designstudiopax.blogg.se - Reliability and validity class activity

The extent to which the results can be reproduced when the research is repeated under the same conditions. It’s important to consider reliability and validity when you are creating your research design, planning your methods, and writing up your results, especially in quantitative research. Reliability is about the consistency of a measure, and validity is about the accuracy of a measure.

They indicate how well a method, technique, or test measures something. Reliability and validity are concepts used to evaluate the quality of research. Start referencing Reliability vs Validity in Research | Differences, Types & Examples Generate accurate Harvard, APA, and MLA references for free with Scribbr's Referencing Generator.

Probability vs non-probability sampling.

In order to be valid, a test must be reliable. If he produced this pattern, his shooting would be reliable and valid. Suppose Tim's shots produced a pattern like this:Īssuming Tim is trying to hit the target, this pattern would be both reliable and valid. Tim's shooting is consistent/reliable, but not where he is aiming. His shots are in a reliable pattern elsewhere. Tim is aiming at the bull's eye but misses. Tim is aiming at the bull's eye but shoots elsewhere, thus his shooting is not valid. Please select an answer Yes, Tim puts his bullets in the same area of the target making his shooting reliable, but he is aiming at the bulls eye. Your answer has been saved.Īt target practice, Tim shoots 15 bullets at the bull's eye.

Even though the cuff may not be the appropriate one and thus the test not valid, it is reliable. The measurement is reliable because you get similar readings each time. You repeat your measurement three times and get similar readings. You take the blood pressure of a 64 year old man with a cuff designed for a child.

This is not a valid measure of the effect of exercise on pulse rate. Which of the following would be a valid measure of pulse rate in this study?Ĭounting the number of jumping jacks for one minute.Ĭounting the number of heart beats in one minute.Ĭounting the number of jumping jacks done by each group.Ĭounting the number of exercises done by each person.Ĭounting the number of heartbeats is a valid measure. They divide into four groups one group does jumping jacks for one minute, a second jumps for two minutes, a third for three, and a fourth does not jump. They test this by doing different numbers of jumping jacks and then measuring their pulse rates. Students want to study the effect of exercise on pulse rate.