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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 ...

Smart scales are all beginning to get quite similar. They’ll measure your weight, some body composition numbers, and then beam it all up to your online account. But Withings wants to take smart scales ...

Over five years after the release of the Body Cardio (and one flirtation with Nokia later), French company Withings has released its far most technologically advanced connected scale yet, the Body ...

A behind-the-scenes blog about research methods at Pew Research Center. For our latest findings, visit pewresearch.org. Pew Research Center has a long history measuring the public’s knowledge about ...

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 ...