PPT-Control problems in experimental research

Week E Todays questions Last week we understood what experiments are not A robust experiment allows strong conclusions to be made How do we design robust experiments We control for variables which can upset or compromise our conclusions. Rosemarie Nagel . Universitat Pompeu Fabra. , . ICREA, BGSE . April 2012 . Course content. (in red: replication of experiment). Week 1. Introduction . guessing game. Week 2. Bargaining/public goods . Chapter 11. The general plan for carrying out a study where the independent variable is changed. Determines the internal validity. Should provide for limited differences between control and experimental groups. Part II: Cross-sectional and Quasi-Experimental Designs. Frankfort-. Nachmias. & . Nachmias. (Chapter 6 – Cross-Sectional and Quasi-Experimental Designs). Gerring. (Chapter 8). Campbell and Stanley, “Experimental and Quasi-Experimental Designs for Research.” (remainder). Analysis of Biological Data. Ryan McEwan and Julia Chapman. Department of Biology. University of Dayton. ryan.mcewan@udayton.edu. Experimental design is like a game a chess, . you must . think. first, before you move…. Magnetohydrodynamic . (MHD) Effect . with respect . to . Intracardiac . ECG . Signals. W. B. . Buchenberg. 1. , . G. . Hoppe. 1. , . R. . Lorenz. 1. , . W. . Mader. 2. , . P. . Laudy. 3. , . C. . . Bienek. Chinese for Tomorrow. : Student Perceptions and Language Gain. . Dr. Jeff R. Watson. Dr. Wayne He (. 何文潮. ). Design of. Chinese for Tomorrow Series . 《. 走向未来. 》. 系列的设计. Tyler Bassett and Tomomi Suwa. 12.07.2011. Designing A Scientific Study. Thoughts on Experimental Design. Two types of studies. 1) Observational . . 2) Experimental. Observational Study. -Observe subjects and measure variables of interest . Variation between plots treated alike is . always. present. Modern experimental design should:. provide a measure of experimental error variance. reduce experimental error as much as possible. Natural sources of error in field experiments. A very common way of research design. A good design to establish cause and effect relationships among variables. It is the type of research that. directly attempts to influence a particular variable. (Mr. Staeger as a young scientist). Key Concepts and Vocabulary. Key Concepts:. How do we learn new things in science?. What are the steps of the scientific method?. What are the variables in an experiment?. Chapter 9. Experimental Design Research Methods. Experimental Design Research Methods. Experimental design research methods . are one . of the ‘purest’ forms of social science inquiry. . Results . Making Predictions with Experimental Probability Warm Up Probabilities can be used to make predictions in daily life. A prediction is something that can reasonably be expected to happen in the future. Dr. Chris L. S. . Coryn. Kristin . A. Hobson. Fall 2013. Agenda. Course overview. Introductions. Course pretest examination. Discussion . and questions. Course Material. Website. http. ://www.wmich.edu/evalphd/courses/eval-6970-experimental-and-quasi-experimental-designs-for-applied-research-and-evaluation. M. Betz. (CERN, Geneva). M. . Gasior. (CERN, Geneva). F. . Caspers. (CERN, Geneva). M. . Thumm. (KIT, Karlsruhe). Gentner. day. 10/2011, CERN, Geneva. Outline. Introduction to .