ExperimentalResearchStrategy-U-System.pptVIP

Questions: Will the test be curved if the scores are very low? Which type of probability sampling mathod is most commonly used? Is the validity of a research study related to the validity of the measures in the research study? If there are some threats to your study and you are unable to completely control them can your results still be taken as valid? Would your research study become weak if your predictions of confounding variables were off? Or could that fall under error? If extraneous and confounding variables exist, how do you account for them in the experiment to keep from affecting the results? More questions: Why is the research strategy the 5th step in the process? It seems like it should be one of the first things one should choose! For our research project, I am confused about Step 8, evaluating the data, and step 9, reporting the results. What exactly do you want us to include in these steps? Is this related to what type of research strategy we use? When you say to include a reference at the end of our presentation do you mean the different studies we looked at? Do you want us to cite the source(s) in APA style or just put the name of the source? Experimental Research Strategy Chapter 7 Dusana Rybarova Psyc 290B May 23 2006 Outline: Cause-and-effect relationships Elements of an experiment Dealing with extraneous variables Control groups Manipulation checks Increasing external validity: Simulation and Field studies 1. Cause-and-effect relationships the term experiment is often used as a generic label for any kind of scientific research however, a research study must meet specific criteria to qualify as an experiment the goal of experimental strategy is to establish the existence of a cause-effect relationship between two variables in an experiment we are trying to show that changes in one variable are directly responsible for causing changes in the other variable Causation and the third-variable problem the variables that we want to manipulate and stu