The aim of the current study was to elucidate how emotion regulation strategies and metacognitive beliefs might impact executive functioning and academic achievement in children and adolescents through the mediation of trait anxiety. The examination of these variables was pertinent due to their closely intertwined interconnections. The initial model we had considered did not adequately explain the mechanisms through which emotion regulation strategies and metacognitive beliefs influenced the relationship between trait anxiety and executive functioning (refer to
supplementary material). Rather than further pursuing theoretical predictions with a singular model, we conducted a network analysis of our primary variables. This approach enhanced our understanding of the relationships and provided a robust and broader analysis. It revealed the centrality of trait anxiety in our study. Adolescents who report frequent and varied manifestations of anxiety in their daily lives are likely to struggle in mobilizing functional reflective processes, as represented by metacognitive beliefs and maladaptive emotion regulation strategies. This anxiety is also linked to problematic executive functioning in daily life as reported by parents. Lastly, academic performance was found to be negatively related to executive functioning and, to a lesser extent, emotion regulation strategies (ERSa). Indeed, ERSa emerged as the most distal, least influential, and least interconnected variable in our network. We discuss the implications of our research by revisiting the comprehensive analyses performed on each variable, comparing these findings to existing literature.
4.1. Anxiety
The various links between our variables and anxiety are generally consistent with the literature. Regarding executive functioning (EF), anxiety was found to be strongly and positively correlated with parent-reported executive functioning problems. While these findings might appear inconsistent with ACT, it is crucial to note that we did not assess executive functioning performance per se, but rather the behavioral manifestation of executive functioning. The additional cost associated with the use of compensatory strategies to adjust performance in tasks requiring renewed executive functioning in anxious adolescents directly affects their daily lives through their behaviors. Our results indirectly corroborate certain aspects of the ACT. However, we remain cautious as evaluations based on questionnaires and tasks are conceptually overlapping but provide two different levels of analysis (algorithmic vs. reflective) concerning information processing as per Stanovich [
17,
18]. Studies that combine these two levels of analysis could be beneficial to verify and refine the ACT. This was our aim in a recent study [
65]. Although we did not use mediation to explore the links between trait anxiety and academic success, our results suggest that trait anxiety plays a negative role in academic achievement, with EF also contributing. These findings align with those of Owens et al [
66], who demonstrated a relationship between trait anxiety and academic success mediated by working memory performance in a sample of 50 adolescents with an average age similar to our sample, see also [
67,
68]. However, these results do not align with those of Alfonso and Lonigan [
69]. In their study, trait anxiety was positively linked to EF performance and academic success, with working memory serving as the mediator between trait anxiety and academic outcomes. The authors noted that their sample exhibited low to moderate anxiety scores and that the negative effects of anxiety on performance are more pronounced when stimuli are associated with high threat. Nonetheless, our additional analyses indicated a linear, rather than curvilinear, relationship between anxiety and all our variables, suggesting that anxiety's impact on adolescent problematic behaviors does not vary with its intensity. As we propose, this discrepancy in results could be attributed to the measure of executive functions.
Regarding emotion regulation strategies (ERSs), maladaptive ERSs were predicted by trait anxiety in adolescents, except for the Blaming others strategy. This result is not surprising and has been found in other studies involving both adolescents and adults [
70]. This suggests that this strategy may not necessarily be maladaptive, at least in the short term, for reducing the unpleasant effect of an emotion. We note that this strategy is the only one among the other ERSs that seeks an external causality for emotional events. Although the relationship between adaptive ERSs and anxiety did not reach the threshold of significance, this finding is consistent with meta-analyses on the subject, which consistently show weaker associations between adaptive ERSs and anxiety [
26,
27,
28]. Sakakibara and Kitahara [
28] provide an interpretation by questioning the reliability of adaptive ERSs and highlighting their lack of conceptual clarity. They suggest revising the items to make them more capable of representing adaptive strategies in the face of unpleasant events. Another approach would be to adapt the questionnaire based on more recent theories by adding or removing strategies. For example, Garnefski et al. [
25] used a theoretical approach to create the Cognitive Emotion Regulation Questionnaire (CERQ). This approach involved building on existing tools by removing, transforming, or adding new strategies based on rationality. Therefore, updating the questionnaire is justified in order to enhance its validity and applicability. Incorporating research findings from the field to modify our way of representing, theorizing, or fundamentally conceptualizing emotion regulation in a virtuous cycle could be done by drawing on existing models in intervention sciences [
71]. Based on current evidence, emotion regulation strategies as assessed through the CERQ do not appear to be efficacious targets for intervention with the aim of diminishing anxiety levels, facilitating the adoption of functional behaviors in adolescents, or enhancing academic performance. In our study, we chose to analyze the influence of anxiety on ERS, while McLaughlin et al. [
31] found the opposite relationship using two separate measurement points. In their study, emotional expression and regulation problems predicted psychopathologies in adolescents, but not vice versa. However, their measures of emotional dysregulation partially differ from our focus on the use of cognitive and conscious strategies to regulate unpleasant emotions. Their questionnaires primarily assessed the understanding of emotions, regulation of specific emotions (anger and sadness) from a behavioral perspective, and one maladaptive ERS: rumination. Therefore, caution must be exercised in directly applying their conclusions to our study. Consistent with the ACT model, we believe that the development of cognitive strategies in response to unpleasant emotions depends on one's state, situation, and psychological traits. Numerous studies have shown that trait anxiety leads to major cognitive biases that make it difficult to disengage attention from threatening information, e.g., [
72]. The cognitive functioning of an anxious person can differ significantly from that of a non-anxious person, e.g., [
73,
74], suggesting an influence of anxiety on the development of specific strategies.
This indicates that the alignment between a person's feelings (anxiety) and their actions (ERS) in response to unpleasant emotions is not always complete and difficult to superimpose in a single model. As Borkovec [
73] suggested, "The reasons an individual generates to explain his or her behavior are often post hoc and unrelated to true causative relationships. But they do provide a view of how chronic worriers and GAD clients perceive their worrying, [...]" (p. 17). In other words, there is a mismatch between one's feelings (anxiety) and the way they act upon them (ERS), as the former is based on concrete evidence while the latter attempts to explain the nature of thoughts driving regulation strategies.
Regarding the MCQ, the total scale and the subscales of Negative Metacognitive Beliefs (MCneg), Confidence, and Control all predicted anxiety. However, MCneg were significantly more strongly associated with anxiety than the other subscales and the total scale. In contrast, Positive Metacognitive Beliefs (MCpos) and the Consciousness scale did not predict anxiety. These findings may initially seem surprising. However, MCpos and the Consciousness scale consistently show weaker effects on anxiety compared to the other subscales [
75,
76,
77], and may even be absent in certain clinical populations [
78]. Conversely, MCneg are more consistently linked to various symptoms, including anxiety, in both clinical and non-clinical populations [
45,
79,
80]. This is consistent with the S-REF model, which highlights the central role of beliefs about uncontrollability and the danger of worry thoughts in maintaining or exacerbating psychological difficulties [
43]. Similar results were found in a non-clinical population of 214 French-speaking Swiss adolescents with an average age of 15 years for negative metacognitive beliefs. This study found no influence of the Consciousness variable on anxiety, and the effect of the Lack of Confidence variable became marginally significant (p = .076) in a stepwise regression. Finally, MCpos were implicated in anxiety. The analysis was based on a version of the MCQ with 27 items, as three items were found to be inconsistent (items 2, 12, and 14), and four items were included in multiple subscales (items 3, 9, 11, and 23). This version of the scale likely needs refinement by rephrasing these items to improve robustness and reliability. A recent meta-analysis examining healthy adults and adults with psychopathology showed reliable combined effects for all four scales of the MCQ, but the subscale of MCpos was found to be unstable or non-significant [
81]. Benedetto et al. [
76] proposed that MCpos could be considered an adaptive coping strategy. Our study specifically examined the correlations between ERS and the MCQ. The correlations of all MCQ scales were positive and significant with maladaptive strategies. They were stronger for negative beliefs and the need for Thought Control. Positive beliefs are not adaptive, contrary to what Benedetto et al. [
76] suggested. Furthermore, the Consciousness scale was also correlated with adaptive strategies, but negatively. This has been observed in healthy subjects [
82]. In other words, being conscious of one's thoughts may be a determining factor in choosing to use an adaptive or maladaptive ERSs. This observation reinforces the specificity of the CERQ in measuring conscious cognitive processes, i.e., explicit ERS [
25]. These findings are important to consider when using the MCQ to interpret results in future studies with healthy samples. We hypothesize that the Consciousness subscale might mitigate the outcomes of studies employing the full range of subscales of the MCQ, potentially leading to an increased incidence of Type II errors. Like Sica et al. [
82], we believe that rephrasing items in this scale to highlight a more negative aspect of excessive and rigid consciousness could make the questionnaire more discriminating. This confluence of evidence substantiates the rationale for omitting this subscale from our correlation analysis and subsequent network analysis.
4.2. Executive functioning
Our results allowed us to establish a strong link between EF and academic achievement. Poor executive functioning reported by parents can be a good predictor of an adolescent's academic success. These findings are consistent with those of Ten Eycke and Dewey [
14], who, like us, used the parent version of the BRIEF. They observed correlations between the GEC and standardized tests of reading and mathematics. Samuels et al. [
83] also demonstrated strong correlations in a 4-year longitudinal study of adolescents aged 12 to 15 years, between various school subjects (science, language, mathematics, social studies, etc.) and the GEC. The fundamental difference is that the assessment of problematic behaviors was conducted by teachers or teacher assistants, not parents. Their correlations were much higher than ours. The lowest correlation was -0.40 (average correlation between teacher and teacher assistant), and the highest was -0.54, whereas it was -0.35 for our study. Several reasons can explain this difference. Samuels et al. [
83] conducted their correlations across multiple subjects, whereas we used the students' overall average. It is likely that subjects such as physical education may not necessarily be related to the GEC or may even have a negative relationship (beneficial for behaviors). Furthermore, teachers report on adolescents' behaviors in the classroom, not at home. This assessment is therefore closer to the school reality and more likely to reflect executive functioning relevant to learning rather than family life. Although weaker, our results suggest that the BRIEF can be considered a relevant tool for assessing EF in the school environment, whether used by teachers or parents. For a French population, Fournet et al. [
56] demonstrated that the BRIEF exhibited greater reliability in its parent-report version compared to the teacher-report version.
Overall, maladaptive emotion regulation strategies (ERSs) were more strongly related to all our variables than adaptive ERS. They predicted anxiety more strongly, were associated with problematic executive functioning, and also had closer links with metacognitive beliefs than adaptive ERSs. On one hand, these results expand on those of Lantrip et al. [
32] to other ERSs in a similar population and using the same scale for EF assessment (BRIEF). Indeed, they used the Emotion Regulation Questionnaire, which only assesses reappraisal for adaptive ERSs and behavioral suppression for maladaptive ERSs. The CERQ did not allow us to assess behavioral suppression, but dramatization, rumination, and self-blame were positively correlated with EF. However, although the relationship was also positive, maladaptive ERSs of blaming others was not correlated with EF. This finding aligns with the lack of predictive value of anxiety for this subscale and underscores the centrality of anxiety within our network analysis. Furthermore, several adaptive ERSs, such as putting things into perspective, acceptance, and focusing on action, were negatively correlated with problematic EF. On the other hand, these results contradict those of Lantrip et al. [
32] regarding reappraisal, as there was no correlation. One argument could have been that the two types of reappraisal differ conceptually, but strong correlations were found in studies with young adults in American, r = .59 [
84], and Italian samples, r = .409 [
85]. The differences are likely due to characteristics of our sample compared to their study and to the reflective aspect of the ERS. Our sample size is substantial, and the data have proven to be reliable, which supports the perspective that ERSa as assessed in the CERQ, when viewed from a reflective standpoint, are of limited interest for intervention.
4.3. Limitations and Future Directions
One limitation of our study concerns the characteristics of our sample, which may influence the strategies used to regulate emotions, the level of anxiety, and parents' evaluation of executive functioning. For example, it would be important to have information on the parents' socioeconomic status as it could directly impact the adolescents' living conditions. However, the overall academic averages of our sample were high with a moderate standard deviation. This suggests that the parents' socioeconomic status was good, as several meta-analyses [
86,
87] have found significant correlations between socioeconomic status and students' academic performance. A parallel study conducted in one of the middle schools that contributed significantly to our sample suggests a high socioeconomic status, predominantly characterized by parents in executive or skilled employee positions [
88]. Despite this, the lack of such data could have occasionally explained certain behaviors, anxiety levels, strategies employed, problematic behaviors, etc. Indeed, Schäfer et al. [
26] suggest that parental support in emotion regulation should play an essential role in a child's development and provide them with the means to adapt more serenely to daily life. Furthermore, adaptive strategies require a certain cognitive maturity that may be more easily stimulated depending on the parenting style.
Another potential limitation is that, given that we used questionnaires, it is always challenging to draw definite conclusions about the measured concepts and how each question may have been understood and interpreted by adolescents. We attempted to limit biases by assessing the comprehensibility of the questionnaires and reformulating certain questions (CERQ and MCQ). Although this reformulation remained very close to the original question's meaning, it is possible that it had an impact on the consistency of the questionnaires or certain scales. As previously highlighted, the CERQ is a questionnaire that focuses on a limited number of strategies that are not all of the same nature. For example, internal or external causality varies for maladaptive ERS such as self-blame and blaming others, which can make the scale less consistent. Nevertheless, this questionnaire remains valuable in providing insights into an adolescent's cognitive style and enabling the development of appropriate interventions in schools or psychological settings. We suggest drawing on more recent work to modify and improve this scale, such as the studies by McRae and Gross [
89] and the five families of ERS. To address these biases, the evaluation of children's behavior by parents and the participant's school average provided new perspectives and additional sources of information on students' behavioral reality to increase objectivity in our data. The fact that our data converged, for example, the self-reported anxiety of participants was correlated with both the average and the executive functioning reported by parents, is reassuring regarding the internal validity of our study. These converging data also explain why our correlations rarely exceeded the .50 threshold.
This study identified the involvement of ERS and metacognitive beliefs in students' predispositions to experience anxiety, which has a direct and indirect impact on their executive functioning and academic success. Targeted interventions focusing on metacognitive beliefs and ERS could be beneficial for both the well-being and success of adolescents. Mindfulness and Acceptance and Commitment Therapies are ideal candidates as they have shown promising effects on emotion regulation, executive functions, and anxiety [
90,
91,
92]. However, prior to implementation, the acceptability of such interventions should be evaluated in a large population to enhance adherence to these programs and further enhance their beneficial effects.