Two methods of constructing equal-interval scales for educational achievement are discussed: Thurstone's absolute scaling method and Item Response Theory (IRT). Alternative criteria for choosing a ...

Background: Clinical trials are commonly done without blinded outcome assessors despite the risk of bias. We wanted to evaluate the effect of nonblinded outcome assessment on estimated effects in ...

Obesity represents a serious threat to health through its association with conditions such as type 2 diabetes mellitus, coronary heart disease and certain types of cancer. Knowledge regarding risk to ...

Technologies for the accurate measurement of time have been sought after and evolved in the long history of mankind. The unit, "time," is a basis for all physical phenomena. It has been used in every ...

When you buy a kilo of sugar or a litre of petrol, how do you know you are getting exactly the amount you paid for? The National Measurement Institute is on to it. "Measurement affects everything we ...