Can there be a metrology Can there be a metrology for psychometricians? for psychometricians? Luca Mari Luca Mari Università Cattaneo – LIUC, Italy Università Cattaneo – LIUC, Italy BEAR Seminar, University of California, Berkeley BEAR Seminar, University of California, Berkeley Tuesday, January 31, 2017 Tuesday, January 31, 2017
Abstract Abstract Metrology -- the “science of measurement and its application” according to Metrology -- the “science of measurement and its application” according to the International Vocabulary of Metrology International Vocabulary of Metrology (VIM) -- is a body of knowledge (VIM) -- is a body of knowledge the traditionally bound to the measurement of physical quantities, sometimes traditionally bound to the measurement of physical quantities, sometimes with the further specification that only high quality (in some sense to be with the further specification that only high quality (in some sense to be agreed) measurement-related activities constitute actual metrology, as agreed) measurement-related activities constitute actual metrology, as those performed in the US by the NIST. those performed in the US by the NIST. Given the social reputation of measurement, it is not amazing that there is a Given the social reputation of measurement, it is not amazing that there is a tension to continue the historical process of expanding such a still strict tension to continue the historical process of expanding such a still strict scope, where in particular under scrutiny is the necessity that the object of scope, where in particular under scrutiny is the necessity that the object of measurement is a physical quantity. measurement is a physical quantity. Arguing about metrology is then a good opportunity to discuss of the very Arguing about metrology is then a good opportunity to discuss of the very nature of measurement and its limits, between science, technology, nature of measurement and its limits, between science, technology, mathematics, and society. mathematics, and society.
My profile My profile Luca Mari (MS in physics, University of Milano, Italy, 1987; Ph.D. in Luca Mari (MS in physics, University of Milano, Italy, 1987; Ph.D. in measurement science, Polytechnic of Torino, Italy, 1994) since 2006 measurement science, Polytechnic of Torino, Italy, 1994) since 2006 has been a full professor of measurement science with Università has been a full professor of measurement science with Università Cattaneo - LIUC, Castellanza, Italy, where he teaches courses on Cattaneo - LIUC, Castellanza, Italy, where he teaches courses on measurement science, statistical data analysis, and system theory. measurement science, statistical data analysis, and system theory. He is currently the chairman of the TC1 (Terminology) and the secretary He is currently the chairman of the TC1 (Terminology) and the secretary of the TC25 (Quantities and units) of the International Electrotechnical of the TC25 (Quantities and units) of the International Electrotechnical Commission (IEC), and an IEC expert in the WG2 (VIM) of the Joint Commission (IEC), and an IEC expert in the WG2 (VIM) of the Joint Committee for Guides in Metrology (JCGM). He has been the chairman Committee for Guides in Metrology (JCGM). He has been the chairman of the TC7 (Measurement Science) of the International Measurement of the TC7 (Measurement Science) of the International Measurement Confederation (IMEKO). Confederation (IMEKO).
Some of my recent publications Some of my recent publications LM, P.Blattner, F.Pavese, Improving the understandability of the next edition of the International System Improving the understandability of the next edition of the International System LM, P.Blattner, F.Pavese, of Units (SI) by focusing on its conceptual structure , of Units (SI) by focusing on its conceptual structure , Measurement Measurement , 2017 , 2017 LM, A.Maul, D.Torres Irribarra, M.Wilson, Quantities, quantification, and the necessary and sufficient LM, A.Maul, D.Torres Irribarra, M.Wilson, Quantities, quantification, and the necessary and sufficient conditions for measurement , conditions for measurement , Measurement Measurement , 2017 , 2017 D.Petri, LM, P.Carbone, D.Petri, LM, P.Carbone, A structured methodology for measurement development A structured methodology for measurement development , , IEEE Trans. Instr. IEEE Trans. Instr. Meas. , 2015 , 2015 Meas. A.Mencattini, LM, A conceptual framework for concept definition in measurement: the case of A conceptual framework for concept definition in measurement: the case of A.Mencattini, LM, 'sensitivity' , , Measurement Measurement , 2015 , 2015 'sensitivity' LM, Evolution of 30 years of the International Vocabulary of Metrology (VIM) Evolution of 30 years of the International Vocabulary of Metrology (VIM) , , Metrologia Metrologia , 2015 , 2015 LM, LM, D.Petri, Measurement science: constructing bridges between reality and knowledge Measurement science: constructing bridges between reality and knowledge , , IEEE Inst. IEEE Inst. LM, D.Petri, Meas. Mag. , 2014 , 2014 Meas. Mag. P.Micheli, LM, The theory and practice of performance measurement The theory and practice of performance measurement , , Management Accounting Research Management Accounting Research , , P.Micheli, LM, 2014 2014 LM, M.Wilson, An introduction to the Rasch measurement approach for metrologists An introduction to the Rasch measurement approach for metrologists , , Measurement Measurement , , LM, M.Wilson, 2014 2014 A.Frigerio, A.Giordani, LM, A.Frigerio, A.Giordani, LM, On representing information: a characterization of the analog/digital On representing information: a characterization of the analog/digital distinction , distinction , Dialectica Dialectica , 2013 , 2013 LM, LM, A quest for the definition of measurement A quest for the definition of measurement , , Measurement Measurement , 2013 , 2013 LM, A.Giordani, LM, A.Giordani, Quantity and quantity value Quantity and quantity value , , Metrologia Metrologia , 2012 , 2012 LM, P.Carbone, D.Petri, LM, P.Carbone, D.Petri, Measurement fundamentals: a pragmatic view Measurement fundamentals: a pragmatic view , , IEEE Trans. Instr. Meas. IEEE Trans. Instr. Meas. , 2012 , 2012 A.Giordani, LM, Measurement, models, uncertainty Measurement, models, uncertainty , , IEEE Trans. Instr. Meas. IEEE Trans. Instr. Meas. , 2012 , 2012 A.Giordani, LM, A.Giordani, LM, Property evaluation types Property evaluation types , , Measurement Measurement , 2012 , 2012 A.Giordani, LM,
The (meta-)message: metrology is less monolithic The (meta-)message: metrology is less monolithic than possibly supposed “from the outside” than possibly supposed “from the outside” Taking a look at the ways it is differently interpreted Taking a look at the ways it is differently interpreted may suggest some hypotheses on how may suggest some hypotheses on how the sciences of physical and non-physical measurement the sciences of physical and non-physical measurement could learn from each other could learn from each other The proposal: The proposal: a short discussion on four interpretations a short discussion on four interpretations of what metrology is, of what metrology is, each from a strict, traditional standpoint each from a strict, traditional standpoint toward a broader, encompassing view toward a broader, encompassing view
… with a premise, with a premise, … aimed at providing a context for the discussion aimed at providing a context for the discussion and hopefully at sharing some basic concepts and terms and hopefully at sharing some basic concepts and terms
Joint Committee Joint Committee for Guides in Metrology for Guides in Metrology (JCGM) (JCGM) (established in 1997) BIPM Int.l Bureau of Weights and Measures BIPM Int.l Bureau of Weights and Measures OIML Int.l Organization of Legal Metrology OIML Int.l Organization of Legal Metrology ISO Int.l Organization for Standardization ISO Int.l Organization for Standardization IEC Int.l Electrotechnical Commission IEC Int.l Electrotechnical Commission ILAC Int.l Laboratory Accreditation Cooperation ILAC Int.l Laboratory Accreditation Cooperation IUPAP Int.l Union of Pure and Applied Physics IUPAP Int.l Union of Pure and Applied Physics IUPAC Int.l Union of Pure and Applied Chemistry IUPAC Int.l Union of Pure and Applied Chemistry IFCC IFCC Int.l Federation of Clinical Chemistry and Lab. Medicine Int.l Federation of Clinical Chemistry and Lab. Medicine
Joint Committee Joint Committee for Guides in Metrology for Guides in Metrology (JCGM) (JCGM) (established in 1997) Metrology : Metrology : BIPM BIPM Legal metrology : OIML Legal metrology : OIML Standardization : ISO Standardization : ISO IEC IEC Accreditation : ILAC Accreditation : ILAC Domain-related : Domain-related : IUPAP (physics) IUPAC (chemistry) IUPAP (physics) IUPAC (chemistry) IFCC (clinical chemistry and lab medicine) IFCC (clinical chemistry and lab medicine)
JCGM “guidance docs” JCGM “guidance docs” the VIM the GUM http://www.bipm.org/en/publications/guides/ vim.html gum.html
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