TABLE 4 - uploaded by Fernand Gobet
Content may be subject to copyright.
Source publication
![(A) The function [F(H)] of handedness (H) correlating with the score of...](publication/317426495/figure/fig1/AS:11431281238318325@1713892667210/A-The-function-FH-of-handedness-H-correlating-with-the-score-of-mathematics-in_Q320.jpg)
![(A) The function [F(H)] of handedness (H) correlating with the score of...](publication/317426495/figure/fig2/AS:11431281238332652@1713892667442/A-The-function-FH-of-handedness-H-correlating-with-the-score-of-mathematics-in_Q320.jpg)
![The function [F(H)] of handedness (H) correlating with the score of...](publication/317426495/figure/fig3/AS:11431281238332653@1713892667647/The-function-FH-of-handedness-H-correlating-with-the-score-of-mathematics-in-the_Q320.jpg)
![(A) The function [F(H)] of handedness (H) correlating with the score of...](publication/317426495/figure/fig4/AS:11431281238332654@1713892667823/A-The-function-FH-of-handedness-H-correlating-with-the-score-of-mathematics-in_Q320.jpg)
The relationship between handedness and mathematical ability is still highly controversial. While some researchers have claimed that left-handers are gifted in mathematics and strong right-handers perform the worst in mathematical tasks, others have more recently proposed that mixed-handers are the most disadvantaged group. However, the studies in...
Context in source publication
Citations
... According to (Sala et al., 2017), learners' achievement in mathematics is a matter of increased practical relevance that is the quality or state of being closely connected or appropriate. The concept of relevance is studied in many different fields, including cognitive sciences, logic, and library and information science. ...
... The correlation between handedness and mathematical ability still remarkably remains sensitive and debatable. Some researchers argued that left-handers are gifted in mathematics and strong right-handers perform woefully in mathematics activities; some others proposed that mixed handers are the most disadvantaged group (Sala et al., 2017). ...
... As observed by Sala et al. (2017), the relationship between handedness and mathematical ability is largely debatable and contentious. The literature revealed that some researchers claimed left-handers are gifted in mathematics and strong right-handers perform poorly in mathematical tasks while others have proposed that mixed handers are the most deprived/disadvantaged group. ...
Media reports on domestic violence are replete with stories of domestic violence
against women. They focus more on how husbands maltreat their wives with little
attention paid to how wives maltreat their husbands. Even when the media reports
cases of domestic violence against men, the dominant frames employed
misrepresent these cases. This study therefore investigates the newspaper framing
of domestic violence against men in Nigeria. The objectives were to establish
the frames of domestic violence, dominant frames, adopted editorial formats and
the valences of the reportage in Nigerian newspapers. The study employed the
media framing theory, and mixed methods of research designs. Two Nigerian
newspapers – Punch and Vanguard were purposively selected from the inventory
of the Nigerian Press Council. The coverage period was between January 2018
and May 2021. The choice of this period was based on the prevalence of domestic
violence stories at that period in time. Forty stories of domestic violence against men were purposively selected for content analysis while In-depth interviews were
conducted with four (4) newspaper editors. The domestic violence against men was
framed around morality (35%), conflict (25%), powerlessness (15%), economics
(12.5%), human interest (10%) and attribution of responsibility (2.5%). The dominant
frames were morality, conflict, and powerlessness. The selected newspapers
employed mainly news stories for their editorial format. More so, eighteen (18) stories (45%) were reported with a positive tone, 6 stories (15%) were reported with a negative tone, and 16 stories (40%) with a balanced tone.
... In addition to that, the present findings fail to support the other side of the literature that claims that left-handers are better in tasks that require mainly mathematic abilities and strong right-handers perform the worst in mathematical tasks. 17 It seems that financial capacity encompasses a broader range not only of mathematical tasks (eg, arithmetic and reasoning), but also of related verbal capacities and decision-making relating to conceptual knowledge as well as arithmetic skills, and therefore, the influence of handedness may not be so important compared with mood or literacy. 8,9 It is interesting that this research adds to the controversial issue of the relationship between handedness and mathematical/arithmetic abilities, that no such evidence exists for a little investigated population that is older controls as well as MCI patients and as measured through the domains of basic monetary skills, bill payment, and bank statement management. ...
... The above findings are in contrast to findings that rely on the hypothesis tested at another research, that being left-handed signifies a better decision-maker, 19 not due to brain differences, but due to lower anxiety levels as left-handed individuals may take their time over unfamiliar tasks and think through the consequences of decision-making in real life and in scenarios, and thus, left-hand dominance may be associated with a more cautious cognitive style in novel problem-solving situations. 17 In this way, left-handed individuals may counterpoise their "hypothesized" cognitive impairment-deficits compared with right-handed people and score the same as they do. This study also opens a new field of research for the unexplored differences in personality characteristics and more specifically differences in motivation to successfully complete the neuropsychological assessment that may influence the possible cognitive deficits in left-handed persons. ...
Objectives
The effects of sex and handedness on financial capacity performance remain unexplored both in healthy older adults and in patients with amnestic mild cognitive impairment (aMCI).
Methods
The aim of this study was to study the effect of the above factors (sex, handedness, and health condition), following a factorial experimental design; hence, eight groups (each with ten individuals) with similar demographic characteristics (age and education level) were formed consisting of right/left-handed, women/men and healthy/not healthy (with a diagnosis of aMCI) older adults. Mini-Mental State Examination (MMSE) was administered as a measure of general cognitive ability, and Legal Capacity for Property Law Transactions Assessment Scale (LCPLTAS) was used as an indicator of financial capacity; moreover, GDS-15 was used to assess depressive symptomatology. Self-reports of hand preference were also included.
Results
Although as expected healthy men and women regardless of their handedness outperformed aMCI patients on MMSE and LCPLTAS, performance on cash transactions, bank statement management, bill payment, financial decision making, and knowledge of personal assets from LCPLTAS is significantly higher for right-handed aMCI women compared with left-handed aMCI women.
Conclusions
Future research should further elucidate the reasons for this left-handed female patient with aMCI profile in larger groups of patients. This is an exploratory study, and the small sample size limits the strength of conclusions; further studies on this topic are needed.
... In addition, a study has shown that handedness can form an association with mathematical performances; however, more studies need to be conducted in order to understand the whole mechanism. In particular, right-handed individuals are more likely to experience a deficit in spatial ability, which affects their mathematical abilities [32]. Regarding creatively related problemsolving tasks, a study discovered that left-handed participants exhibit higher digressive schizotypal tendencies, which indicates that they tend to have better performance on divergent problem-solving tasks [33]. ...
This literature review article aimed to compile research published in recent years regarding the relationship between bodily habits, specifically handedness, and cognitive performance in memory, attention, and information processing. The article contains three chapters, discussing each aspect separately with a collection of studies and evaluations. The article is able to combine results from studies and form a model graph specialized for studies summaries. Through the synthesis of investigations, handedness seemed to have some relationship with cognition. To be more precise, ICH individuals (those people with mixed hands) have the capacity to create a connection between brain hemispheres, which enhances their performance in memory tests and allows them to better integrate divergent information. In addition, people tend to focus more on their dominant hands; this can affect a persons attention to things happening around them. Lastly, right-handed people performed better in generic cognition tests, and cross-activation of brain lateralization has been demonstrated.
... Keywords: multiplication, addition, brain lateralization, handedness, mobile learning Supplemental materials: https://doi.org/10.1037/mac0000047.supp Proficiency with mathematics is a great necessity not only to solve everyday problems but also as fundamental learning for students of science, technology, engineering, and mathematics (Sala et al., 2017). Consistent with this notion then, researchers have attempted to understand the set of cognitive and noncognitive skills that are involved in mathematical ability (Deary et al., 2007;Lubinski, 2010;Peng et al., 2016;Rohde & Thompson, 2007;Sala et al., 2017;Wai et al., 2009). ...
... Proficiency with mathematics is a great necessity not only to solve everyday problems but also as fundamental learning for students of science, technology, engineering, and mathematics (Sala et al., 2017). Consistent with this notion then, researchers have attempted to understand the set of cognitive and noncognitive skills that are involved in mathematical ability (Deary et al., 2007;Lubinski, 2010;Peng et al., 2016;Rohde & Thompson, 2007;Sala et al., 2017;Wai et al., 2009). In the case of executive functions, the set of processes that control and guide our thoughts and behavior, they are especially essential when people are faced with novel (nonroutine) situations and activities (Gilmore & Cragg, 2018), such as those we would expect to find in learning and academic performance in general (Gilmore & Cragg, 2018). ...
... In recent decades, many studies have been performed in highfunctioning individuals that evidenced possible associations between processes related to executive control and handedness (Benbow, 1986(Benbow, , 1988Beratis et al., 2009Beratis et al., , 2010Beratis et al., , 2013O'Boyle et al., 1995)one of the most extensively studied manifestation of the lateralization of human-brain function (Sala et al., 2017)-and the consequent hemispheric specialization. For example, one study revealed that in a group of well-educated young adults, left-handers outperformed right-handers in their ability to inhibit a strongly learned response (Beratis et al., 2010). ...
General Audience Summary
Researchers have tried to understand the set of cognitive and noncognitive skills involved in mathematical ability because of both its primary need in multiple situations of daily life and its unavoidable requirement for successfully pursuing certain careers. Certain brain functions, such as manual control (handedness) or speech production, are known to be controlled or influenced more by one cerebral hemisphere than the other (hemispheric lateralization). This hemispheric specialization would provide an evolutionary advantage, while conversely a weak lateralization could be associated with a delay in development. In particular, although many studies have explored the link between mathematical ability and hand preference, the relation between these two traits remains highly controversial. Moreover, the statement has been made that since these effects are subtle, their detection requires large-scale samples. Consistent with the aforementioned context, we have analyzed the longitudinal performance of more than 15,000 right-handed, left-handed, and ambidextrous individuals in single-digit and multidigit sums and products performed through an application for smart mobile devices. All our results unanimously evidenced that no significant differences exist between left- and right-handers in the speed to solve the proposed arithmetic tasks. We could observe, however, that nonlateralized (ambidextrous) users took longer to solve the tasks than lateralized individuals, with all these behaviors being consistent with the aforementioned theoretical framework. The results also revealed that these differences in speed are accentuated in advanced stages of training and in more complex operations.
... While some studies have shown that left-handers are strong in mathematics and consistent right-handers perform least, others have suggested that mixed-handers are more disadvantaged. In a more recent study, Sala, et al. (2017) concluded that the relationship between handedness group profiles and mathematical ability is complex and depends on several factors, such as age, gender and type of task. This conclusion is in line with evidence that changes in mathematical processing occur as a function of development, and that arithmetic achievement depends on domain-general as well as domain-specific knowledge (Arsalidou & Taylor, 2011). ...
Space, time and number are key dimensions that underlie how we perceive, identify and act within the environment. They are interconnected in our behaviour and brain. In this study, we examined interdependencies between these dimensions. To this end, left- and right-handed participants performed an object collision task that required space–time processing and arithmetic tests that involved number processing. Handedness of the participants influenced collision detection with left-handers being more accurate than right-handers, which is in line with the premise that hand preference guides individual differences as a result of sensorimotor experiences and distinct interhemispheric integration patterns. The data further showed that successful collision detection was a predictor for arithmetic achievement, at least in right-handers. These findings suggest that handedness plays a mediating role in binding information processing across domains, likely due to selective connectivity properties within the sensorimotor system that is guided by hemispheric lateralisation patterns.
... Witelson's theory offers a direct neurophysiological explanation for the association of consistency in hand preference (or hemispheric specialization) and corpus callosum morphology. Consequently, studies frequently refer to Witelson's findings when explaining behavioral or cognitive differences between right-and non-right handers that might be linked to the corpus callosum, even without measuring the corpus callosum itself (for some recent examples, see e.g., Jasper et al. 2021, Parker et al. 2017, Roberts et al. 2020, Sala et al. 2017, and Zapała et al. 2020. For example, callosal size differences have been used to explain superior episodic-memory performance in mixed-as compared to consistent (right)-handers (Prichard et al. 2013). ...
Following a series of seminal studies in the 1980s, left or mixed hand preference is widely thought to be associated with a larger corpus callosum than right handedness, influencing the interpretation of findings and various theories related to interhemispheric processing, brain lateralisation, and hand preference. Recent reviews, however, find inconsistencies in the literature and cast doubt on the existence of such an association. The present study was conducted to clarify the relationship between hand preference and callosal morphology in a series of meta-analyses. For this purpose, articles were identified via a search in PubMed and Web Of Science databases. Studies reporting findings relating to handedness (assessed as hand preference) and corpus-callosum morphology in healthy participants were considered eligible. On the basis of a total of k = 24 identified studies and databases, random-effects meta-analyses were conducted considering four different group comparisons: (a) dominantly right- (dRH) and left-hand preference (dLH), (b) consistent right (cRH) and non-cRH preference, (c) cRH with mixed-hand preference (MH), and (d) cRH with consistent left-hand hand preference (cLH). For none of these meta-analyses did we find a significant effect of hand preference, and narrow confidence intervals suggest that the existence of population effects larger than 1% explained variance could be excluded. For example, considering the comparison of dRH and dLH ( k = 14 studies; 1910 dRH and 646 dLH participants) the mean effect size was Hedge’s g = 0.016 (95% confidence interval: − 0.12 to 0.15; explained variance: < 0.001%). Thus, the common practice of assuming an increase in callosal connectivity based on mixed or left hand preference is likely invalid.
... Other innate factors such as handedness have been considered to play a role in creative domains such as mathematics, painting, music, and dance (Chakravarty 2009;Sala et al. 2017). Geschwind and Galaburda (1987) suggested that handedness has an innate basis. ...
This paper examines the link between cognitive processes and superior performance in contemporary dance. In the first study, thirty-six participants (professional dancers, nonprofessional dancers, and non-dancers) carried out a task in which they were asked to reproduce a sequence of dance steps while being recorded on a camcorder. Analysis revealed a significant effect of skill and task difficulty on performance. Performance correlated with individual practice, group practice, rehearsing hours, sleep, concentration, enjoyment, dyslexia, and height, but not handedness. In the second study, the same group of participants augmented by 26 participants (a total of 62 participants) completed a questionnaire. There were skill differences on deliberate practice, sleep, concentration, enjoyment of dance tasks, dyslexia, handedness, and gender differences on group practice and height. Overall, the results suggest that both practice and talent play a role in the acquisition of expertise in contemporary dance.
... Witelson's theory offers a direct neurophysiological explanation for the association of consistency in hand preference (or hemispheric specialization) and corpus callosum morphology. Consequently, studies frequently refer to Witelson's findings when explaining behavioral or cognitive differences between right-and non-right handers that might be linked to the corpus callosum, even without measuring the corpus callosum itself (for some recent examples, see e.g., Jasper et al. 2021, Parker et al. 2017, Roberts et al. 2020, Sala et al. 2017, and Zapała et al. 2020. For example, callosal size differences have been used to explain superior episodic-memory performance in mixed-as compared to consistent (right)-handers (Prichard et al. 2013). ...
Following a series of seminal studies in the 1980s, left or mixed hand preference is widely considered to be associated with a larger corpus callosum, influencing the interpretation of findings and various theories related to inter-hemispheric processing, brain lateralisation, and hand preference. Recent reviews of the literature, however, report inconsistencies in the literature and cast doubt on the existence of such an association. The aim of the present study was to systematically evaluate and meta-analytically integrate the available data on the effect of hand preference on corpus-callosum morphology. For this purpose, articles were identified via a search in PubMed and Web of Science databases. Studies reporting findings relating handedness (assessed as hand preference) and corpus-callosum morphology in healthy participants were considered eligible. On the basis of a total of k = 25 identified studies, random-effects meta-analyses were conducted considering four different group comparisons found in the literature. That is, studies comparing participants of (a) predominantly right- (dRH) and left-hand preference (dLH), (b) consistent right (cRH) and non-cRH preference, (c) cRH with mixed-hand preference (MH), and (d) cRH with consistent left-hand hand preference (cLH). For none of these meta-analyses did we find a significant effect of hand preference, and narrow confidence intervals suggest that the existence of substantial population effect sizes can be excluded. For example, considering the comparison of dRH and dLH, (summarizing k = 14 studies incorporating 1910 dRH and 646 dLH participants) the estimated mean effect size was g = 0.016 (95% confidence interval: -0.12 to 0.15). Thus, the common practice of assuming an increase in callosal connectivity based on hand preference is likely invalid.
... A recent series of ଏve studies with 2,314 student participants in Italian schools reported that the variance in mathematic scores explained by handedness was between 3-10%, although neither linear nor quadratic functions could capture this relationship suଏciently. Moreover, gender, age, and type of mathematical task inଏuenced the shape of this relationship (Sala, Signorelli, Barsuola, Bolognese, & Gobet, 2017). Corballis, Hattie, and Fletcher (2008) further showed that ambidextrous individuals show worse performance than left-or right-handers on the arithmetic subscales of the New Zealand IQ Test, using a sample of 1,353 adults aged from 18 to over 60 years of age from New Zealand. ...
Increased rates of atypical handedness are observed in neurotypical individuals who are low-performing in mathematical tasks as well as in individuals with special educational needs, such as dyslexia. This is the first investigation of handedness in individuals with Mathematical Learning Difficulties (MLD). We report three new studies (N = 134; N = 1,893; N = 153) and two sets of meta-analyses (22 studies; N = 3,667). No difference in atypical hand preference between MLD and Typically Achieving (TA) individuals was found when handedness was assessed with self-report questionnaires, but weak evidence of a difference was found when writing hand was the handedness criterion in Study 1 (p = .049). Similarly, when combining data meta-analytically, no hand preference differences were detected. We suggest that: (i) potential handedness effects require larger samples, (ii) direction of hand preference is not a sensitive enough measure of handedness in this context, or that (iii) increased rates of atypical hand preference are not associated with MLD. The latter scenario would suggest that handedness is specifically linked to language-related conditions rather than conditions related to cognitive abilities at large. Future studies need to consider hand skill and degree of hand preference in MLD.
... Interestingly, a few authors reported other variables such as gender and age as possible intervening factors in handedness (Sala et al., 2017). In this respect, Amunts et al. (2000) reported anatomical asymmetries between cerebral hemispheres for righthanded males, but not females. ...
