Browsing by Author "Williams M"
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- ItemA reproduction of the results of Onyike et al. (2003)(2021) Brown NJL; van Rongen J; van der Velde J; Williams M; Schönbrodt, FDOnyike et al. (2003) analyzed data from a large-scale US-American data set, the Third National Health and Nutrition Examination Survey (NHANES-III), and reported an association between obesity and major depression, especially among people with severe obesity. Here, we report the results of a detailed replication of Onyike et al.’s analyses. While we were able to reproduce the majority of these authors’ descriptive statistics, this took a substantial amount of time and effort, and we found several minor errors in the univariate descriptive statistics reported in their Tables 1 and 2. We were able to reproduce most of Onyike et al.’s bivariate findings regarding the relationship between obesity and depression (Tables 3 and 4), albeit with some small discrepancies (e.g., with respect to the magnitudes of standard errors). On the other hand, we were unable to reproduce Table 5, containing Onyike et al.’s findings with respect to the relationship between obesity and depression when controlling for plausible confounding variables—arguably the paper’s most important results—because some of the included predictor variables appear to be either unavailable, or not coded in the way reported by Onyike et al., in the public NHANES-III data sets. We discuss the implications of our findings for the transparency of reporting and the reproducibility of published results.
- ItemClimate change, health, and psychology (Invited presentation: University of Auckland Health Psychology seminar series)Williams MClimate change is a problem that is caused by human behaviour, and that presents major risks to human health – including mental health. Psychology may have a crucial role to play in terms of investigating the health consequences of climate change, and also in terms of finding strategies to mitigate its extent. In this presentation, Matt will discuss some of his research on the effects of climate change on health and human behaviours such as assault, suicide, and self-harm. He will also discuss recent research on climate change communication and battling misinformation. Matt will argue that psychology could make a significant contribution to climate change research, but that producing effective and useful research on climate change may require psychologists to make significant changes to their standard research practices.
- ItemConceptual replication of Seo (2008), “Self-efficacy as a mediator in the relationship between self-oriented perfectionism and academic procrastination”(2021-12-12) Williams M; Edwards SRIntroduction Self-oriented perfectionism is the tendency to set high standards for oneself and evaluate one’s behaviour accordingly. Based on a study of 692 students in Korea, Seo (2008) reported finding a negative relationship between self-oriented perfectionism and academic procrastination – i.e., the tendency to procrastinate on academic tasks. Furthermore, Seo reported that this relationship was completely mediated by self-efficacy. Seo’s study has been influential in the literature but to our knowledge has not yet been independently replicated. In this study we report a preregistered conceptual replication testing five hypotheses based on Seo’s key findings. Material and methods A detailed preregistration (including data processing and analysis syntax) was lodged in advance of data collection at https://osf.io/xfvd8. Participants were 575 students recruited from OECD countries using prolific.co. Academic procrastination was measured via an adapted version of the Procrastination Assessment Scale – Students, while self-oriented perfectionism was measured via the 5-item self-oriented perfectionism subscale of the Big Three Perfectionism Scale. Self-efficacy was measured via the New General Self-Efficacy Scale. Both ordinary least squares regression and structural equation modelling were used to test hypotheses. Results We found no evidence of a bivariate relationship between self-oriented perfectionism and academic procrastination in either set of analyses. However, we did find evidence of a small and negative indirect effect of self-oriented perfectionism on academic procrastination via self-efficacy. Conclusions We were only able to partially replicate Seo’s key findings, having found no evidence of a negative relationship between self-oriented perfectionism and academic procrastination.
- ItemDealing with Distributional Assumptions in Preregistered Research(PsyArXiv, 2018-10-31) Williams M; Albers CVirtually any inferential statistical analysis relies on distributional assumptions of some kind. The violation of distributional assumptions can result in consequences ranging from small changes to error rates through to substantially biased estimates. Conventionally, researchers have conducted assumption checks after collecting data, and then changed the primary analysis technique if distributional problems are observed. An approach to dealing with distributional assumptions that requires decisions to be made contingent on observed data is problematic, however, in preregistered research, where researchers attempt to specify all important analysis decisions prior to collecting data. Limited methodological advice is currently available about how to deal with the prospect of distributional assumption violations in preregistered research. In this article, we examine several strategies that researchers could use in preregistrations to reduce the potential impact of distributional assumption violations. We suggest that pre-emptively selecting analysis methods that are as robust as possible to assumption violations, performing planned sensitivity analyses, and/or supplementing preregistered confirmatory analyses with exploratory checks of distributional assumptions may all be useful strategies. On the other hand, we suggest prespecifying ‘decision trees’ for selecting data analysis methods based on the distributional characteristics of the data may not be practical in most situations.
- ItemEliciting mental models of science and risk for disaster communication: A scoping review of methodologies(Elsevier Ltd, 2022-07-01) Doyle EEH; Harrison SE; Hill SR; Williams M; Paton D; Bostrom AWe present a scoping review of methods used to elicit individuals' mental models of science or risk. Developing a shared understanding of the science related to risk is crucial for diverse individuals to collaboratively manage disaster consequences. Mental models, or people's psychological representation of how the ‘world works’, present a valuable tool to achieve this. Potential applications range from developing effective risk communication for use in short-warning situations to community co-development of future communication protocols for the co-management of risk. A diverse range of tools, in diverse fields, have thus been developed to elicit these mental models. Forty-four articles were selected via inclusion criteria from 561 found through a systematic search. We identified a wide range of direct and indirect elicitation techniques (concept, cognitive, flow, information world, knowledge, mind, and fuzzy cognitive maps, and decision influence diagrams) and interview-based techniques. Many used multiple elicitation techniques such as free-drawing, interviews, free-listing, sorting tasks, attitudinal surveys, photograph elicitation, metaphor analysis, and mapping software. We identify several challenges when designing elicitation methods, including researcher influence, the importance of external visualization, a lack of evaluation, the role of ‘experts’, and ethical considerations due to the influence of the process itself. We present a preliminary typology for elicitation and analysis and suggest future research should explore methods to assess the evolution of mental models to understand how conceptualisations change through time, experience, or public education programs. These lessons have the potential to benefit both science and disaster risk communication activities, given best practice calls for mutually constructed understanding.
- ItemExploring the needs and coping strategies of New Zealand parents in the neonatal environment(Wiley, 2022-02-17) Dodge A; Gibson C; Williams M; Ross KAim Having an infant admitted to a neonatal care facility can be highly distressing for parents given the fragile state of their child and the often-unfamiliar environment. This study aimed to explore the needs and coping strategies of parents in this setting. Methods An online qualitative survey was used to explore the needs of parents who had a child discharged from a New Zealand neonatal unit in the past 12 months. A total of 394 parents participated in the study (387 mothers, 5 fathers), providing 970 responses across three open-ended questions examining their needs, unmet needs and coping strategies. The study included participants across both neonatal intensive care units and special care baby units, with prematurity (47%) the most common reason for admission. An inductive form of thematic analysis was used to analyse the data. Results Four themes were developed that capture the needs and coping strategies expressed by parents in this study: communication and information; physical contact and access to the baby; emotional and non-medical support; and involvement, autonomy and respect. Conclusions The themes developed largely centre around the struggle parents face when confronting the uncertainty of the neonatal environment and the difficulty in establishing their parental role. Parental distress may be reduced through communicating accurate information regularly and providing empathetic understanding, while opportunities for physical contact and involvement may assist in raising parental confidence and scaffolding the journey to independent care of their infant.
- ItemLevels of measurement and statistical analyses(2021-05-24) Williams MMost researchers and students in psychology learn of S. S. Stevens’ scales or “levels” of measurement (nominal, ordinal, interval, and ratio), and of his rules setting out which statistical analyses are admissible with each measurement level. Many are nevertheless left confused about the basis of these rules, and whether they should be rigidly followed. In this article, I attempt to provide an accessible explanation of the measurement-theoretic concerns that led Stevens to argue that certain types of analyses are inappropriate with data of particular levels of measurement. I explain how these measurement-theoretic concerns are distinct from the statistical assumptions underlying data analyses, which rarely include assumptions about levels of measurement. The level of measurement of observations can nevertheless have important implications for statistical assumptions. I conclude that researchers may find it more useful to critically investigate the plausibility of the statistical assumptions underlying analyses than to limit themselves to the set of analyses that Stevens believed to be admissible with data of a given level of measurement.
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- ItemResearch methods in psychology(2018-11-22) Williams M
- ItemTesting the status-legitimacy hypothesis: Predicting system justification using objective and subjective socioeconomic status in China and the United States(Asian Association of Social Psychology and John Wiley & Sons Australia Ltd, 2022-06) Valdes EA; Liu JH; Williams MThe status-legitimacy hypothesis proposes that those who are most disadvantaged by unequal social systems are even more likely than members of more advantaged groups to provide ideological support for the very social system that is responsible for their disadvantages. Li, Yang, Wu, and Kou (2020, Personality and Social Psychology Bulletin) sought to expand the generalizability of this hypothesis by testing it in China, addressing inconsistencies surrounding the empirical support for this hypothesis by postulating that the construct of status should be separated into an objective and subjective status marker. They reported that objective socioeconomic status (SES; income and education) negatively predicted system justification, while subjective SES positively predicted system justification. In the present study we attempt to replicate and extend the work of Li et al. in a cross-cultural comparison of demographic stratified quota online samples in China and the United States. We test the status-legitimacy hypothesis using objective and subjective SES to predict system justification using cross-sectional and cross-lagged regression analyses. We received partial support for Li et al.'s findings. Specifically, subjective SES positively predicted system justification for both societies during cross-sectional and cross-lagged longitudinal analyses. However, we failed to replicate Li et al.'s findings surrounding objective SES in China during cross-sectional and cross-lagged analyses.
- ItemThe Experiences of Mothers in a Neonatal Unit and Their Use of the Babble App(2021-01-01) Gibson C; Ross K; Williams M; de Vries NTo better understand the experiences of mothers with an infant admitted to a neonatal unit and ascertain their perspectives on an available information support app, Babble, eight mothers with an infant admitted to a Level II+ neonatal unit were interviewed. Thematic analysis was utilized and responses indicated that mothers of neonates experienced challenges around adapting to the maternal role and managing their expectations of motherhood. Relationships with staff were seen as pivotal in the development of maternal confidence and essential to the overall experience. Mothers prioritized informational support, but how mothers sought out this information depended on their individual needs. Mothers who reported using the Babble app found it to be a helpful supplementary resource, tailorable to their situation. Results suggest that greater staff awareness of parental perspectives and the development of adaptable and diverse resources, ensuring parents are provided with individualized and appropriate care, is needed.
- ItemThe impact of rural policing on the private lives of New Zealand police officers(Vathek Publishing Ltd, 2010) Buttle J; Fowler C; Williams MThis article is concerned with perceived differences between rural and urban policing in New Zealand. More specifically with how officers view the effect that rural and urban policing has on their private lives and those of their family members. Using grounded theory as a research method because of its reflexivity in regard to generating questions from emergent data, 16 participants were interviewed. Seven of these participants were stationed in an urban location while nine were recruited from rural stations. The results suggest that rural policing has a greater and often more stressful impact on the private lives of police officers and their families. This suggests a need for the New Zealand Police as an organisation to engage in policy-making that gives greater recognition to the rural aspects of policing, with a particular focus being the provision of support for the families of rural officers.
- ItemValidating the workplace dignity scale(University of California Press for the Society for the Improvement of Psychological Science (SIPS), 2020-07-20) Scott-Campbell C; Williams MWorkplace Dignity has long been the subject of scholarly enquiry, although until recently the body of research has been dominated by ethnographic work. Recently, Thomas and Lucas (2019) developed the first quantitative, direct measure of perceptions of workplace dignity: the Workplace Dignity Scale (WDS). Given the importance of understanding dignity in the workplace, this study sought to replicate the initial scale validation study conducted by Thomas and Lucas, so as to further test the validity of the WDS and the reliability of the scores it produces. Moreover, the current study contributes to the ongoing methodological reform of psychology towards a transparent and rigorous science by preregistering the method and analysis script prior to collecting data. A large sample of workers (N = 812) from the United States were recruited through Prolific Academic and completed an online questionnaire that included the WDS, as well as theoretically related scales (e.g., workplace incivility). Confirmatory factor analyses indicated that the model specified by Thomas and Lucas had reasonable global fit, although it did not meet all of our criteria for good fit, and estimates of reliability (ωt) indicated that responses to items making up the two subscales of the WDS, Dignity and Indignity, had high internal consistency. Nomological analyses revealed that the Dignity subscale of the WDS was significantly correlated in the expected directions with theoretically related variables. Furthermore, the Dignity and Indignity factors of the WDS were found to highly correlate with one another, and an exploratory analysis suggested that the Indignity factor might be a methodological artefact, posing questions as to whether the two factors are qualitatively different phenomena as was argued by Thomas and Lucas. It is concluded that the WDS is a promising tool for measuring workplace dignity although refinement of the proposed measurement model may be necessary.
- ItemWas Phar Lap killed by gangsters? New research shows which conspiracies people believe in and why(2021-04-27) Marques M; McLennan J; Kerr J; Ling M; Williams M
- ItemWhat do incoming university students believe about open science practices in psychology?(SAGE Publications, 2022-07-11) Beaudry JL; Williams M; Philipp MC; Kothe EJBackground: Understanding students’ naive conceptions about the norms that guide scientific best practice is important so that teachers can adapt to students’ existing understandings. Objective: We examined what incoming undergraduate students of psychology believe about reproducibility and open science practices. Method: We conducted an online survey with participants who were about to start their first course in psychology at a university (N = 239). Results: When asked to indicate how a researcher should conduct her study, most students endorsed several open science practices. When asked to estimate the proportion of published psychological studies that follow various open science practices, participants’ estimates averaged near 50%. Only 18% of participants reported that they had heard the term “replication crisis.” Conclusion: Despite media attention about the replication crisis, few incoming psychology students in our sample were familiar with the term. The students were nevertheless in favour of most open science practices, although they overestimated the prevalence of some of these practices in psychology. Teaching Implications: Teachers of incoming psychology students should not assume pre-existing knowledge about open science or replicability.
- ItemWhy are beliefs in different conspiracy theories positively correlated across individuals? Testing monological network versus unidimensional factor model explanations(Wiley, 2022-01-27) Williams M; Marques MD; Hill SR; Kerr JR; Ling MA substantial minority of the public express belief in conspiracy theories. A robust phenomenon in this area is that people who believe one conspiracy theory are more likely to believe in others. But the reason for this “positive manifold” of belief in conspiracy theories is unclear. One possibility is that a single underlying latent factor (e.g. “conspiracism”) causes variation in belief in specific conspiracy theories. Another possibility is that beliefs in various conspiracy theories support one another in a mutually reinforcing network of beliefs (the “monological belief system” theory). While the monological theory has been influential in the literature, the fact that it can be operationalised as a statistical network model has not previously been recognised. In this study, we therefore tested both the unidimensional factor model and a network model. Participants were 1553 American adults recruited via Prolific. Belief in conspiracies was measured using an adapted version of the Belief in Conspiracy Theories Inventory. The fit of the two competing models was evaluated both by using van Bork et al.’s (Psychometrika, 83, 2018, 443, Multivariate Behavioral Research, 56, 2019, 175) method for testing network versus unidimensional factor models, as well as by evaluating goodness of fit to the sample covariance matrix. In both cases, evaluation of fit according to our pre-registered inferential criteria favoured the network model.