So, there is high reliability but low validity. The principles of validity and reliability are fundamental cornerstones of the scientific method. The experiment has been repeated with the same results. The measurement will be the same, allowing for a small margin of change for positioning of the tape measure). Then ask them what will happen if they repeat the measurement (and get them to do this). The second measure of quality in a quantita-tive study is. For example, a survey designed to explore depression but which actually measures anxiety would not be consid-ered valid. From this you can introduce the term validity – you are not measuring intelligence, you are measuring head size. through measurement of the validity and reliability.1 Validity Validity is dened as the extent to which a concept is accurately measured in a quantitative study. Clearly this is not the case and discussions will ensue. Once they have made a note of this tell them that this is a measure of intelligence – the larger the head, the more intelligence. Instruct students to work in pairs and to measure the circumference of each other’s head. In addition, for clinical practice and research, it is essential to establish the utility of a measurement instrument. Validity is whether you are measuringĪ good example of how to illustrate this in a lesson is using fabric tape measures (perhaps the ones you can find in that well-known Swedish furniture ReliabilityĬan be thought of as repeatability – the extent to which, if you repeated the research, you would get the same results. Perhaps it did, but what is more likely is that it lacked one of these. That is, try to avoid, “the study lacked reliability and validity”. Many students get a little muddled initially by these two concepts and so it may be helpful, at first, to suggest that they avoid using them in the same The reliability and stability analyses show that the instrument meets the validity criteria quite well, and the ASD seems to be appropriate for measuring SD attitudes in university students in Italy.

Research Methods Validity and Reliability

Study validity and reliability