Melbourne School of Psychological Sciences - Research Publications
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ItemConcept creepers: Individual differences in harm-related concepts and their correlates(Elsevier, 2019-09-01)Research on ‘concept creep’ argues that harm-related concepts such as abuse, bullying, prejudice, and trauma have expanded their meanings in recent decades. Theorists have suggested that this semantic expansion may have mixed implications. Broadened concepts might problematize harmful behavior that was previously tolerated but might also make people over-sensitive and fragile. Two studies using American MTurk samples (Ns = 276, 309) examined individual differences in the breadth of people's concepts of harm and explored their correlates. Study 1 found reliable variations in concept breadth that were consistent across four disparate harm-related concepts. As predicted, people with broader concepts tended to endorse harm-based morality, liberal political attitudes, and high empathic concern. Contrary to prediction, younger people did not have broader concepts. Study 2 replicated the association between concept breadth and liberalism and extended the empathy finding by showing that concept breadth was associated with sensitivity to injustice toward others but not the self. In this study, people holding broader concepts were younger and tended to feel more vulnerable and entitled. These findings indicate that holding broader concepts of harm may have mixed implications.
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ItemHarm inflation: Making sense of concept creep(ROUTLEDGE JOURNALS, TAYLOR & FRANCIS LTD, 2020-01-01)“Concept creep” is the gradual semantic expansion of harm-related concepts such as bullying, mental disorder, prejudice, and trauma. This review presents a synopsis of relevant theoretical advances and empirical research findings on the phenomenon. It addresses three fundamental questions. First, it clarifies the characterisation of concept creep by refining its theoretical and historical dimensions and presenting studies investigating the change in harm-related concepts using computational linguistics. Second, it examines factors that have caused concept creep, including cultural shifts in sensitivity to harm, societal changes in the prevalence of harm, and intentional meaning changes engineered for political ends. Third, the paper develops an account of the consequences of concept creep, including social conflict, political polarisation, speech restrictions, victim identities, and progressive social change. This extended analysis of concept creep helps to understand its mixed implications and sets a multi-pronged agenda for future research on the topic.
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ItemDimensions over categories: a meta-analysis of taxometric research(CAMBRIDGE UNIV PRESS, 2020-07)Taxometric procedures have been used extensively to investigate whether individual differences in personality and psychopathology are latently dimensional or categorical ('taxonic'). We report the first meta-analysis of taxometric research, examining 317 findings drawn from 183 articles that employed an index of the comparative fit of observed data to dimensional and taxonic data simulations. Findings supporting dimensional models outnumbered those supporting taxonic models five to one. There were systematic differences among 17 construct domains in support for the two models, but psychopathology was no more likely to generate taxonic findings than normal variation (i.e. individual differences in personality, response styles, gender, and sexuality). No content domain showed aggregate support for the taxonic model. Six variables - alcohol use disorder, intermittent explosive disorder, problem gambling, autism, suicide risk, and pedophilia - emerged as the most plausible taxon candidates based on a preponderance of independently replicated findings. We also compared the 317 meta-analyzed findings to 185 additional taxometric findings from 96 articles that did not employ the comparative fit index. Studies that used the index were 4.88 times more likely to generate dimensional findings than those that did not after controlling for construct domain, implying that many taxonic findings obtained before the popularization of simulation-based techniques are spurious. The meta-analytic findings support the conclusion that the great majority of psychological differences between people are latently continuous, and that psychopathology is no exception.
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ItemThe Creeping Concept of Trauma(Johns Hopkins University Press, 2020-09-01)Over the past century the concept of trauma has substantially broadened its meanings in academic and public discourse. We document four directions in which this semantic expansion has occurred at different times: from somatic to psychic, extraordinary to ordinary, direct to indirect, and individual to collective. We analyze these expansions as instances of "concept creep," the progressive inflation of harm-related concepts, and present evidence for the rising cultural salience and semantic enlargement of trauma in recent decades. Expansive concepts of trauma may have mixed blessings for personal and collective identity.
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ItemDevelopment and validation of the Harm Concept Breadth Scale: Assessing individual differences in harm inflation(PUBLIC LIBRARY SCIENCE, 2020-08-18)Three studies (Ns = 350, 301 & 341) examined the reliability, validity, and correlates of a new measure of harm inflation, the individual differences counterpart of 'concept creep'. The Harm Concept Breadth Scale (HCBS) assesses variability in the expansiveness of concepts of harm (i.e., bullying, mental disorder, prejudice, trauma), such that these concepts refer to a wider range of phenomena among people scoring high on the scale. Study 1 developed 66 vignettes representing potential instances of the four concepts, selected optimal subsets of 10 vignettes for each concept, and demonstrated satisfactory internal consistency of the subscales. Study 2 demonstrated that the HCBS had excellent internal consistency, and established construct validity through associations with measures of moral foundations, justice sensitivity, general category inclusiveness, and political orientation. Study 3 employed participants from a different national background and further clarified the correlates of the HCBS via measures of empathy, moral expansiveness, and the Big Five personality traits. The findings indicate that concept breadth is a reliably measurable individual difference variable with weak to moderate associations with harm-based morality, prosocial concern, political liberalism, female gender, and negative emotionality. The HCBS is a valid psychometric instrument for examining the causes and implications of harm inflation.
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ItemTwentieth century morality: The rise and fall of moral concepts from 1900 to 2007(Public Library of Science (PLoS), 2019-02-27)Trends in the cultural salience of morality across the 20th century in the Anglophone world, as reflected in changing use of moral language, were explored using the Google Books (English language) database. Relative frequencies of 304 moral terms, organized into six validated sets corresponding to general morality and the five moral domains proposed by moral foundations theory, were charted for the years 1900 to 2007. Each moral language set displayed unique, often nonlinear historical trajectories. Words conveying general morality (e.g., good, bad, moral, evil), and those representing Purity-based morality, implicating sanctity and contagion, declined steeply in frequency from 1900 to around 1980, when they rebounded sharply. Ingroup-based morality, emphasizing group loyalty, rose steadily over the 20th century. Harm-based morality, focused on suffering and care, rose sharply after 1980. Authority-based morality, which emphasizes respect for hierarchy and tradition, rose to a peak around the social convulsions of the late 1960s. There were no consistent tendencies for moral language to become more individualist or less grounded in concern for social order and cohesion. These differing time series suggest that the changing moral landscape of the 20th century can be divided into five distinct periods and illuminate the re-moralization and moral polarization of the last three decades.