Abstract
Introduction
The law is a complex ecosystem, rife with ambiguity and discord such that it can be difficult to know how it works, which legislation should be applied and in some cases whether a defendant’s action falls within prohibited conduct.1–4 Legal education and practice are verbal in nature, and written text remains the primary presentation method common to both.4,5 It has been previously established that visual representation can aid those engaging with the law to organise, understand, improve collaboration and aid recall of complicated legal concepts.5–7 The inclusion of legal visualisations can reduce confusion and miscomprehension for professional and lay-person alike,
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giving rise to a potential for preventing faulty decision-making and avoiding or mitigating errors and the significant costs associated with relitigating matters.
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Yet, law students are rarely afforded the opportunity to develop the skills necessary to represent legal concepts using images or graphics, and in practice, it is more often the expert witness who presents visual artefacts to the court.
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Process maps, also known as
The case for information visualisation
Information visualisation is the study of transforming data, information and knowledge into visual representations that can more easily convey meaning.15,16 Increasingly, it is recognised that effective information visualisation holds the key to unlocking access to, and understanding complexity in, data. In 1998 law graduate McCloskey
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advocated that lawyers could benefit from learning how to
Whether for professional or lay audiences, finding appropriate tools with which to visualise and communicate information is a challenging task.22,23 In medicine, studies have investigated the positive effect of visualisations on patients’ and clinicians’ understanding of medical risk.24–26 However, outside of studies promoting their potential to improve legal research learning outcomes during jurist training, 5 we were unable to identify any study that had evaluated the potential for visualisations to impact lawyers’ and clients’ understanding of either the law, or contemplations of litigation in criminal or civil matters.
Identifying the most appropriate way to visualise information and communicate its messages depends on the presenters’ objective, the communication context and the target audience.25,27 While target audience likes and dislikes should be taken into consideration, they must not be treated as the single defining standard. 22 For instance, some audiences prefer visualisations that are simpler, but simple graphs are not always able to convey complex information, which can lead to misunderstandings. 28 Research into the use of visualisation in the medical domain found that doctors performed worst with the visualisation format they liked best, and best with the one they most strongly disliked. 29 Effective data visualisation can mitigate issues that arise when deep insight is required to analyse data and make time-sensitive decisions. 30 Visualisations mitigate the complex issues of comprehension, interpretability and navigation as the target audience traverses large amounts of information. 31 Professionals recognise the effectiveness of visualisation techniques; however it is possible that professional scepticism regarding potential benefits acts as a significant limiting factor to their use. 32 While it is difficult to know whether the specific benefits identified in the visualisation literature are generalisable to the legal domain, the predominant benefits claimed include that the use of visualisation:
allows the viewer to understand patterns and relationships not clearly visible within data.22,30,32
enhances communication of risk to a generic audience, especially one with low-numeracy skills. 33
helps professionals to focus on, assimilate and recall issue-relevant aspects. 30
improves problem solving and decision-making abilities.30,33,34
In the medical domain the absence of or ineffective information visualisations has negative effects on clinical care, time efficiency and patient safety. 35 For law, the absence of research in this area makes it difficult to say what would constitute effective or ineffective visualisation, and therefore quantify what effect the absence of ubiquitous information visualisation may be having.
Method
A collection of literature databases aggregated by the first affiliation organisation’s Law Library that included SCOPUS, DOAJ, AustLii, BAILii, HeinOnline and SSRN were searched using the terms:
(“law” or “legal”) and
(“process flow” or “process map” or “flowchart”)
Content analysis36,37 was used to identify and record instances of concepts under investigation. General concepts were initially identified deductively based on the objectives of the review. These concepts were refined inductively on first reading of the literature. All data was collected using a structured excel spreadsheet 1 from which graphs and other statistical data were developed.
Results
The literature search identified 574 articles for screening. For inclusion, works needed to provide one (or more) flowchart or process diagrams of a legislative, regulatory or lawyerly process. All works were screened and those providing: (a) no diagram; (b) diagrams not representative of a legal process, which included many that provided organisation charts of political or judicial hierarchies or houses of parliament; or (c) where the sole diagram was a PRISMA literature search diagram similar to our Figure 1, were all rejected. As shown in Figure 1, this resulted in a collection of 71 articles for inclusion in this review.

Literature search (PRISMA).
Figure 2 presents the concepts that were captured from the literature in this review. They were derived inductively from the research problem, and refined deductively on first reading of the literature collection. Just as it was possible for an article to contain one or more diagrams, it was also possible for an article to belong to one or more legal domains. For example: describing processes relevant to criminal law and procedure

Concept map for the visualisation of law and legal processes literature review.
Classification of diagrams
Diagrams in each paper were capable of classification into 11 archetypes which are described by order of frequency in Table 1, and by year of use and type in Figure 3.
Information visualisations in legal literature.

Flow or process diagrams in legal literature by year and type.
Further analysis
This research also sought to identify the existence of usage patterns for these diagrams, and if any identifiable patterns had changed over time or across legal domains. The frequency of diagram use by year of publication was recorded and is shown in Figure 3. As the most frequent type, it is not surprising that concept flows were found in every year where visualisations were identified. However, there were no discernible patterns in the distribution of visualisations during the two decades of literature included in this review.
The legal domain for both the

Flow or process diagrams by publication venue domain.
A total of 26 separate legal domains were identified from the subject context of the literature, as shown in Figure 5. The legal subject domain with the highest frequency of information visualisations was that of contract law. However, many of these could be characterised as focusing on smaller and often simpler sub-components of what are much larger processes or subject areas, such as identifying whether particular terms are consistent or cancel each other out in a contract, 61 identifying of only the start (date of signing), notice period and end points of a contract on a timeline 56 shown in Figure 6, or the pathway process shown in Figure 7 for international money transfer of loan contract funds from a debtors bank to the creditor’s bank. 50

Flow or process diagrams by legal domain (subject context).

Contract timeline from Haapio and Passera. 56 .

Loan contract international fund transfer process from Sebastianutti. 50 .
Diagrams in the area of Criminal Law and Procedure were observed almost as often, but appeared more mature. A key focus in this area was visualisation of critical decision-making processes such as those reproduced here for sentencing 62 in Figure 8, and civil jury deliberations 8 in Figure 9.

Criminal sentencing decision-making process from Dhami. 62 .

Civil jury deliberations decision-making process from Fang. 8 .
Diagrammatic representations of legislation
Legislation is often imbued with latent pathways; where the application of one section leads to consequences in another, or where a rule may be reliant on consideration of matters described elsewhere, sometimes even in a different legislative instrument. Yet, in spite of this it was rare to find diagrams that visualised the reasoning or decision-making processes inherent to such legislation. Three examples were identified and are discussed here in order of complexity. The first were small swim lane tables showing relevant sections of one law governing the responsibilities of parties in a supplier/purchaser relationship.
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The second provided a basic overview of the journey from registration of security to enforcement and seizure of financed property drawn from Australia’s

Release of Personal Medical records decision-making process from McLachlan et al. 20 .
Discussion
Our literature review supports previous but quantitatively unsubstantiated claims that: (a) the largest collection of studies in this area of legal scholarship seek visualisation in contracts; and (b) that the most frequent approach for visually representing legal theory or process was the concept flow, or
Lay comprehension
Much of the literature on lay-comprehension of law and legal concepts focuses specifically on the clarity and comprehensibility of judicial instructions, and how well juries understand and apply those directions when deliberating.63,64 While an important area for academic consideration, once a case has been handed over to the jury it is too late to begin contemplation as to whether those not trained in law but present in court have understood what occurred. Confusion around legal obligations and rights pervades all aspects of life. Improving the approach used to communicate law and legal concepts to lay people would increase participant agency, and improve legal practice and outcomes.
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It has been shown that the average person has little comprehension of the content of most legislation, and their perspective on police, crime, judges, prisons and trials often does not exceed what is found in popular culture.
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Indeed, it has even been observed that some of the documents prepared to advise the general public of their rights contain such complicated
In our role as lawyers,
Access to justice
A small number of approaches have been employed to evaluate information visualisation of law and legal process with unrepresented litigants2,3 .68,69 The overwhelming findings of these experiments has been to identify that visualisation, in combination with plain language explanation, increases overall comprehension and improves an untrained person’s ability to raise valid legal arguments. 70 In this way, visualisation has been shown to have a positive effect on access to justice.
In our roles as legislators and court staff,
Legal education and meaning
It has been said that lawyers possess a natural ability to create mental images of the law to situate themselves within the flow and circumstances of a case and visualise next steps based on precedent and past experience, 17 yet even experienced lawyers can struggle to understand legislation. 4 While there is a strong call for information visualisation techniques to be taught,4,55 aside from one reported example in 2011 at the University of Basel 5 there is little evidence in the curriculum and textbooks of most law schools that this call has been heard.
In our role as law school teachers,
Adoption
Australia began a push to improve the design of legislation in order to aid in comprehension of law through means other than text in 1995. The first call in Canada to make plain language and plain design legislation that would be visually inviting and more comprehensible came in 2000. Lawmakers in the United States received their first instruction to construct new law in
Legal researchers such as Margaret Hagan who runs the Visual Law project at the Open Law Lab of Stanford University
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have undertaken research and spoken in favour of the need for visualising complicated legal text and concepts in
In our role as legal researchers,
Conclusion
One-fifth of the 21st century has already elapsed. However, even as computing technology, an avalanche of information and increasingly more complicated new legislation continue to overwhelm both lawyer and lay-person, the call for plain-language laws coupled with information visualisation remains largely unanswered. The potential for well-crafted visualisations to improve law students, lawyers’ and the general public’s ability to engage with the law and legal system and to understand and contextualise both the law and legal processes cannot be overstated. When we consider the many thousands of academic articles, textbooks, case reports, websites, blog posts and other media published each year on an almost limitless range of legal topics, that the use of visualisations as observed in this literature review never exceeds 10 in any given year is unfortunate. More than that, it demonstrates a collective failure to rethink and improve how we draft, teach, research, communicate and practice law to empower all in society. In exposing this continuing omission across the juridical sciences, this paper has also posed four challenges to those groups and posits one final question: How can we expect communities to be cognisant of and adhere to legislation that has become so verbose and complicated as to be incomprehensible even to those who are legally educated?
Supplemental Material
sj-pdf-1-ivi-10.1177_14738716211012608 – Supplemental material for Visualisation of law and legal Process: An opportunity missed
Supplemental material, sj-pdf-1-ivi-10.1177_14738716211012608 for Visualisation of law and legal Process: An opportunity missed by Scott McLachlan and Lisa C Webley in Information Visualization
Footnotes
References
Supplementary Material
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