This document discusses experimentation in research. It covers key topics such as variables in experiments, advantages and disadvantages of experiments, the experimentation process, ways to assign subjects, threats to internal and external validity, experimental designs including preexperimental, true experimental, and field experiments. Specific experimental designs mentioned include randomized block design, Latin square, and factorial design.
Experimental design is inferential procedure or scientific method in Statistics wherein cause and effect relationship is studied by planning an experiment. In Experimental Design methodology, proper experiments are planned in order to achieve desired objective. Copy the link given below and paste it in new browser window to get more information on Experimental Design:- www.transtutors.com/homework-help/statistics/experimental-design.aspx
In this ppt the viewer will able to know about Types of Experimental Design. During the research design what kind of experimental design is applicable? Why experimental design needed in experimental research. Experimental research is research conducted with a scientific approach using two sets of variables. The first set acts as a constant, which you use to measure the differences of the second set. (Example: Temperature & Time in reactor)
Portion explained:
1. Definition of Experimental research
2. Situations to conduct Experimental Research
3. Types of experimental research design
4. Pre-experimental research design
5. True experimental research design
6. Quasi-experimental research design
7. Advantages of experimental research
Experimental design is inferential procedure or scientific method in Statistics wherein cause and effect relationship is studied by planning an experiment. In Experimental Design methodology, proper experiments are planned in order to achieve desired objective. Copy the link given below and paste it in new browser window to get more information on Experimental Design:- www.transtutors.com/homework-help/statistics/experimental-design.aspx
In this ppt the viewer will able to know about Types of Experimental Design. During the research design what kind of experimental design is applicable? Why experimental design needed in experimental research. Experimental research is research conducted with a scientific approach using two sets of variables. The first set acts as a constant, which you use to measure the differences of the second set. (Example: Temperature & Time in reactor)
Portion explained:
1. Definition of Experimental research
2. Situations to conduct Experimental Research
3. Types of experimental research design
4. Pre-experimental research design
5. True experimental research design
6. Quasi-experimental research design
7. Advantages of experimental research
This presentation is for educational purpose only. I do not own the rights to written material or pictures or illustrations used.
This is being uploaded for students who are in search of, or trying to understand how a quasi-experimental research design should look like.
User Experiments in Human-Computer InteractionDr. Arindam Dey
This lecture covers the basics of user experiment design in human-computer interaction. Computer scientists and developers often create interfaces for a particular purpose. This lecture explains how a user experiment can be designed and conducted to systematically compare one interface with the other.
This presentation is for educational purpose only. I do not own the rights to written material or pictures or illustrations used.
This is being uploaded for students who are in search of, or trying to understand how a quasi-experimental research design should look like.
User Experiments in Human-Computer InteractionDr. Arindam Dey
This lecture covers the basics of user experiment design in human-computer interaction. Computer scientists and developers often create interfaces for a particular purpose. This lecture explains how a user experiment can be designed and conducted to systematically compare one interface with the other.
5. Advantages of an Experiment?
• Researcher’s ability to manipulate the
independent variable
• Contamination from extraneous
variables can be controlled more
efficiently
• Convenience
• Cost
• Replication
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6. Disadvantages of Experiments
• Artificiality of the laboratory
• Generalization from nonprobability
samples
• Larger budgets needed
• Restricted to problems of the present or
immediate future
• Ethical limits to manipulation of people
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7. Experimentation Process
• Select relevant variables
• Specify the treatment levels
• Control the experimental environment
• Choose the experimental design
• Select and assign the participants
• Pilot-test, revise, and test
• Analyze the data
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8. Ways to Assign Subjects
• Random Assignment
• Matching Assignment
– Quota matrix
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9. Does a Measure Accomplish
What it Claims?
• Internal validity
• External validity
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11. Threats to External Validity
• The Reactivity of Testing on X
• Interaction of Selection and X
• Other Biasing Effects on X
– Artificial setting of testing
– Respondents knowledge of testing
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13. Design Symbols
X the introduction of an experimental
stimulus to the participant
0 a measure or observation activity
R an indication that sample units have
been randomly assigned
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14. Preexperimental Designs
• One-shot case study
• One-group pretest-posttest design
• Static group comparison
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15. True Experimental Designs
• Pretest-posttest control group design
• Posttest-only control group design
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17. Field Experiments:
Quasi- or Semi-Experiments
• Non Equivalent Control Group Design
• Separate Sample Pretest-Posttest
Design
• Group Time Series Design
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