A “fair test” refers to an experiment that is carefully controlled to ensure that the information gathered is reliable. Fair tests are used in the fields of science, psychology and medicine, among other disciplines. To guarantee the validity of an experiment, a control group is utilized, biases are limited, interfering variables are controlled and an adequate sample size is used.Know More
A control group is used to give the results of the experimental group a standard to which to compare them. In an experiment to determine the effectiveness of a particular medication in relieving headaches, for example, the control group receives a placebo. To prevent biases, the participants are not told whether or not they are getting the actual medication. If participants in the control group know that they are taking a placebo, they might monitor their headaches less intently.
A large sample size of participants is required, because if there are too few people in the control and experimental groups, the statistical margin of error overwhelms the results of the test.
All participants in the experiment also agree to control variables that could lessen or increase headaches, like diet and exercise. This prevents those variables from interfering with the results.Learn more about Standardized Tests
The National Occupational Competency Testing Institute, more commonly known as NOCTI, develops and delivers standardized tests and assessments to students in career and technical programs in high school and college. The assessments are based on a job and task analysis process.Full Answer >
The GED test is designed to measure the equivalent knowledge that a stundent would accumulate through a standard four-year high school education. Its difficulty level is subjective, but the test is not designed to be tricky or overly challenging.Full Answer >
The Standardized Test for the Assessment of Reading, or STAR, are standardized tests that are taken by students using a computer. There are also STAR tests for math and early literacy as well as reading.Full Answer >
A Compass test measures a student's skills in various subject areas in order for colleges to place the student into appropriate courses. Upon completion of the test, feedback is immediate, and the student receives a list of courses to choose from.Full Answer >