Scales

Measurement Scales

Measurement scales refer to the types of information provided by numbers. Each scale (i.e., nominal, ordinal, interval, and ratio) provides a different type of information. Knowing which scale applies in a particular situation is necessary to accurately interpret numbers assigned to people, objects, or events. Ignorance of scales’ distinguishing characteristics can lead to improper treatment

Bayley Scales of Infant Development

The Bayley Scales of Infant Development (BSID-II), published by Psychological Corporation, are a set of scales that takes 45 minutes to administer and assess mental, physical, emotional, and social development. Because the scales provide an overall picture of the child’s developmental status, they are often used to evaluate whether children are developing normally or may

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