IntelligencePub Date : 2023-03-01DOI: 10.1016/j.intell.2023.101736
Cesare Cornoldi , David Giofrè , Enrico Toffalini
{"title":"Cognitive characteristics of intellectually gifted children with a diagnosis of ADHD","authors":"Cesare Cornoldi , David Giofrè , Enrico Toffalini","doi":"10.1016/j.intell.2023.101736","DOIUrl":"10.1016/j.intell.2023.101736","url":null,"abstract":"<div><p>Some children may be intellectually gifted, and yet experience behavioral and academic difficulties. We examined 82 twice exceptional children (2e-ADHD), having an excellent General Ability Index (GAI) derived from the Wechsler Intelligence Scale for Children-IV (GAI ≥ 125), and a diagnosis of Attention Deficit and Hyperactivity Disorder (ADHD). They accounted for 8.8% of a large sample of children with ADHD, which is twice as high as the proportion of intellectually gifted children in a typical population. This over-representation does not reflect a misdiagnosis of ADHD, as these children showed the typical features predicted on the grounds of data regarding the ADHD sample, including lower scores in working memory and processing speed measures, combined with the inclusion criteria for giftedness. Based on information concerning intellectually gifted children with either a Specific Learning Disorder (SLD) or typical development, we observed that these characteristics of intelligence are similar to those seen in SLD, but not in typical development, irrespective of whether 2e-ADHD children had a comorbid SLD.</p></div>","PeriodicalId":13862,"journal":{"name":"Intelligence","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44652753","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
IntelligencePub Date : 2023-03-01DOI: 10.1016/j.intell.2023.101730
Dominique A. Eichelberger , Fabio Sticca , Dinah R. Kübler , Tanja H. Kakebeeke , Jon A. Caflisch , Oskar G. Jenni , Flavia M. Wehrle
{"title":"Stability of mental abilities and physical growth from 6 months to 65 years: Findings from the Zurich Longitudinal Studies","authors":"Dominique A. Eichelberger , Fabio Sticca , Dinah R. Kübler , Tanja H. Kakebeeke , Jon A. Caflisch , Oskar G. Jenni , Flavia M. Wehrle","doi":"10.1016/j.intell.2023.101730","DOIUrl":"10.1016/j.intell.2023.101730","url":null,"abstract":"<div><p>Mental abilities and physical growth are important determinants of health across the lifespan. Here, the stability of these traits was assessed from 6 months to 65 years of age to investigate periods of stability and malleability. Mental abilities, height, and weight were assessed at 11 time-points in participants of the Zurich Longitudinal Studies. Individuals with more than three missing data points per trait across the 11 assessment time-points (i.e., more than approx. 25% missing data) were excluded from further analyses (final <em>N</em> = 281). Bivariate cross-time correlations showed that the stability of mental abilities was low in infancy and gradually increased. The stability of growth measures was uniform across development, with height being highly stable and weight moderately so. When a latent model was used, the overall stability of mental abilities approached that of weight. The findings indicate that stability and malleability across development differ between mental abilities and growth measures. This requires consideration in interventions targeting these traits as facilitators for improving health outcomes.</p></div>","PeriodicalId":13862,"journal":{"name":"Intelligence","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45828356","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
IntelligencePub Date : 2023-03-01DOI: 10.1016/j.intell.2023.101731
David Becker, S. Bakhiet, A. Alshahomee, Abdelbasit Gadour, Fadil Elmenfi, Y. Essa, E. Dutton
{"title":"Opinions on intelligence: An Arab perspective","authors":"David Becker, S. Bakhiet, A. Alshahomee, Abdelbasit Gadour, Fadil Elmenfi, Y. Essa, E. Dutton","doi":"10.1016/j.intell.2023.101731","DOIUrl":"https://doi.org/10.1016/j.intell.2023.101731","url":null,"abstract":"","PeriodicalId":13862,"journal":{"name":"Intelligence","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"54477590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
IntelligencePub Date : 2023-03-01DOI: 10.1016/j.intell.2023.101720
Marco Koch , Nicolas Becker , Samuel Greiff
{"title":"What lies beneath the structure of intelligence? Overview of the special issue on the processes underlying intelligence","authors":"Marco Koch , Nicolas Becker , Samuel Greiff","doi":"10.1016/j.intell.2023.101720","DOIUrl":"10.1016/j.intell.2023.101720","url":null,"abstract":"","PeriodicalId":13862,"journal":{"name":"Intelligence","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45331643","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
IntelligencePub Date : 2023-03-01DOI: 10.1016/j.intell.2023.101731
David Becker , Salaheldin Farah Bakhiet , Alsedig Abdalgadr Alshahomee , Abdelbasit Gadour , Fadil Elmenfi , Yossry Ahmed Sayed Essa , Edward Dutton
{"title":"Opinions on intelligence: An Arab perspective","authors":"David Becker , Salaheldin Farah Bakhiet , Alsedig Abdalgadr Alshahomee , Abdelbasit Gadour , Fadil Elmenfi , Yossry Ahmed Sayed Essa , Edward Dutton","doi":"10.1016/j.intell.2023.101731","DOIUrl":"https://doi.org/10.1016/j.intell.2023.101731","url":null,"abstract":"<div><p>The issue of cultural differences in how the concept of intelligence is understood has long been debated. But do such differences really exist and, if so, to what extent do they exist and between which cultures are they the most pronounced? To better understand this, we translated a survey from <span>Warne and Burton (2020)</span> on beliefs about intelligence into Arabic, distributed it among psychology and non-psychology students and lecturers at universities within the Arab world, and compared our results with those from the US given by Warne and Burton, and with the current state of research. The survey consisted of 83 items about theories regarding the meaning and testing of intelligence. From our sample of up to 327 Arabic-speaking participants, we found that replies are overall similar to those from the US (<em>r</em> = .59; <em>N</em><sub>items</sub> = 63), while both samples showed hardly any congruence with the current state of research. Agreements between the Arab and US-sample are mostly to be found on questions in which abilities are seen as important components of intelligence, while Arabs question the predictive validity of IQ test scores for life success much more than do their Western counterparts. Based on our results, we conclude that there is little evidence for the existence of cultural bias in points of view about intelligence research and that the concept of cultural non-transferability – or “cultural bias” – must be examined more critically.</p></div>","PeriodicalId":13862,"journal":{"name":"Intelligence","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49720123","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
IntelligencePub Date : 2023-03-01DOI: 10.1016/j.intell.2023.101733
Gilles E. Gignac , Marcin Zajenkowski
{"title":"Still no Dunning-Kruger effect: A reply to Hiller","authors":"Gilles E. Gignac , Marcin Zajenkowski","doi":"10.1016/j.intell.2023.101733","DOIUrl":"10.1016/j.intell.2023.101733","url":null,"abstract":"<div><p>The primary criticism raised by Hiller (2023) pertained to the transformation of the self-assessed intelligence (SAI) scores applied by Gignac and Zajenkowski (2020), an investigation that suggested the Dunning-Kruger effect (DKE) may be primarily a statistical artefact. Hiller recommended an alternative transformation. Our re-analysis of Gignac and Zajenkowski's data with Hiller's recommended transformation failed to find evidence in favour of the DK hypothesis. Hiller also recommended SAI measurement with a percentile-based approach. Based on a review of the literature, one investigation has employed a percentile-based approach to SAI measurement, and it largely failed to support the DK hypothesis, when analysed with the non-linear regression approach recommended by Gignac and Zajenkowski. We conclude by encouraging researchers to continue to derive novel approaches to testing the DK hypothesis, especially approaches that overcome known methodological challenges.</p></div>","PeriodicalId":13862,"journal":{"name":"Intelligence","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47206810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
IntelligencePub Date : 2023-03-01DOI: 10.1016/j.intell.2023.101732
Avram Hiller
{"title":"Comment on Gignac and Zajenkowski, “The Dunning-Kruger effect is (mostly) a statistical artefact: Valid approaches to testing the hypothesis with individual differences data”","authors":"Avram Hiller","doi":"10.1016/j.intell.2023.101732","DOIUrl":"10.1016/j.intell.2023.101732","url":null,"abstract":"<div><p>Gignac and Zajenkowski (2020) find that “the degree to which people mispredicted their objectively measured intelligence was equal across the whole spectrum of objectively measured intelligence”. This Comment shows that Gignac and Zajenkowski (2020) finding of homoscedasticity is likely the result of a recoding choice by the experimenters and does not in fact indicate that the Dunning-Kruger Effect is a mere statistical artifact. Specifically, Gignac and Zajenkowski (2020) recoded test subjects' responses to a question regarding self-assessed comparative IQ onto a linear IQ scale when a normal IQ scale would likely have been more appropriate. More generally, researchers studying self-assessed intelligence should be aware of potential measurement problems that may arise when transforming an ordinal scale onto an interval scale.</p></div>","PeriodicalId":13862,"journal":{"name":"Intelligence","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47114072","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
IntelligencePub Date : 2023-03-01DOI: 10.1016/j.intell.2023.101735
Patrick O'Keefe , Linda Wänström , Joseph Lee Rodgers
{"title":"Reframing the clouded scientific spectacles of the Flynn effect: A view through two lenses","authors":"Patrick O'Keefe , Linda Wänström , Joseph Lee Rodgers","doi":"10.1016/j.intell.2023.101735","DOIUrl":"10.1016/j.intell.2023.101735","url":null,"abstract":"<div><p>Flynn argued that the Flynn effect was due to an increasing use of “scientific spectacles” among the general population (Flynn, 2010), yet the Flynn effect itself has been viewed through clouded scientific spectacles. Most research has focused on Flynn's main finding: IQ scores have increased over time. Flynn (1987) presumed the effect was a cohort (generational) effect, yet a variety of within- and between-person processes could give rise to the observed secular changes. Many theories have been put forth as to the fundamental cause of the Flynn effect. Frequently ignored is what a specific cause implies the Flynn effect would look like at different levels of analysis and in the context of different research designs. In this paper we present two ‘lenses’ with which to view a potential causal model of the Flynn effect, in the hopes of closing some of the current gaps emerging from past research. First, we propose an examination of within- versus between-person processes. Relatedly, we propose that the exclusive focus on normed measures of intelligence has hampered understanding of what functional form the Flynn effect might take, particularly during development. Consideration of “raw” intelligence is likely to be fruitful. For our second lens, we consider the framework of age-period-cohort modeling to categorize what kind of effect a given model implies. We examine several causal theories of the Flynn effect through these lenses. Viewed through our lenses, we find that certain causal theories are, perhaps, somewhat incomplete in their specification of all the relevant processes.</p></div>","PeriodicalId":13862,"journal":{"name":"Intelligence","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48297097","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
IntelligencePub Date : 2023-03-01DOI: 10.1016/j.intell.2023.101727
Erick Almeida de Souza, Stéphanie Andrade Silva, Bruno Hebling Vieira , Carlos Ernesto Garrido Salmon
{"title":"fMRI functional connectivity is a better predictor of general intelligence than cortical morphometric features and ICA parcellation order affects predictive performance","authors":"Erick Almeida de Souza, Stéphanie Andrade Silva, Bruno Hebling Vieira , Carlos Ernesto Garrido Salmon","doi":"10.1016/j.intell.2023.101727","DOIUrl":"10.1016/j.intell.2023.101727","url":null,"abstract":"<div><p><span>Intelligence, as a general cognitive ability, shows a substantial inter-subject variation. Because of its impact on our lives, there is great interest in explaining the neural substrates of these differences. We used a large set of neuroimaging and behavioral data from 805 subjects, provided by the Human Connectome Project, and applied predictive models based on elastic-net regression using </span>functional connectivity and brain morphometric data to predict general intelligence values. Additionally, we explored the impact of brain spatial distribution of the input connectivity data in the regression model using two strategies: brain parcellation and individual components. Features derived from functional connectivity were considerably more correlated with general intelligence than cortical thickness and surface area. Considering the regularization terms in this particular prediction problem, the best performances were obtained when the impact of all the independent variables was considered in the regresion, i.e. null LASSO sparsity term. Using different parcellation schemes affected predictive performances, which indicates spatial heterogeneity in the regression. We were able to explain 17,5% of the general intelligence variance, in the best performance reached, with a brain parcellation of 25 independent components; by other hand, using only cortical morphometric features the performance reduced to 1,6% for both cortical thickness and surface area. While no component, in particular, was responsible for predicting a large portion of the variance, the spatial components with the best results comprehend parietal, frontal and occipital regions, in agreement with the Parieto-Frontal Integration Theory (P-FIT).</p></div>","PeriodicalId":13862,"journal":{"name":"Intelligence","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41969395","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
IntelligencePub Date : 2023-01-01DOI: 10.1016/j.intell.2022.101708
Gerhard Meisenberg, Richard Lynn
{"title":"Ongoing trends of human intelligence","authors":"Gerhard Meisenberg, Richard Lynn","doi":"10.1016/j.intell.2022.101708","DOIUrl":"10.1016/j.intell.2022.101708","url":null,"abstract":"<div><p>The aim of the study is to estimate the most recent trends of intelligence world-wide. We find that the most recent studies report mainly positive Flynn effects in economically less developed countries, but trivial and frequently negative Flynn effects in the economically most advanced countries. This is confirmed by an analysis of 48 countries in the 2000–2018 PISA tests, showing that high pre-existing IQ and school achievement are the best predictors of declining test scores. IQ gaps between countries are still large (e.g., 19 IQ points in PISA between East Asia and South Asia) but are diminishing world-wide. We predict that these trends, observed in adolescents today, will reduce cognitive gaps between the working-age populations of countries and world regions during coming decades. As is predicted by the well-established relationship between intelligence and economic growth, there is already evidence that the ongoing cognitive convergence is paralleled by global economic convergence. These developments raise questions as to how long this cognitive and economic convergence will continue, whether it will eliminate cognitive and economic gaps between countries entirely, and whether a condition with high levels of cognitive ability and economic prosperity is sustainable long-term.</p></div>","PeriodicalId":13862,"journal":{"name":"Intelligence","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43832739","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}