A range of motion measurement with a goniometer is typically which data scale?

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Multiple Choice

A range of motion measurement with a goniometer is typically which data scale?

Measuring range of motion with a goniometer yields data on a ratio scale. The measurements are taken in degrees from a defined neutral position, giving equal intervals between values and a true zero that represents no movement from that neutral starting point. This combination means you can meaningfully compare magnitudes and form ratios (for example, one joint having 90 degrees of ROM is twice another joint with 45 degrees). Nominal data would be simple categories, ordinal would only rank order without consistent spacing, and interval data has equal spacing but lacks a true zero; ROM from a neutral position supplies a meaningful zero, plus the equal spacings, making ratio the appropriate scale.

Measuring range of motion with a goniometer yields data on a ratio scale. The measurements are taken in degrees from a defined neutral position, giving equal intervals between values and a true zero that represents no movement from that neutral starting point. This combination means you can meaningfully compare magnitudes and form ratios (for example, one joint having 90 degrees of ROM is twice another joint with 45 degrees). Nominal data would be simple categories, ordinal would only rank order without consistent spacing, and interval data has equal spacing but lacks a true zero; ROM from a neutral position supplies a meaningful zero, plus the equal spacings, making ratio the appropriate scale.

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