Identifying Virtues and Values Through Obituary Data-Mining
“Call no one happy until they are dead.” “Never speak ill of the dead.” If we still heed the injunctions of Solon and Chilon of Sparta, then obituaries, which represent a prominent way of expressing the human universal of grief, are a resource for philosophical anthropology. Philosophers have emphasized that we can determine what counts as a virtue for a given type of person in a given cultural context by analyzing what people say about the dead . Such judgments summarize the deceased’s life and place it in a meaningful narrative context. This is why practitioners of Acceptance and Commitment Therapy ask patients to write their own obituaries: doing so helps people clarify what they value, how they want to live, and what their lives mean . In popular culture, this attitude has recently cropped in the Black Obituary project, which was founded by Ja’han Jones in 2016 to enable Black Americans to write their own obituaries in case they become the victims of lethal police violence. He characterizes the texts as “agonizingly introspective works,” saying, “These are Black lives, as told by those who experience them in all their glory—tragedy—frustration—triumph.”1 The ability — one might even say the right and the duty — to tell the story of someone’s life, whether that life is one’s own or another’s, is a capacity we dare not neglect as self-presenting creatures. Moreover, praising the dead is a way of performatively identifying with them, which is why Aristotle said of Plato after his death that he was a “man whom bad men have no right even to praise” . And recent research on healing in social networks suggests that the death of one member often draws together those who survive .
Goethe allegedly observed that we die twice : first when we stop breathing, and again when the last of those who knew and loved us die. Philosophers such as Blustein  have persuasively argued for the duty to remember and memorialize, which involves obligations to ensure accuracy, sincerity, emotional aptness, publicity, and longevity. We do a disservice to someone’s legacy if we attribute characteristics that they did not embody, if we insincerely express our grief, if we erase or hide their characteristics, or if we let their memory fade too quickly. These sometimes-complementary, sometimes-competing injunctions have been recognized in the West as far back as Pericles’ funeral oration and Plato’s Menexenus . In these mourning texts, Pericles and Plato compete to structure the meaning and value of Athenian citizenship by telling the story of recently-deceased soldiers in a way that emphasizes either their courage (in the case of Pericles) or their dedication to justice (in the case of Plato). Both understand that how we choose to remember the deceased expressively constitutes both individual and collective values, sentiments, and relationships. Pericles uses the occasion of patriotic grief to call for public recommitment to war and conflict with Sparta and her allies. Plato uses the same occasion to reorient Athens to justice, with militarism and empire side-lighted as merely sometimes instrumental to that higher value.
Thus, obituaries and poetic elegies reveal what counts as a value, virtue, or constituent of wellbeing for a particular type of person in a particular community. Speaking well of the dead enables us to tell the story both of individuals who have passed away and of the cultures that shaped them and to which they contributed. In so doing, we weave those we held dear into the fabric of human nature, human achievement, and human possibility. The present work aims to contribute to our understanding of moral psychology by extracting individual and communal values from of this rich and under-studied collection.
2 Big Data, Experimental Philosophy, and Moral Psychology
Traditionally, philosophers working in moral psychology have focused on designing and conducting surveys and experiments to elicit judgments that speak to laypeople’s moral values and opinions. As with any study eliciting reactions from informed participants, this work is potentially limited in external validity. Studies employing vignettes from professional philosophy, such as stories involving mad scientists, runaway trolleys, and all-knowing supercomputers, run the additional risk of lacking ecological validity. While researchers have made significant progress investigating the judgments laypeople produce when prompted with extraordinary scenarios, our understanding of people’s values would also be enhanced by reviewing the values people express when prompted only by sincere feelings of love, respect, and admiration.
Because obituaries are succinct and explicitly intended to summarize their subjects’ lives, they may be expected to include only the features that the author or authors find most salient, not only for themselves as relatives or friends of the deceased, but also to signal to others in the community the socially-recognized aspects of the deceased’s character. Such posthumous descriptions have a summative character to them, so their positive or negative valence is presumably meant to evaluate the deceased’s moral identity as a whole. To the extent that obituary-writers follow the social norm of only speaking well of the dead, we can expect these evaluations to highlight the deceased’s greatest virtues.
The summative nature of death notices highlights our somewhat atypical (in the context of moral psychology and experimental philosophy) goal of studying aretaic phenomena like character and virtue. While most research on moral psychology by philosophers has focused on deontological vs. consequentialist judgments about hypothetical scenarios , our goal is instead to identify values associated with living a good life; these values may turn out to include character traits, personality traits, institutional affiliations, social roles, and personal attachments. Indeed, our work indicates that much of the current philosophical study of lay values is working with an impoverished conception of the normative domain.
This is not to say that character, virtue, and social identity have been ignored by moral psychologists. Several approaches have been developed to study lay values, including the models of Schwartz  and Graham et al. . Schwartz’s research suggests that values are embodied in complex, non-linear networks, an insight that we draw on in our analysis of funerary texts. Graham et al.  counted the number of value-laden words in sermons from politically liberal and conservative churches to support inferences about relative value structures within liberal and conservative groups more generally. They thus utilized a lexical approach to understanding evaluative language, according to which everyday language reflects folk conceptions of the nature of morals and values more generally. This approach starts from the thought that ideas that are particularly important to a community will naturally gain expression in that community’s language, often as discrete descriptors (e.g., “loyal,” “authoritarian,” “nature-loving”). This type of lexical approach has a well-established history in the study of personality traits, a field that is also beginning to re-introduce evaluative terms (e.g., “wicked”) to what it considers descriptors of traits .
We believe that obituaries are an especially promising resource for several pragmatic reasons, in addition to the theoretical considerations mentioned above. First, obituaries, unlike other value-laden corpora such as sermons, diaries, and letters, are published in newspapers and readily available online. Second, it is at least conceptually straightforward to use metadata to segment obituaries (and therefore populations and sub-populations) based on potentially moderating variables such as age, location, gender, and so on. Third, obituaries tend to focus primarily on moral values and virtues.
We expect the values expressed in these records to be diverse but also interconnected. Different communities and individuals are unlikely to unanimously agree on a single set of norms or ideals, but it would be equally surprising to find no significant overlap. Thus, the ideal approach to analyzing these texts will be sensitive to the heterogeneity in the various ways that we praise the dead. This analysis could be conducted by developing an extensive list of correlations between terms and phrases, but human observers have little to gain from a sprawling list of correlations between hundreds of variables. Thus, where we aim to present a holistic picture of the virtues expressed by each community, we will do so in the form of network graphs simultaneously representing hundreds or thousands of relations in a single, easily digestible picture.
We report two approaches – one employing expert coding, the other employing machine coding – to the scientific study of virtue and value through obituaries. Studies 1 and 2 employed hand-coding, in which obituaries were carefully read and labeled. Study 3 further develops the results of studies 1 and 2 with a semi-automated, large-scale semantic analysis of several thousand obituaries. We conclude by reflecting on some philosophical implications of these studies, as well as prospects for further research.
2.1 Study 1: Local Obituaries
Given our goal of using obituaries to better understand laypeople’s values, we aimed to select obituaries that are broadly representative of the general public’s values, insofar as this is possible. To this end, we selected local newspapers with obituaries of people from all walks of life instead of targeting obituaries of larger newspapers that selectively write about famous individuals. We realized that obituaries from newspapers such as The New York Times would be both more selective (only covering a few famous or infamous individuals) and more comprehensive (written with the goal of telling rich and captivating stories of those few individuals whose lives were deemed worthy of note). We also found that, while Times obituaries are authored by professional writers, the obituaries in local newspapers are typically composed by laypeople with personal relationships with the deceased. The stories of (in)famous individuals in the Times include a full range of virtues, vices, and value-neutral descriptions. Our initial goal, though, was to target obituaries as a means of developing a better understanding of positively (or at worst neutrally) valenced terms.
Obituaries published between November 2013 and January 2014 were collected from newspapers in four cities: The Register Guard (Eugene, Oregon), The Mat-Su Valley Frontiersman (Wasilla, Alaska), The Flint Journal (Flint, Michigan), and The Hampshire Gazette (Amherst, Massachusetts). These were read with an eye to agent-level descriptions of the deceased (e.g. ‘hard-working’, ‘honest’, ‘generous’). General categories of traits were developed inductively as obituaries were read; put differently, trait terms were manually, iteratively recorded verbatim and then summarized as the reader found other terms that shared a theme. For example, ‘hiker’ and ‘fisherman’ could be jointly summarized in the bigram ‘nature-lover’. Given its exploratory and close-reading approach, this process utilized the expertise of the coder as a values-literate reader of American English rather than predefined rules for coding. Additional categories were added as new types of descriptions were found that did not match extant labels.
Descriptive statistics for local obituaries in Eugene, Wasilla, Flint, and Amherst
Figure 1 displays the traits and values ascribed to the deceased in Eugene. This graph depicts trait frequency with size (e.g., obituary writers highlighted volunteering more often than integrity, represented by the fact that “volunteer” is larger than “integrity” in the graph). Gender differences are represented with label coloring, with terms colored red to the extent that they tended to be ascribed to women, blue to the extent that they tended to be ascribed to men, and black for terms that were roughly equal in frequency after adjusting for total word count of male and female obituaries. Finally, line thickness and color represent the frequency of co-occurrence of traits, with thick green lines indicating pairs of terms that were frequently ascribed to the same individual. A label’s position is not meaningful on its own, but positions carry meaning in relation to the positions of every other node. In graphs such as this, node positions are determined by an iterated application of an algorithm with three primary factors: (1) gravity, pulling all nodes to the center, (2) attraction, pulling nodes together if they are connected by an edge, with the strength of the attraction determined by the weight of the edge, and (3) repulsion, whereby all nodes are pushed away from all other nodes.
As with the obituaries from Eugene and Wasilla, gender differences were seen in the obituaries from Flint (above) and Amherst (below), but these graphs are colored to identify clustering of traits because the larger samples from these cities allowed for a more meaningful analysis of clusters of nodes, with clustering analyzed using Gephi’s Modularity Measure.
In addition, we combined the data for all four towns to create a gender-contrast map for the full dataset (Figure 5).
To represent the combined data from local obituaries in more detail, nodes were assigned into four groups based on their edge weights using an algorithm introduced by Blondel et al. . The four figures below show these four clusters of strongly interconnected descriptions.
Naturally, these visualizations are only one perspective on the value-networks of the communities they represent. We believe, though, that they point to underutilized approaches to moral psychology. Experiments eliciting reactions to vignettes serve to identify causal relations. Studies employing neuroimaging may help us to identify the mechanisms at work, but our progress on these fronts will be limited by the conceptual frameworks employed, and naturalistic observation is needed to verify that the conclusions drawn from controlled studies accurately reflect the lived values of study participants.
Consider, for example, the groundbreaking fMRI studies conducted by Greene and colleagues (Greene et al. ; Greene & Haidt ; Greene et al. ). These researchers presented evidence that reason and emotion each play a significant role in shaping people’s moral judgments, and that characteristically consequentialist judgments are more likely to arise from cognitive deliberation whereas characteristically deontological judgments depend more on emotional reactions. While we acknowledge the value of Greene’s work, it also serves as a case study highlighting the shortcomings of experimental work unconstrained by naturalistic observation. In a follow-up fMRI study, Kahane et al.  offer reasons to think Greene et al.’s results stem from a biased set of thought experiments, such that the distinction between consequentialist and deontological judgments is not the best explanation for the neurological differences in their subjects. More broadly, sociologists of science such as Abend  have questioned the narrow focus of much recent research in moral psychology, calling for renewed efforts to understand virtues and values in addition to the differences between processes associated with consequentialist and deontological reasoning. Horne & Powell  argue in a similar vein that, while emotions bear on moral judgment, they do so in a more complex way than Greene and colleagues have suggested. Just as our work differs from Graham et al.’s lexical approach in not predefining the semantic framework, so it also differs from Haidt and Greene’s work in neuropsychology by not predefining the set of relevant character traits or behaviors. More generally, the field of ethics-oriented experimental philosophy has been criticized for narrowly focusing on deontology vs. consequentialism at the expense of the larger and richer body of normative concepts applied by lay people [19, 20]. Insofar as the results presented here reflect ordinary moral conceptualization and practice, this criticism has some merit.
The practice of eliciting one-dimensional evaluations of bizarre stories also raises concerns about ecological validity. Casebeer & Churchland  observe that moral cognition is typically affective, social, organic, genuine, and based on a broad, distributed network of neural mechanisms. These features cannot be fully replicated in the lab, indicating that naturalistic observation is especially valuable in studying moral psychology. While our chosen datasets may have shortcomings, ecological validity is certainly not one of them. The information gathered here comes from real people describing those they knew intimately; as such, these texts are affectively rich and genuine, intentionally social, and free of any possible experimenter bias (though not, presumably, of other biases such as selection bias). In studying value-laden discourse “in the wild,” we provide the field of moral psychology an important tool for assessing existing theoretical frameworks.
We will discuss these graphs further below, but it is worth noting already that the vast majority of terms identified by this method refer to virtues, values, or constituents of well-being. This is especially clear if the notion of a virtue is construed broadly to include affiliations and social roles. As Adams  and Alfano [23, 24, 25] have argued, such affiliations and social roles may constitute virtues or vices under certain conditions. Another thing to notice is that, while there are some noticeable differences in the value networks of different towns, the main source of differences is gender. There are two interesting aspects to these gender differences. First, women’s obituaries tend to focus more on domestic and care-related affairs (e.g., ‘nurse’, ‘volunteer’), whereas men’s tend to focus more on public and political matters (e.g., ‘sports fan’, ‘veteran’). This is not particularly surprising, as these are highly stereotyped behaviors. We therefore regard this finding primarily as a proof of concept. However, to the extent that such stereotypical values are celebrated (and other values are not), women and men both presumably face social pressure to live up to different normative standards — which may burden both groups in different ways. This indicates that studying obituaries may help us to identify gender-based cultural constraints on autonomy. Second, some of the dispositions that are differentially associated with women (e.g., ‘tough’, ‘survivor’) bear a remarkable resemblance to the “burdened virtues” that Lisa Tessman  defines as “traits that make a contribution to human flourishing […] only because they enable survival of or resistance to oppression.” If this is on the right track, the study of obituaries can unearth both the normative expectations that constrain the virtues and values someone is taken to be capable of embodying (via stereotyping) and the burdened virtues she may end up cultivating in the face of systematic oppression.
2.2 Study 2: New York Times Obituaries
We anticipated that local newspapers would be a useful place to look for variability in expressions of commonly shared values. However, we also wished to investigate the obituaries of significant figures because these might give us a better picture of the dispositions of people who are commonly seen as great or otherwise noteworthy. It might be that people generally take certain traits, such as honesty and dedication, to be virtuous for friends and loved ones, while evaluating famous individuals using different normative criteria, perhaps differentially valuing traits such as leadership and decisiveness. Following Zagzebski  on exemplarist virtue theory and Alfano  on its Nietzschean variant, we consider someone a candidate moral exemplar if they evoke strong emotions such as admiration. There is no established index of admiration, so this definition must be operationalized in an empirically tractable way. We do so by assuming that individuals who are memorialized in the New York Times are candidate exemplars. To explore the differences between lay values and elite values, as well as the values of candidate exemplars, we read and coded obituaries from The New York Times, following a similar set of methods as in study 1.
All obituaries published by The New York Times from 1 October 2013 to 1 February 2014 were read and analyzed. As with study 1, information was gathered on the age at death, gender, and traits of the deceased.
A total of 74 obituaries (13% female) from The New York Times were read and labeled based on trait-ascriptions found in the obituaries. Three-hundred thirty-seven trait types were included in the sample, with an average of 8.5 traits per obituary. These data were then translated into a network format, treating co-occurrence of a trait within an obituary as an undirected edge between trait nodes, resulting in 3,939 edges. The resulting network is displayed in Figure 6.
Value-maps like the one in Figure 6 represent a complex social structure of valuation. They show what journalists at the Times consider important about praiseworthy and noteworthy individuals.2 These results show that the most common person-level descriptor in such obituaries is ‘honored’, an indication that these individuals inspire strong positive emotions. Unlike the obituaries from local papers, these hardly mention family, friends, and local community. Instead, they focus on larger communities (e.g., ‘civil rights advocate’), intellectual accomplishments (e.g., ‘author’), and leadership. Compared to the network of traits from ordinary obituaries, the Times network has a lower network density (.066 vs. .115), a slightly higher mean clustering coefficient (.875 vs. .806), and higher modularity (.454 vs. .121).3 This is at least partially explained by the lower number of individuals represented and the wider range of terms used to describe these individuals, but the difference in network modularity is likely also explained by greater eccentricity of the people written about in the Times. Obituaries in the Times also contain more negative terms than those in local papers. This is consistent with the fact that many exemplars inspire not simple admiration, as Zagzebski  suggests, but deep ambivalence. Many exemplars, such as Socrates, Jesus, Rosa Luxemburg, Malcolm X, Harvey Milk, and Dian Fossey, met violent ends that presumably stemmed from emotions other than admiration. By examining Figure 6, we can see that female exemplars in particular often inspire ambivalence rather than simple admiration. In addition, they often embody burdened virtues (e.g., ‘outspoken’, ‘curmudgeonly’).
2.3 Study 3: Large-Scale Data-Mining of Local Obituaries
After manually reading, coding, and analyzing over one thousand obituaries in studies 1 and 2, we were interested in developing methods for automatically encoding the traits ascribed in obituaries on a significantly larger scale. Hand-coding has clear advantages, especially with regards to our confidence that sampled obituaries are correctly parsed as ascribing traits to the deceased (rather than, say, commending caretakers for their devotion to the deceased). However, if an automated or semi-automated process should turn out to give similar results to the results of manual reading, we could be reasonably confident that the automated processes are not too compromised by misapplications of terms to the deceased (false positives) or missing content (false negatives) to render their results suspect. To gather more data and to test general reliability of a semi-automated data-mining process, we sought to test new methods on a batch of several thousand obituaries.4
Obituaries were collected from ObituaryData.com in collaboration with the Alumni Office of a medium-sized public university in the United States. ObituaryData.com is a data-warehousing company that maintains a subscription to the United States’ Social Security Death Master File, allowing a wide and nearly complete sample of deaths and respective obituaries within the United States. The University Alumni Office’s account included permission to search the full text of all archived obituaries for keywords including the university’s name and most common abbreviation of the university. We conducted automated acquisition of the entire collection of obituaries matching these terms, totaling 13,209 records from March 2000 to May 2014 and containing over 3.9 million words.
Gathered records comprised the following information about the deceased: name, city and state of residence, date of birth, date of death (or, lacking this, date of obituary publication), and full-text obituary content. Age in years at death was calculated from date of birth and date of death. In addition, forenames of the deceased were used to guess gender (Female, Male, or Unknown). To accomplish this, we compiled the most popular 4,275 female and 1,219 male names in the US as of 2005, based on 1990 US Census Bureau Data and other sources in 2005. The female and male name-lists were each ordered by decreasing popularity of name. The forename of the deceased in each gathered obituary record was then compared with both lists and assigned the gender of whichever list in which it appeared higher (e.g., if the name of the deceased was given as “Bobby” in the obituary record, the record was listed as “Male,” because “Bobby” was listed as a more popular male than female name in the Census Bureau name lists).
Adjectives (e.g., “Honorable”) were preferable to past participles (e.g., “Honored”), which were preferable to gerunds (e.g., “Honoring”), which were preferable to nouns (e.g., “Honor”).
Words (e.g., “Adventist”) were preferable to phrases (e.g., “Adventist Church”).
Singular nouns (e.g., “Airplane,” to describe a theme of a pilot’s life) were preferable to plural nouns (e.g., “Airplanes”).
Person-descriptors (e.g., “Pilot”) were preferable to “themes” (e.g., “Airplane”).
After two members of the research team had made independent judgments on conflicting terms, we used the openNLP (open Natural Language Processing) package in R  to automatically tag each suggestion by Part of Speech (POS), including its singular vs. plural status for count nouns. Conflicting judgments were then automatically resolved using the rules above. Conflicts unresolved in this automated way were then resolved manually by the remaining research team member. Through this process, for example, “accomplish,” “accomplished,” “accomplishing,” “accomplishment,” and “accomplishments“were all replaced with “accomplishment.” In doing so, we ran the risk of conflating semantically distinct terms in some contexts; however, this approach was preferable to not identifying the semantic similarity of these terms in the majority of contexts where they might be used more or less interchangeably.
With the texts filtered and cleaned, we then constructed a semantic map of the obituaries, treating co-occurrence of terms X and Y within the same obituary as an undirected edge in a network. This resulted in a network of 910 nodes and 19,034 edges. Given the scale of this network, it would not be informative to present a visual representation of it in its entirety. Thus, we instead developed the simplified visualization shown in Figure 7, which collapses closely-connected nodes into a single group node. Using Gephi’s modularity measure (resolution = 1.0), nodes were assigned to groups based on which terms tended to be clustered together. Groups of nodes were then treated as individual nodes.
In Figure 7, nodes represent large sets of trait terms.
Before we initiated this semi-automated analysis, it was an open question whether this process would produce results similar to the results of manual reading. The results suggest that semi-automated data processing results in a network of trait-terms similar to those identified by the authors in carefully reading individual obituaries, but the results diverge from the results of study 1 in some important respects.
First, our semi-automated approach with this new corpus found a substantially higher frequency of scholarly traits. Far more people were described as writers, scientists, researchers, students, teachers, etc. In the obituaries analyzed in study 1, family, friendship and faith were consistently at the core of the network; in the current study, these traits were still frequently mentioned but were less central to the network than academic attributes. This difference is naturally explained by differences in the original data. The obituaries used for study 1 came from local newspapers where friends or relatives of any deceased person may write about the deceased, but for the present study, obituaries were filtered to include only those mentioning the university with which we were working. Thus, most people described in these obituaries were either alumni or university employees, making is unsurprising that they tend to be described with more academic language.
Second, we observed higher modularity and more distinct patterns in the clustering of traits in the present study. The network’s modularity (.514) and mean clustering coefficient (.146) differ from what was found with local papers (.121 and .806) and the Times (.454 and .875). The higher modularity is partially explained by the larger sample size. With over 13,000 obituaries to draw from, we could more easily identify the patterns of connections and disregard less frequent or accidental connections.
Third, in addition to virtues and values, which were explicitly coded for in the manual studies, this automated study turned up many constituents of well-being. While it does not seem correct to say that accomplishments, athletics, gardening, or hobbies are virtues or values, they do seem to be part of what makes some lives enjoyable or worthwhile.
3 General Discussion
We believe this research has three main philosophical implications. First, it can be used to identify under-theorized candidate virtues, values, and constituents of wellbeing. In this paper, we understand these terms intuitively, but in general we are in agreement with Zagzebski  and Alfano  on how to conceptualize virtues, with Tiberius  on how to conceptualize values, and with Parfit  on how to conceptualize wellbeing. For example, studies 1 and 3 suggest that being a sports fan is commonly conceived of as a virtue or constituent of well-being, but contemporary ethics has almost nothing to say about fandom. Is there such a virtue (or vice)? If so, what is it? Does it differ from being loyal or a community member more generally? The deceased are often praised for their volunteerism. Is there such a virtue? If so, what is it, and how does it differ from benevolence? Likewise, a sense of humor seems to be viewed as a virtue or constituent of well-being, but almost no philosophical work explores what that virtue might be. This possibility has also been raised by Harry Frankfurt , John Lippett , Adam Morton , and Robert Roberts . Roberts in particular argues that being able to laugh at oneself is essential to self-transcendence, which is involved in many virtues. Although Roberts approaches the question from a Christian point of view, he ends up agreeing with Nietzsche  that one of the most important targets of laughter is oneself – in the service of what Roberts calls self-transcendence and Nietzsche calls self-overcoming.
The search for under-theorized normative phenomena has so far been fruitful (e.g., Anthony Appiah’s Honor Code ) but haphazardly carried out. Systematically mining obituaries promises a much more comprehensive perspective.
Second, the patterns of virtues, values, and constituents of well-being represented in these maps have implications for normative ethics and the study of oppression. Whether a trait is considered a virtue for a person of your type influences whether you can see that trait as desirable or praiseworthy. By mapping virtues, values, and constituents of well-being, we uncover potentially-oppressive constraints on people’s virtues and values. As mentioned above, one conspicuous set of constraints relates to gender. Further research may uncover similar constraints (e.g., the expectation that victims of injustice, such as Black Americans, always be willing to forgive — cf. .
Third, this project contributes to the study of descriptive cultural relativism. Although cultural anthropology of the early 20th century tended to support strong versions of relativism, cross-cultural psychological work by Schwartz  and philosophical interpretations of value-pluralism  suggest that there is at least as much variance in values within cultures as there is between them. This project thus illuminates both universal human values and the kinds of values-related variability that may differentiate communities.
URL = < http://www.blackobituaryproject.com/>. Accessed 3 October 2016.
Another approach to the dispositions valued in famous individuals would be to mine the online comments on their obituaries. Still another would be to mine Twitter and other social media for posts with a ‘#RIP’ or ‘#RestInPeace’ hashtag. We conducted a pilot investigation of these prospects but found that the content was not sufficiently rich to support a scholarly analysis.
We should note that, because Gephi does not support significance-tests, we are not in position to say whether any of these differences is statistically significant. One promising area for further research is to repeat our analyses, for example, in the recently-developed network analysis R package called IsingFit (Borkulo & Epskamp ; Epskamp et al. ; Borkulo .
Another way to check the reliability and validity of automatic processing would be to use both hand-coding and machine-coding on the same corpus, then compare the results. We have not yet done this, but future research — either by ourselves or by others — should undertake it.
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