses for experimentation.
 Advantages and disadvantages of the
experimental method.
 Seven steps of a well-planned experiment.
 Internal and external validity with
experimental research designs.
 Three types of experimental designs and
the variations of each.
http://cdn2.cloudpro.co.uk/sites/cloudprod7/files/pointing.jpg

4. EVALUATION
of Experiments

5. 9-5
Advantages
• Ability to manipulate IV
• Use of control group
• Control of extraneous
variables
• Replication possible
• Field experiments possible
Disadvantages
• Artificiality of labs
• Non-representative sample
• Expense
• Focus on present and
immediate future
• Ethical limitations
As Shown in the table below …

6. EXPERIMENTATION
in the Research Process

7. 9-7
As Shown in the diagram below …

8. CONDUCTING
an Experiment

9. 9-9
Specify treatment levels
Control environment
Choose experimental design
Select and assign participants
Pilot-test, revise, and test
Collect data
Analyze data
Specify treatment variables
As Shown in the diagram below …

10. EXPERIMENT:
Placement of Benefits Module

11. 9-11
As Shown in the explanation below …

12. SELECTING AND ASSIGNING
Participant

13. RANDOM
ASSIGNMENT
https://buildingquote.com.au/wp-content/uploads/2014/12/choosing-doors.jpg

14. MATCHING
http://www.risk.net/IMG/412/285412/na9-non-matching.jpg

15. QUOTA MATRIX
Example

16. 9-16
As Shown in the explanation below …

17. VALIDITY
In Experimentation

18. THERE ARE TWO
ASPECT OF VALIDITY
INTERNAL&EXTERNAL
http://evolllution.com/wp-content/uploads/2015/01/sized_Smooth-Sailing-Towards-Data-Driven-Decision-Making-in-Seven-Steps-copy1.jpeg

19. THREATS
to Internal Validity

20. 9-20
Threats
Maturation History
Testing
Instrumentation
Selection
Statistical
regression
Experimental
mortality
As Shown in the diagram below …

21. ADDITIONAL THREATS
to Internal Validity

22. 9-22
Diffusion of treatment
Compensatory equalization
Compensatory rivalry
Resentful disadvantaged
Local history
As Shown in the diagram below …

23. THREATS
to External Validity

24. 9-24
Reactivity of
testing on X
Interaction of
selection and X
Other
reactive factors
As Shown in the explanation below …

25. EXPERIMENTAL
Research Design

26. 9-26
Pre-experiments
True experiments
Field experiments
As Shown in the diagram below …

27. JOB ENRICHMENT
Quasi-Experiment

28. 9-28
As Shown in the explanation below …

29. EXPERIMENT
The Right Size of Flavor
LAST …
http://www.zastavki.com/pictures/1680x1050/2011/Food_Pizza_Delicious_pizza_029580_.jpg