Abstract

Government laws and regulations increasingly place requirements on software systems. Ideally, experts trained in law will analyze and interpret legal texts to inform the software requirements process. However, in small companies and development teams with short launch cycles, individuals with little or no legal training will be responsible for compliance. Two specific challenges commonly faced by non-experts are deciding if their system is covered by a law, and then deciding whether two legal requirements are similar or different. In this study, we assess the ability of laypersons, technical professionals, and legal experts to judge the similarity between legal coverage conditions and requirements. In so doing, we discovered that legal experts achieved higher rates of consensus more frequently than technical professionals or laypersons and that all groups had slightly greater agreement when judging coverage conditions than requirements, measured by Fleiss' K. When comparing judgments between groups using a consensus-based Cohen's Kappa, we found that technical professionals and legal experts exhibited consistently greater agreement than that found between laypersons and legal experts, and that each group tended towards different justifications, such as laypersons and technical professionals tendency towards categorizing different coverage conditions or requirements as equivalent if they believed them to possess the same underlying intent.

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