Your SlideShare is downloading. ×
Business Research Methods Chap014
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×
Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Text the download link to your phone
Standard text messaging rates apply

Business Research Methods Chap014

915

Published on

0 Comments
1 Like
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total Views
915
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
32
Comments
0
Likes
1
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
No notes for slide

Transcript

  • 1. 14-1
  • 2. Part Three SOURCES AND COLLECTION OF DATA 14-2McGraw-Hill/Irwin © 2003 The McGraw-Hill Companies, Inc.,All Rights Reserved.
  • 3. Chapter Fourteen EXPERIMENTATION14-3
  • 4. Variables in Experiments • Independent variables • Dependent variables14-4
  • 5. Advantages of an Experiment? • Researcher’s ability to manipulate the independent variable • Contamination from extraneous variables can be controlled more efficiently • Convenience • Cost • Replication14-5
  • 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 people14-6
  • 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 data14-7
  • 8. Ways to Assign Subjects • Random Assignment • Matching Assignment – Quota matrix14-8
  • 9. Does a Measure Accomplish What it Claims? • Internal validity • External validity14-9
  • 10. Threats to Internal Validity • History • Selection • Maturation • Statistical • Testing Regression • Instrumentation • Experimental Mortality14-10
  • 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 testing14-11
  • 12. Experimental Designs • Preexperimental designs • True experimental designs • Field experiments14-12
  • 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 assigned14-13
  • 14. Preexperimental Designs • One-shot case study • One-group pretest-posttest design • Static group comparison14-14
  • 15. True Experimental Designs • Pretest-posttest control group design • Posttest-only control group design14-15
  • 16. Operational Extensions of True Designs • Completely randomized designs • Randomized block design • Latin square • Factorial design • Covariance analysis14-16
  • 17. Field Experiments: Quasi- or Semi-Experiments • Non Equivalent Control Group Design • Separate Sample Pretest-Posttest Design • Group Time Series Design14-17

×