{"title":"The Nolan Index: A Quantitative Measure of List Similarities","authors":"Michael C. Robbins","doi":"10.1177/02780771231162195","DOIUrl":null,"url":null,"abstract":"Several ethnobiological studies have used the Jaccard Index, a qualitative, binary measure, to compare group similarities and differences in lists of plant and animal species, medicinals, foods, cultural utilities, and so on. We extend this effort by formulating the Nolan Index, a new, more precise quantitative measure of the relative frequency of listed items to compare similarities and differences between groups . It is deployed here to evaluate the degree of similarity of free-listed, wild plants between novices and experts in rural Missouri.","PeriodicalId":54838,"journal":{"name":"Journal of Ethnobiology","volume":"43 1","pages":"12 - 18"},"PeriodicalIF":2.9000,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Ethnobiology","FirstCategoryId":"90","ListUrlMain":"https://doi.org/10.1177/02780771231162195","RegionNum":3,"RegionCategory":"社会学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ANTHROPOLOGY","Score":null,"Total":0}
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Abstract
Several ethnobiological studies have used the Jaccard Index, a qualitative, binary measure, to compare group similarities and differences in lists of plant and animal species, medicinals, foods, cultural utilities, and so on. We extend this effort by formulating the Nolan Index, a new, more precise quantitative measure of the relative frequency of listed items to compare similarities and differences between groups . It is deployed here to evaluate the degree of similarity of free-listed, wild plants between novices and experts in rural Missouri.
期刊介绍：
JoE’s readership is as wide and diverse as ethnobiology itself, with readers spanning from both the natural and social sciences. Not surprisingly, a glance at the papers published in the Journal reveals the depth and breadth of topics, extending from studies in archaeology and the origins of agriculture, to folk classification systems, to food composition, plants, birds, mammals, fungi and everything in between.
Research areas published in JoE include but are not limited to neo- and paleo-ethnobiology, zooarchaeology, ethnobotany, ethnozoology, ethnopharmacology, ethnoecology, linguistic ethnobiology, human paleoecology, and many other related fields of study within anthropology and biology, such as taxonomy, conservation biology, ethnography, political ecology, and cognitive and cultural anthropology.
JoE does not limit itself to a single perspective, approach or discipline, but seeks to represent the full spectrum and wide diversity of the field of ethnobiology, including cognitive, symbolic, linguistic, ecological, and economic aspects of human interactions with our living world. Articles that significantly advance ethnobiological theory and/or methodology are particularly welcome, as well as studies bridging across disciplines and knowledge systems. JoE does not publish uncontextualized data such as species lists; appropriate submissions must elaborate on the ethnobiological context of findings.
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