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Experimental Research

Experimental Research. Keith Carrington Valerie Nash Keith Nerby Kathleen Olewinski Tanya Wojciechowicz. ED 740, November 2010. Experimental Research. Purpose : to test cause-and-effect relationships between variables. Experimental Research Groups.

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Experimental Research

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  1. Experimental Research Keith Carrington Valerie Nash Keith Nerby Kathleen Olewinski Tanya Wojciechowicz ED 740, November 2010

  2. Experimental Research Purpose: to test cause-and-effect relationships between variables

  3. Experimental Research Groups Leedy, P. D., & Ormrod, J. E. (2010). Practical research. Upper Saddle, NJ: Pearson Education.

  4. Group 1 diet pill Group 2 placebo Experimental Group: receives the treatment or is experimented on Control Group: receives NO treatment; NOT experimented on

  5. Group 1 Sustained Silent Reading (SSR) Group 2 Reading strategy Experimental Group: receives the treatment or is experimented on Control Group: receives NO treatment; NOT experimented on

  6. Types of Variables Leedy, P. D., & Ormrod, J. E. (2010). Practical research. Upper Saddle, NJ: Pearson Education.

  7. Group 1 diet pill Group 2 placebo Independent variable: the item the researcher changed between the groups (often it is the treatment) Dependent variable: variable thought to be influenced by the independent variable (is measured or observed) Confounding variable: ways the groups might be different in addition to the independent variable

  8. Group 2 Reading strategy Group 1 SSR Independent variable: the item the researcher changed between the groups (often it is the treatment) Dependent variable: variable thought to be influenced by the independent variable (is measured or observed) Confounding variable: ways the groups might be different in addition to the independent variable

  9. Controlling Confounding Variables

  10. Leedy, Table 10.1 (pp. 243-245) Leedy, P. D., & Ormrod, J. E. (2010). Practical research. Upper Saddle, NJ: Pearson Education.

  11. Types of Experimental Design 1. Pre-Experimental Design: “forming a tentative hypothesis that should be followed up with more controlled studies” (p. 229)2. True Experimental Design:administering different treatments to a single group3. Quasi-Experimental Design: considers the variables that researchers are unable to control and cannot rule out as alternative explanations for results Leedy, P. D., & Ormrod, J. E. (2010). Practical research. Upper Saddle, NJ: Pearson Education.

  12. Ex-Post-Facto Design “after the fact” Purpose:to determine if causality exists How:the researcher “studies the possible effect of an environmental factor that has occurred prior to the study itself” (p. 228) Leedy, P. D., & Ormrod, J. E. (2010). Practical research. Upper Saddle, NJ: Pearson Education.

  13. Meta-Analysis Combines the results of several studies

  14. Experimental Research Issues • Ethics and Integrity • Responsible Conduct • Informed Consent (e.g., Harmon, 2010) http://www.nytimes.com/2010/04/25/weekinreview/25harmon.html?_r=1 • Human Subjects/ Research Participants • Conflict of Interest • Research Abuses • IRB Approval* • Publication/Peer Review • Collaborative Research Cardinal Stritch University. (2010). Institutional review board. Retrieved from http://www.stritch.edu/irb.aspx

  15. Experimental Research Collaborations

  16. Heart Monitor Experiment • Research Question:Do squat jumps change instantaneous heart rate? • Establish and record your resting heart rate using the monitor. • If you are in the BLUE group, please remain seated without moving as much as possible. If you are in the ORANGE group, please do as many squat jumps as fast as possible in the time given. • Establish and record your heart • rate using the monitor.

  17. Heart Monitor Data

  18. Please identify the following from the heart rate monitor activity. • Experimental Group - receives the treatment or is experimented on • Control Group - receives NO treatment; NOT experimented on • Independent variable - the item the researcher changed between the groups (often it is the treatment) • Dependent variable - variable thought to be influenced by the independent variable (is measured or observed) • Confounding variable - ways the groups might be different in addition to the independent variable

  19. References • Cardinal Stritch University. (2010). Institutional review board. Retrieved from http://www.stritch.edu/irb.aspx • Harmon, A. (2010, April 24). Where’d you go with my DNA? The New York Times. Retrieved from http://www.nytimes.com/ • 2010/04/25/weekinreview/25harmon.html?_r=1 • Leedy, P. D., & Ormrod, J. E. (2010). Practical research: Planning and design (9th ed.). Upper Saddle River, NJ: Pearson Education.

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