Issue 14608: Add support for Scale of Measurement (smm-ftf) Source: CAST Software (Dr. Bill Curtis, b.curtis(at)castsoftware.com) Nature: Uncategorized Issue Severity: Summary: Summary: Scales of Measurement are a fundamental property of a measure describing the allowable mathematical transformations that can be legitimately applied to it. Discussion: Attached are some URLs that will give you an overview of Scales of Measurement. They are a fundamental property of a measure describing the allowable mathematical transformations that can be legitimately applied to it. Since they therefore determine the statistical methods that can be applied to the measure, they need to be treated as a first level attribute of a measure. http://www.math.sfu.ca/~cschwarz/Stat-301/Handouts/node5.html http://en.wikipedia.org/wiki/Scale_of_measurement (not always written in easily understood terms) http://www.wadsworth.com/psychology_d/templates/student_resources/workshops/stat_workshp/scale/scale_01.html (tutorial - behavioral science view) Summary of change: · Add enumeration MeasurementScale o Add enu ordinal, nominal, interval and ratio. · Add attribute scale:MeasurementScale to Measure class o This defines the scale of Measurement for measurements produced by the measure. Resolution: Revised Text: Actions taken: October 31, 2009: received issue Discussion: Attached are some URLs that will give you an overview of Scales of Measurement. They are a fundamental property of a measure describing the allowable mathematical transformations that can be legitimately applied to it. Since they therefore determine the statistical methods that can be applied to the measure, they need to be treated as a first level attribute of a measure. http://www.math.sfu.ca/~cschwarz/Stat-301/Handouts/node5.html http://en.wikipedia.org/wiki/Scale_of_measurement (not always written in easily understood terms) http://www.wadsworth.com/psychology_d/templates/student_resources/workshops/stat_workshp/scale/scale_01.html (tutorial - behavioral science view) Summary of change: • Add enumeration MeasurementScale o Add enum ordinal, nominal, interval and ratio. • Add attribute scale:MeasurementScale to Measure class o This defines the scale of Measurement for measurements produced by the measure. Discussion: From Larry Hines: With respect to 14608: First, scale is mostly redundant information. As such it could be an operation defined for Measure, but it should be an attribute. This operation would always return ‘ratio’ for RatioMeasures. It would always return ‘interval’ for DimensionalMeasures. The tricky part is to separate ‘nominal’ and ‘ordinal’ for Ranking measures. We could have an optional attribute for that. It wouldn’t hurt, but it is not needed to convey the meaning of a measurement. From Alain Picard: After reviewing Larry’s comment on his vote, I have to agree that it will be better to defer this issue to the RTF and to better implement a real solution to the issue. Disposition: Deferred End of Annotations:===== iler: QUALCOMM Windows Eudora Version 7.1.0.9 Date: Mon, 02 Nov 2009 12:00:06 -0500 To: issues@omg.org, smm-ftf@omg.org From: Juergen Boldt Subject: issue 14608 -- SMM FTF issue This is issue # 14608 OMG Issue No: 14608 Title: Add support for Scale of Measurement Source: Bill Curtis, CAST Summary: Scales of Measurement are a fundamental property of a measure describing the allowable mathematical transformations that can be legitimately applied to it. Discussion: Attached are some URLs that will give you an overview of Scales of Measurement. They are a fundamental property of a measure describing the allowable mathematical transformations that can be legitimately applied to it. Since they therefore determine the statistical methods that can be applied to the measure, they need to be treated as a first level attribute of a measure. http://www.math.sfu.ca/~cschwarz/Stat-301/Handouts/node5.html http://en.wikipedia.org/wiki/Scale_of_measurement (not always written in easily understood terms) http://www.wadsworth.com/psychology_d/templates/student_resources/workshops/stat_workshp/scale/scale_01.html (tutorial - behavioral science view) Summary of change: · Add enumeration MeasurementScale o Add enu ordinal, nominal, interval and ratio. · Add attribute scale:MeasurementScale to Measure class This defines the scale of Measurement for measurements produced by the measure. Juergen Boldt Director, Member Services Object Management Group 140 Kendrick St Building A Suite 300 Needham, MA 02494 USA tel: +1 781 444 0404 x 132 fax: +1 781 444 0320 email: juergen@omg.org www.omg.org