"Hot" executive functions are comparable across monolingual and bilingual elementary school children: Results from a study with the Iowa Gambling Task.

Past research found performance differences between monolingual and bilingual children in the domain of executive functions (EF). Furthermore, recent studies have reported advantages in processing efficiency or mental effort in bilingual adults and children. These studies mostly focused on the investigation of "cold" EF tasks. Studies including measures of "hot" EF, i.e., tasks operating in an emotionally significant setting, are limited and hence results are inconclusive. In the present study, we extend previous research by investigating performance in a task of the "hot" EF domain by both behavioral data and mental effort via pupillary changes during task performance. Seventy-three monolingual and bilingual school children (mean age = 107.23 months, SD = 10.26) solved the Iowa Gambling Task in two different conditions. In the standard task, characterized by constant gains and occasional losses, children did not learn to improve their decision-making behavior. In a reversed task version, characterized by constant losses and occasional gains, both monolinguals and bilinguals learned to improve their decision-making behavior over the course of the task. In both versions of the task, children switched choices more often after losses than after gains. Bilinguals switched their choices less often than monolinguals in the reversed task, indicating a slightly more mature decision-making strategy. Mental effort did not differ between monolinguals and bilinguals. Conclusions of these findings for the bilingual advantage assumption will be discussed.

Executive functions in mono- and bilingual children: Factor structure and relations with fluid intelligence.

The effects of bilingualism on executive functions (EFs) and intelligence are still controversially discussed. Most studies have focused on performance differences without considering the underlying structure of cognitive abilities. Thus, we examined whether the structure of EFs and the relations of EFs with intelligence differ between mono- and bilingual children. A total of 240 elementary school children (mean age = 8 years 6 months; 133 monolinguals and 95 bilinguals) performed two tasks measuring working memory, inhibition, cognitive flexibility, and fluid intelligence, respectively. Confirmatory factor analyses showed that one common EF factor provided the best fit to the data in both language groups, indicating that bilingualism is not associated with differences in the EF structure at this age. Moreover, there were no latent performance differences in either EFs or intelligence between mono- and bilingual children. However, we found a stronger relation between a common EF factor and fluid intelligence in bilingual children as compared with monolingual children, implying a closer coupling of EFs and intelligence abilities in bilingual children. This contributes to explaining the previous heterogeneous findings on the task level because more closely coupled cognitive functioning can be slightly beneficial for some tasks and irrelevant or even slightly obstructive for others.

Age-differences in network models of self-regulation and executive control functions.

Self-regulation (SR) and executive control functions (EF) are broad theoretical concepts that subsume various cognitive abilities supporting the regulation of behavior, thoughts, and emotions. However, many of these concepts stem from different psychological disciplines relying on distinct methodologies, such as self-reports (common in SR research) and performance-based tasks (common in EF research). Despite the striking overlap between SR and EF on the theoretical level, recent evidence suggests that correlations between self-report measures and behavioral tasks can be difficult to observe. In our study, participants from a life-span sample (14-82 years) completed self-report measures and behavioral tasks, which were selected to include a variety of different facets of SR (e.g., sensation seeking, mindfulness, grit, or eating behavior) and EF (working memory, inhibition, shifting). Using this broad approach, we systematically investigated connections and overlap of different aspects of SR and EF to improve their conceptual understanding. By comparing network models of a youth, middle-aged, and older-aged group, we identified key variables that are well connected in the SR and EF construct space. In general, we found connections to be stronger within the clusters of SR and EF than between them. However, older adults demonstrated more connections between SR and EF than younger individuals, likely because of declining cognitive resources.

The relations between personality, components of executive functions, and intelligence in children and young adults.

Previous studies in adults showed heterogeneous results regarding the associations of personality with intelligence and executive functions (EF). In children, there is a lack of studies investigating the relations between personality and EF. Therefore, the aim of our study was to examine the relations between the Big Five personality traits, EF, and intelligence in a sample of children (Experiment 1) and young adults (Experiment 2). A total of 155 children (Experiment 1, mean age = 9.54 years) and 91 young adults (Experiment 2, mean age = 23.49 years) participated in the two studies. In both studies, participants performed tasks measuring working memory (WM), inhibitory control, cognitive flexibility, and fluid intelligence and completed a personality questionnaire. In Experiment 1, we found a negative relation between neuroticism and intelligence. In Experiment 2, we found a positive relation between conscientiousness and intelligence and a positive relation between conscientiousness and cognitive flexibility. Our results suggest a complex interplay between personality factors, EF, and intelligence both in children as well as in young adults.

Effects of game-based and standard executive control training on cognitive and academic abilities in elementary school children.

Several studies indicate that executive functions (EF), such as working memory (WM), inhibition or flexibility can be improved by training and that these training-related benefits in WM capacity generalize to reading and mathematical abilities. However, the results of these studies are inconsistent and most of them focused on WM training in children with learning difficulties. Evidence for typically developing children is rare and no study has investigated inhibition training or flexibility training. There is also a lack of studies taking motivational factors into account. Therefore, this study compared the effects of game-based and standard training regimens targeting WM, inhibition, or flexibility in children. One hundred and fifty-three typically developing elementary school students (mean age = 9.6 years, standard deviations  = 0.8) were investigated in an intervention design with a pretest, 21 sessions of training, a posttest and a follow-up after three months. They were randomized into one of six training groups or a control group. We found training gains in all training groups and higher self-reported motivation in the game-based as compared to the standard training groups. Furthermore, there was domain-specific transfer to untrained EF tasks across all training groups. We found greater performance improvements in reading ability (but not mathematics) in the game-based flexibility training group and the game-based inhibition training group as compared to the control group. Transfer effects were still significant at follow-up. In sum, our findings provide first evidence for a systematic comparison of training on different domains of EF and their differential effects on academic abilities.

Validation of new online game-based executive function tasks for children.

Numerous tasks are available to measure executive functions (EFs; working memory, inhibition, and flexibility) in children. However, they differ massively in the way they are presented and framed. Some contain child-friendly stimuli, feedback, or game elements likely to increase motivation and interest to perform the tasks, whereas others do not. Yet, it is unclear whether these apparent differences affect task performance. Therefore, the aim of our study was to develop and validate new game-based tasks assessing EFs in children. We designed three tasks for each dimension of EF and implemented them in a game version (based on the motivational framework proposed by Ryan and Deci (2000) and a standard version. The game-based tasks included elements designed to improve perceived competence (appealing feedback), autonomy (choosing how the protagonists proceed), and relatedness (a child-friendly cover story). To investigate whether adding these game elements influenced the motivation to engage in these tasks and task performance, 60 children (third and fourth graders) performed the game-based version and the standard version in two sessions (counterbalanced across participants). Because both the game-based and standard versions of the tasks should tap the same cognitive processes, we also tested whether performances in both versions were correlated. We found higher self-reported motivation in terms of interest, perceived competence, and relatedness after performing the game-based version as compared with the standard version. Performance on the game-based and standard versions of most of the tasks was significantly correlated, and there were no performance differences between the game-based and standard versions.