IB SEHS Topic 6.2 Study Design Verified Answers

IB SEHS Topic 6.2 Study Design Verified Answers Specificity ️Measuring the skills needed for a particular sport can see how well the athlete can maintain that skill when repeatedly doing it. Accuracy ️Checking if the instruments you're using in an experiment are working properly & calibrated Reliability ️if you repeated the test again are you likely to get similar results Validity ️Does the test actually test what it is suppose to. Control group ️a bunch of people are put into a group that doesn't get any special treatment for the experiment. Why is it important to have an control group? ️To see if your hypothesis correlates with the data collected and overcoming learning problems Randomized groups ️People of various skill levels are put in different groups by random. This is to ensure that we don't favor one group over another. Blind experiment ️Participants in the experiment don't know which group they are in. If the participants know what they are getting, it will defeat the purpose of the experiment Double blind experiment ️both the participants and the experimenters are unaware of who is in the experimental or control groups. This is to make sure that neither party influences the results. Placebo ️A harmless substance given to the participants in the controlled group. The substance won't affect the person's performance during the experiment. PAR-Q ️a questionnaire that makes sure the participant doesn't have any health issues that will put them in danger in the experiment Field testing ️tests that can be done without expensive equipment. Laboratory testing ️experiments that are done in a lab. More accurate than field testing Maximal ️testing for a person's maximum ability. Used for people who are physically fit Sub-maximal ️For people who are afraid or aren't knowledgeable of pushing their limits. Good for children and the elderly confounding variable ️extraneous factor that interferes with the action of the independent variable on the dependent variable. independent variable ️The experimental factor that is manipulated; the variable whose effect is being studied. dependent variable ️The measurable effect, outcome, or response in which the research is interested. controlled variable (constant) ️a variable in an investigation or experiment that is held constant