![]() ![]() To continue with the example of measuring the piece of wood, a tape measure that has been created with accurate spacing for inches, feet, etc. Validity refers to the extent we are measuring what we hope to measure (and what we think we are measuring). The tape measure yields reliable results. Measure it repeatedly and you consistently get a measurement of 2 1/2 feet. Measure - you get a measurement of 2 1/2 feet. Say you have a piece of wood that is 2 1/2 feet long. Think about measurement processes in other contexts - in construction or woodworking, a tape measure is a highly reliable measuring instrument. Reliability is concerned with questions of stability and consistency - does the same measurement tool yield stable and consistent results when repeated over time. ![]() These two concepts are validity and reliability. Whether the same measurement process yields the same results. ![]()
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