20.500.12556/DKUM-76228 Ravni merjenja številne posledice preproste ideje Measurement levels Numerous Consequences of a Basic Idea Namen prispevka: Podati temeljit opis ravni merjenja, osnovnega pa vseeno zahtevnega pojma v teoriji merjenja. Raven merjenja spremenljivke ima daljnosežne posledice, tj. glede na zastavljeno raziskovalno vprašanje in preverjano domnevo, izbiro ravni merjenja ustreznih statističnih kazalcev, metod ali preizkusov domnev. Metode: Princip ravni merjenja je opisan in razložen s primeri iz vsakdanjega življenja, iz učbenikov statistike oz. metod raziskovanja ter iz varstvoslovne prakse. Podan je primer izračuna mer srednje vrednosti, ki ustrezajo ravni merjenja spremenljivk, predstavljeni so statistični testi preverjanja domnev o povezanosti pojavov, ki ustrezajo ravni merjenja uporabljenih spremenljivk. Ugotovitve: Težave študentov, pa tudi raziskovalcev pri razumevanju in uporabi zamisli ravni merjenja so razumljive, saj je zamisel dovolj zapletena, pa vseeno osnovna, tako da jo nekateri učbeniki predstavijo mimogrede in bralca ne opozorijo na daljnosežne posledice – raven merjenja spremenljivk določa ustrezne metode analize podatkov ter preizkusov domnev. Izvirnost/pomembnost prispevka: Predstavitev in razlaga ravni merjenja je namenjena študentom in raziskovalcem, da bi že pri zbiranju podatkov upoštevali in načrtovali ustrezne ravni merjenja spremenljivk in s tem preizkuse domnev ter odgovore na zastavljena raziskovalna vprašanja. Podan je načelni napotek, da naj raziskovalec spremenljivke meri na čim višji ravni (saj je v kasnejši analizi korak na nižjo raven merjenja vedno mogoč), da pa mora na drugi strani upoštevati tudi načelo ekonomičnosti, tj. ne zbirati podatkov na višji ravni, če jih za analize ne potrebuje. Purpose: In the article, a comprehensive description of measurement levels, a basic yet complex principle of measurement theory, is given. A variable’s measurement level has far-reaching consequences as regards a particular research question and a derived hypothesis, as well as for selection of an adequate statistical indices, methods, or tests. Design/Methods/Approach: The measurement levels’ principle is described and explained in terms of everyday examples and examples from statistics textbooks and criminal justice practice. It is illustrated through an example of a central tendency indices’ calculation, where all applied indices are in line with the variables’ level of measurement. For testing the hypothesis on association, adequate statistical tests which are in concordance with the level of measurement of variables involved are presented. Findings: The measurement levels present a basic yet complex principle; therefore, students‘/researchers’ difficulties are understandable. In some statistics’ text books, this principle is overlooked or described in brief without due emphasis on its far-reaching consequences: the applied statistical indices, methods, and tests must be in line with a variable’s level of measurement. Originality/Value: Presenting and explaining the measurement levels will help students and researchers to incorporate variables on the adequate level of measurement in their research planning, so that they will be able to properly test the hypothesis and thereby find the answers to their research questions. A general instruction is given that variables should be measured at the highest level possible (for the analysis, a step down to a lower level is always possible), but on the other side, the parsimony principle demands that the data collection not be performed at a higher level than the one needed for the data analyses. ravni merjenja merska lestvica mere srednje vrednosti mere razpršenosti statistični testi povezanosti true true true Slovenski jezik Angleški jezik Strokovno delo 2020-04-29 16:51:27 2020-04-29 16:51:27 2022-08-09 13:21:10 2020-04-30 03:20:30 2014 0 0 str. 362-373 št. 3 Letn. 16 2014 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 311.1 99492352 2878954 1580-0253 URN:SI:UM:DK:RDLYKWTV RAZ_Bren_Matevz_2014.pdf RAZ_Bren_Matevz_2014.pdf 1 0E64A1F95C03632CA614FFFD8E11A159 3fe9490f746af60f841a70fa93d0cc2811cf1df5812d2e68a2fbd6e174fbe0c2 49f8901b-7c11-11eb-bb7a-00155d0001ca 20.500.12556/dkum/765b3c5e-25a6-4a06-b504-34049f646a8a https://dk.um.si/Dokument.php?lang=slv&id=141716 https://www.fvv.um.si/rv/arhiv/2014-3/09_Bren.html 1 https://dk.um.si/Dokument.php?lang=slv&id=141717 https://www.fvv.um.si/rv/arhiv/2014-3/09_Bren.pdf 1 https://dk.um.si/Dokument.php?lang=slv&id=141718 Fakulteta za varnostne vede Varstvoslovje 0 0 0