In order to find out research sometimes you need to use experimental research. In experimental research the participants are put into two group without them knowing which one they are in. They are either put into the control group and the experimental group. There are two different ways that an experiment can be preformed one is blind and the other is double blind. Blind is when the participants don't know who is in the experimental or control group but the people conducting the test do. Double blind is when both the participants and the people conducting the test don't know who is in the control and who is in the experimental group. Double blind experiment is better because it avoids bias.
Another way to conduct experimental research is by using quasi-experiment research which the subjects to be observed are not randomly assigned to different groups but actually grouped together for their similar traits. One type of quasi - experiment is a panel study where people are put into groups and are studied over a long period of time by using a survey or diaries that they keep.
There are nine threats to experimental research. they are:
-History: pretest and posttest-over time
-Maturation: subtle aging effects.
-Testing effects: changes in posttest because of experimental treatment
-Instrumentation: differing in questions and researcher administer
-Statistical regression: extremes in the beginning, no higher measurement
-Selection: randomizing
-Experimental mortality: participants dropping out of study
-Interaction effects: anticipate interactions
No comments:
Post a Comment