Ivan Ropovik

Ivan Ropovik
Charles University in Prague | CUNI · Institute for Research and Development of Education

PhD.

About

74
Publications
38,840
Reads
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712
Citations
Introduction
A research scientist at the Center for Meta-research in Education, Institute for Research and Development of Education, Charles University in Prague and at the Faculty of Education, University of Presov.Interested in meta-science, publication bias, psychometrics, statistical inference, and R. Personal website: www.iropovik.com
Additional affiliations
January 2020 - present
Charles University in Prague
Position
  • Principal Investigator
Description
  • Center for Meta-research in Education
September 2012 - present
University of Presov in Presov
Position
  • Researcher

Publications

Publications (74)
Article
Full-text available
This study examined the relationships between executive functions (EF) and the ability to learn problem-solving principles. It was hypothesized that there are distinct executive domains of attentional control (involving inhibition and selective attention) and cognitive flexibility (working memory and shifting) that predict the ability to learn. Nin...
Article
Full-text available
Although the measurement of cognitive performance usually relies on achievement sum scores, a growing body of research suggests that the analysis of errors made may have a predictive validity beyond that provided by the number of items correct. This study examined the validity related to one such kind of error scores-the set-loss errors-in the gene...
Article
Full-text available
The article tackles the practice of testing latent variable models. The analysis covered recently published studies from 11 psychology journals varying in orientation and impact. Seventy-five studies that matched the criterion of applying some of the latent modeling techniques were reviewed. Results indicate the presence of a general tendency to ig...
Article
Full-text available
The pattern of data underlying the successful replications of cleansing effects is improbable and most consistent with selective reporting. Moreover, the meta-analytic approach presented by Lee and Schwarz is likely to find an effect even if none existed. Absent more robust evidence, there is no need to develop a theoretical account of grounded pro...
Article
Full-text available
Because negative findings have less chance of getting published, available studies tend to be a biased sample. This leads to an inflation of effect size estimates to an unknown degree. To see how meta-analyses in education account for publication bias, we surveyed all meta-analyses published in the last five years in the Review of Educational Resea...
Preprint
Full-text available
How well can social scientists predict societal change, and what processes underlie their predictions? To answer these questions, we ran two forecasting tournaments testing accuracy of predictions of societal change in domains commonly studied in the social sciences: ideological preferences, political polarization, life satisfaction, sentiment on s...
Article
Full-text available
The COVID-19 pandemic (and its aftermath) highlights a critical need to communicate health information effectively to the global public. Given that subtle differences in information framing can have meaningful effects on behavior, behavioral science research highlights a pressing question: Is it more effective to frame COVID-19 health messages in t...
Article
Full-text available
The COVID-19 pandemic has increased negative emotions and decreased positive emotions globally. Left unchecked, these emotional changes might have a wide array of adverse impacts. To reduce negative emotions and increase positive emotions, we tested the effectiveness of reappraisal, an emotion-regulation strategy that modifies how one thinks about...
Article
Full-text available
The changes in people’s mental health have become one of the hot topics during the COVID-19 pandemic. Parents have been said to be among the most vulnerable groups in terms of the imposed anti-pandemic measures. The present paper analyzes the trends in mental health indicators in a sample of Slovak parents (N = 363) who participated in four waves o...
Article
Full-text available
This initiative examined systematically the extent to which a large set of archival research findings generalizes across contexts. We repeated the key analyses for 29 original strategic management effects in the same context (direct reproduction) as well as in 52 novel time periods and geographies; 45% of the reproductions returned results matching...
Article
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Significance Communicating in ways that motivate engagement in social distancing remains a critical global public health priority during the COVID-19 pandemic. This study tested motivational qualities of messages about social distancing (those that promoted choice and agency vs. those that were forceful and shaming) in 25,718 people in 89 countries...
Article
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Finding communication strategies that effectively motivate social distancing continues to be a global public health priority during the COVID-19 pandemic. This crosscountry , preregistered experiment (n = 25,718 from 89 countries) tested hypotheses concerning generalizable positive and negative outcomes of social distancing messages that promoted p...
Article
Full-text available
Výskumný projekt Národného programu prevencia a eliminácia rodovej diskriminácie na Inštitúte pre výskum práce a rodiny sa zameral na skúsenosti študentov a študentiek denného štúdia verejných vysokých škôl so sexuálnym obťažovaním. Kvantitatívny výskum mapoval skúsenosti s rôznymi prejavmi obťažujúceho správania, ako aj reakcie študentov a študent...
Preprint
Studying changes in people’s mental health has become one of the hot topics during the current COVID-19 pandemic. Parents were said to be among the most vulnerable groups, considering the nature of the imposed anti-pandemic measures. The present paper analyzes trends in mental health indicators in a sample of Slovak parents (N = 363) who participat...
Preprint
Full-text available
Background: From 2022, the ICD-11 includes the first mental disorder based on digital technology, “gaming disorder”, which was previously suggested as a condition for further study in the DSM-5 (2013). In this study, we provide the first large-scale network analysis of various symptom structures for these constructs to understand the complex interc...
Preprint
Full-text available
Background: This large-scale meta-analysis aimed to provide the most comprehensive synthesis to date of the available evidence on risk and protective factors for (internet) gaming disorder (as defined in the DSM-5 or ICD-11) across all studied populations.Methods: The risk/protective factors included demographic characteristics, psychological, psyc...
Preprint
Full-text available
Despite extensive research on attitudes and a rapid growth of the video game market, there is currently no meta-analysis mapping the link between narrative video games and attitude change. Here, we present such meta-analysis. The findings suggest that narrative video games affect players’ attitudes towards the topics depicted in games. This effect...
Book
Full-text available
Správa z výskumu – Sexuálne obťažovanie na vysokých školách predstavuje výsledky reprezentatívneho celoslovenského kvantitatívneho prieskumu sexuálneho obťažovania medzi študentkami a študentmi denného štúdia na Slovensku. Výsledky výskumu poukazujú nie len na mieru prevalencie obťažovania, ale poskytujú aj informácie o tom, komu sa študentky a štu...
Article
Robust scientific knowledge is contingent upon replication of original findings. However, replicating researchers are constrained by resources, and will almost always have to choose one replication effort to focus on from a set of potential candidates. To select a candidate efficiently in these cases, we need methods for deciding which out of all c...
Preprint
Full-text available
This meta-analysis explored whether being in nature and emotional social support are effective in reducing levels of stress through a Registered Report. We retrieved all the relevant articles that investigated a connection between one of these two strategies and various components of stress (physiological, affective and cognitive) as well as affect...
Preprint
Full-text available
We conducted a pre-registered meta-analysis to appraise available evidence on two stress regulation strategies: Self-administered mindfulness meditation and heart rate variability biofeedback. We used a combination of keywords to find as many experimental and observational studies as possible, all of which highlighted a link between the two strateg...
Article
Full-text available
The COVID-19 pandemic has increased negative emotions and decreased positive emotions globally. Left unchecked, these emotional changes might have a wide array of adverse impacts. To reduce negative emotions and increase positive emotions, we tested the effectiveness of reappraisal, an emotion-regulation strategy that modifies how one thinks about...
Article
Full-text available
The COVID-19 pandemic has increased negative emotions and decreased positive emotions globally. Left unchecked, these emotional changes might have a wide array of adverse impacts. To reduce negative emotions and increase positive emotions, we tested the effectiveness of reappraisal, an emotion-regulation strategy that modifies how one thinks about...
Article
Full-text available
In this crowdsourced initiative, independent analysts used the same dataset to test two hypotheses regarding the effects of scientists' gender and professional status on verbosity during group meetings. Not only the analytic approach but also the operationalizations of key variables were left unconstrained and up to individual analysts. For instanc...
Preprint
Full-text available
Effectively motivating social distancing—keeping a physical distance from others —has become a global public health priority during the COVID-19 pandemic. This cross-country preregistered experiment (n=25,718 in 89 countries) tested hypotheses derived from self-determination theory concerning generalizable positive and negative outcomes of differen...
Preprint
Full-text available
Rejoinder to Lee, S., & Schwarz, N. (2021). Grounded procedures in mind and society. Behavioral and Brain Sciences, 44(E29). doi:10.1017/S0140525X20000643
Article
Full-text available
Psychické poruchy bývajú konceptualizované ako skrytá kauzálna príčina, ktorá sa prejavuje symptómami. Táto predstava je založená na reflektívnom latentnom modeli, ktorý sa implicitne uplatňuje vždy, keď je komplexná symptomatológia sumarizovaná vo forme čísla alebo kategorického stavu. V článku sú analyzované kvantitatívne, testovateľné implikácie...
Article
Full-text available
How can we maximize what is learned from a replication study? In the creative destruction approach to replication, the original hypothesis is compared not only to the null hypothesis, but also to predictions derived from multiple alternative theoretical accounts of the phenomenon. To this end, new populations and measures are included in the design...
Article
Full-text available
How can we maximize what is learned from a replication study? In the creative destruction approach to replication, the original hypothesis is compared not only to the null hypothesis, but also to predictions derived from multiple alternative theoretical accounts of the phenomenon. To this end, new populations and measures are included in the design...
Article
How can we maximize what is learned from a replication study? In the creative destruction approach to replication, the original hypothesis is compared not only to the null hypothesis, but also to predictions derived from multiple alternative theoretical accounts of the phenomenon. To this end, new populations and measures are included in the design...
Preprint
Full-text available
One key motivating force for bonding across animals is their need to regulate body temperature, also called social thermoregulation. This phenomenon has been extensively documented in animals, but only recently its existence has been suggested in humans. Psychology, however, has been faced with conflicting findings and the social thermoregulation l...
Article
Full-text available
Over the past 10 years, Oosterhof and Todorov’s valence–dominance model has emerged as the most prominent account of how people evaluate faces on social dimensions. In this model, two dimensions (valence and dominance) underpin social judgements of faces. Because this model has primarily been developed and tested in Western regions, it is unclear w...
Article
Full-text available
Replication studies in psychological science sometimes fail to reproduce prior findings. If these studies use methods that are unfaithful to the original study or ineffective in eliciting the phenomenon of interest, then a failure to replicate may be a failure of the protocol rather than a challenge to the original finding. Formal pre-data-collecti...
Article
Full-text available
Drawing on the concept of a gale of creative destruction in a capitalistic economy, we argue that initiatives to assess the robustness of findings in the organizational literature should aim to simultaneously test competing ideas operating in the same theoretical space. In other words, replication efforts should seek not just to support or question...
Article
Full-text available
In a test of their global-/local-processing-style model, Förster, Liberman, and Kuschel (2008) found that people assimilate a primed concept (e.g., “aggressive”) into their social judgments after a global prime (e.g., they rate a person as being more aggressive than do people in a no-prime condition) but contrast their judgment away from the primed...
Preprint
Full-text available
Replications in psychological science sometimes fail to reproduce prior findings. If replications use methods that are unfaithful to the original study or ineffective in eliciting the phenomenon of interest, then a failure to replicate may be a failure of the protocol rather than a challenge to the original finding. Formal pre-data collection peer...
Preprint
Robust scientific knowledge is contingent upon replication of original findings. However, researchers who conduct replication studies face a difficult problem; there are many more studies in need of replication than there are funds available for replicating. To select studies for replication efficiently, we need to understand which studies are the...
Preprint
Full-text available
The pattern of data underlying the successful replications of cleansing effects is improbable and most consistent with selective reporting. Moreover, the meta-analytic approach presented by Lee and Schwarz is likely to find an effect even if none existed. Absent more robust evidence, there is no need to develop a theoretical account of grounded pro...
Conference Paper
Full-text available
Aktuálne diskutovaná problematika slabej replikovateľnosti výskumu má niekoľko príčin. Jednou z najzásadnejších je vysoká prevalencia takzvaných problematických výskumných praktík. Problematické výskumné praktiky sú súborom postupov a skreslení, ktoré zvyšujú výskyt falošne pozitívnych výsledkov v literatúre (prevažne týkajúcej sa behaviorálnych vi...
Preprint
Full-text available
We propose the first Registered Report examining social co-thermoregulation in humans, a widely studied phenomenon in ecology whereby animals help regulate body heat through conspecifics (for example, by huddling). Participants’ peripheral body temperature will be measured continuously while they view photos of their romantic partner, or strangers,...
Preprint
Full-text available
Psychické poruchy bývajú konceptualizované ako skrytý kauzálny faktor, ktorý sa prejavuje symptómami. Táto predstava je založená na reflektívnom latentnom modeli, ktorý sa uplatňuje vždy, keď je komplexná symptomatológia sumarizovaná vo forme čísla alebo kategorického stavu. V článku sú analyzované kvantitatívne, testovateľné implikácie tohto psych...
Conference Paper
Full-text available
Psychologický výskum sa aktuálne nachádza v stave krízy, ktorá sa označuje ako kríza straty dôvery vo vedecké poznanie alebo replikačná kríza. Aj napriek tomu, že tieto označenia upozorňujú na podstatné problémy, podľa niektorých autorov sa na súčasnú situáciu dá nazerať aj ako na renesanciu psychologického výskumu, alebo dokonca revolúciu. Cieľom...
Article
Full-text available
To what extent are research results influenced by subjective decisions that scientists make as they design studies? Fifteen research teams independently designed studies to answer five original research questions related to moral judgments, negotiations, and implicit cognition. Participants from two separate large samples (total N > 15,000) were th...
Article
Full-text available
The laser radiation absorbed by cells induces production of reactive oxygen species (ROS), followed by the development of oxidative stress. Proteins are major targets for ROS due to their abundance in biological systems. The aim of the present pilot study was to examine the effects of transcutaneous laser blood irradiation (TLBI), i.e., low-level l...
Preprint
Full-text available
Motivation and self-concept count among the educationally most relevant factors and the evaluation of many educational interventions requires their valid measurement. The present large-scale nationally representative study aimed to examine the psychometric properties of a shortened version of the Students’ Approaches to Learning questionnaire measu...
Preprint
Full-text available
Because negative findings have less chance of getting published, available studies tend to be a biased sample. This leads to a higher prevalence of false positives and the inflation of effect sizes to an unknown degree. To see how meta-analyses in education account for publication bias, we surveyed all meta-analyses published in the last three year...
Preprint
Full-text available
Over the last ten years, Oosterhof and Todorov’s valence-dominance model has emerged as the most prominent account of how people evaluate faces on social dimensions. In this model, two dimensions (valence and dominance) underpin social judgments of faces. Because this model has primarily been developed and tested in Western regions, it is unclear w...
Preprint
Replications in psychological science sometimes fail to reproduce prior findings. If replications use methods that are unfaithful to the original study or ineffective in eliciting the phenomenon of interest, then a failure to replicate may be a failure of the protocol rather than a challenge to the original finding. Formal pre-data collection peer...
Article
Full-text available
Recent in vitro studies have shown that vitamin C (Vit C) with pro-oxidative properties causes cytotoxicity of breast cancer cells by selective oxidative stress. However, the effect of Vit C in itself at different concentration levels on MCF-7 breast cancer cell line after 24 h, has not yet been described. We aimed to examine the effect of Vit C on...
Article
Full-text available
Objectives. The current study dealt with the concept of health literacy in adolescents. The main aim of the study was to examine the structure of adolescents, health literacy. The aim was also to discuss the current need and potential for the development of adolescents, health literacy in educational setting. Sample and settings. The sample compris...
Preprint
Socioeconomic status is considered to have an effect on one`s economic decision-making, inducing more myopic preferences in poor people. The relationship, however, might not be that straightforward, as economic decision-making should be also determined by financial literacy. Employing a pre-registered cross-validation procedure, we tested a structu...
Preprint
Full-text available
The present study aimed to assess the prevalence and characteristics of child sexual abuse (CSA) in a large-scale sample of Slovak late adolescents. Randomized cluster sampling was used to sample 2186 students in their final school year of secondary school with mean age of 18.6 years (SD = .7 years). The study employed the Child Sexual Abuse Questi...
Article
Full-text available
The present study aimed to assess the prevalence and characteristics of child sexual abuse (CSA) in a large-scale sample of Slovak late adolescents. Randomized cluster sampling was used to sample 2186 students in their final school year of secondary school with mean age of 18.6 years (SD = .7 years). The study employed the Child Sexual Abuse Questi...
Preprint
Full-text available
Mental simulation theories of language comprehension propose that people automatically create mental representations of real objects. Evidence from sentence-picture verification tasks has shown that people mentally represent various visual properties such as shape, color, and size. However, the evidence for mental simulations of object orientation...
Article
Full-text available
Concerns about the veracity of psychological research have been growing. Many findings in psychological science are based on studies with insufficient statistical power and nonrepresentative samples, or may otherwise be limited to specific, ungeneralizable settings or populations. Crowdsourced research, a type of large-scale collaboration in which...
Preprint
Full-text available
The psychological literature has shown that sharing one’s emotions with loved ones does not alleviate distress. We challenge this notion. In four studies (N=2581), participants were asked to recall an emotional episode (Studies 1a-2: sadness, fear, affection, joy, anger) and write about this episode. Not replicating prior work, participants shared...
Preprint
Concerns have been growing about the veracity of psychological findings. Many findings in psychological science are based on studies with insufficient statistical power and non-representative samples, or may otherwise be limited to specific, ungeneralizable settings or populations. Large-scale collaboration, in which one or more research projects a...
Preprint
Full-text available
The present study aimed to assess the prevalence and characteristics of child sexual abuse (CSA) in a nationally-representative sample of Slovak late adolescents. Randomized cluster sampling plan was used to sample 2186 secondary school students in their final school year with mean age of 18.6 years (SD = 0.7 years). The study employed the Child Se...
Article
Full-text available
Dijksterhuis and van Knippenberg (1998) reported that participants primed with an intelligent category (“professor”) subsequently performed 13.1% better on a trivia test than participants primed with an unintelligent category (“soccer hooligans”). Two unpublished replications of this study by the original authors, designed to verify the appropriate...
Article
Full-text available
[EN] In the light of the reproducibility crisis, there is a growing criticism of null hypothesis significance testing (NHST) and its output, the p-values. In fact, the intuitive interpretations of p-values are usually misleading because the p-values do not answer the questions that researchers tend to ask and their role in the context of statistica...
Article
Full-text available
Purpose The purpose of this paper is to discuss the findings of an intervention program built on the concept of children’s health literacy, particularly on its citizenship component. This intervention program employed the Investigation-Vision-Action-Change model for action-oriented teaching, where children were supported to investigate different he...