Individual differences in infant visual attention: links to child temperament, behaviour and genetic variation

Individual differences in infants’ visual attention have been associated with individual variation in cognition in childhood. However, it has not been explored the degree to which individual variation in newborn and infant visual attention relates to individual differences in some forms of temperament and behaviour in childhood. Furthermore, little is known about the genetic causes of individual differences on newborn and infant visual attention. Chapter 1 will review studies on individual differences in infant visual attention. Chapter 2 will review all genetic studies on infant attention, temperament and behaviour. Chapter 3 will present results of a study that explored the degree to which individual differences in infant mean fixation duration (mean age = 7.69 months) are associated with some forms of temperament and behaviour in childhood (sample mean age = 41.59 months). It was found that infant mean fixation duration predicted positively child effortful control and negatively surgency and hyperactivity-inattention. Chapter 4 will present a study that explored whether individual differences in newborn average dwell time (mean age = 2.20 days) are associated with some forms of temperament and behaviour in childhood (mean age = 90.00 months). Newborn mean dwell time predicted negatively child surgency and behavioural difficulties. Chapters 5 will present analyses that explore the degree to which genome-wide variants previously found to increase the liability for ADHD and schizophrenia are associated with infant mean fixation duration and newborn average dwell time. Τhe findings suggest that individual differences in infant visual attention are linked to attentional and behavioural control in childhood. Results are presented on the genetic mechanisms underlying individual differences in infant attention. Chapter 6 will evaluate critically the findings and will present limitations of this work to inform future studies

Individual differences in infant fixation duration relate to attention and behavioral control in childhood

Individual differences in fixation duration are considered a reliable measure of attentional control in adults. However, the degree to which individual differences in fixation duration in infancy (0–12 months) relate to temperament and behavior in childhood is largely unknown. In the present study, data were examined from 120 infants (mean age = 7.69 months, SD = 1.90) who previously participated in an eye-tracking study. At follow-up, parents completed age-appropriate questionnaires about their child’s temperament and behavior (mean age of children = 41.59 months, SD = 9.83). Mean fixation duration in infancy was positively associated with effortful control (β = 0.20, R2 = .02, p = .04) and negatively with surgency (β = −0.37, R2 = .07, p = .003) and hyperactivity-inattention (β = −0.35, R2 = .06, p = .005) in childhood. These findings suggest that individual differences in mean fixation duration in infancy are linked to attentional and behavioral control in childhood

Beyond good and evil: Exploring the mediating role of mental toughness on the Dark Triad of personality traits

The Dark Triad (DT) involves three closely related personality traits: narcissism, psychopathy and Machiavellianism. Mental toughness (MT) is a multi-facet trait that entails positive psychological resources, which are important across a range of achievement contexts. Research that examined the association between MT and the DT returned mixed findings. The present study aimed at: (1) exploring the association between MT and the DT using a considerable larger sample in comparison to previous studies; (2) investigating whether MT mediates the association between narcissism with psychopathy and Machiavellianism. The mediation model revealed that narcissism exerts significant negative indirect effects on both psychopathy and Machiavellianism, through MT. The implications of these findings for reducing socially undesirable outcomes, often linked to the DT, are discussed

Grandiose narcissism associates with higher cognitive performance under stress through more efficient attention distribution: an eye-tracking study

Narcissism is a part of the Dark Triad that consists also of the traits of Machiavellianism and psychopathy. Two main types of narcissism exist: grandiose and vulnerable narcissism. Being a Dark Triad trait, narcissism is typically associated with negative outcomes. However, recent research suggests that at least the grandiose type may be linked (directly or indirectly) to positive outcomes including lower levels of psychopathology, higher school grades in adolescents, deeper and more strategic learning in university students and higher cognitive performance in experimental settings. The current pre-registered, quasi-experimental study implemented eye-tracking to assess whether grandiose narcissism indirectly predicts cognitive performance through wider distribution of attention on the Raven’s Progressive Matrices task. Fifty-four adults completed measures of the Dark Triad, self-esteem and psychopathology. Eight months to one year later, participants completed the Raven’s, while their eye-movements were monitored during high stress conditions. When controlling for previous levels of psychopathology, grandiose narcissism predicted higher Raven’s scores indirectly, through increased variability in the number of fixations across trials. These findings suggest that grandiose narcissism predicts higher cognitive performance, at least in experimental settings, and call for further research to understand the implications of this seemingly dark trait for performance across various settings

The bright side of dark: exploring the positive effect of grandiose narcissism on perceived stress through mental toughness

Previous research reported that Subclinical Narcissism (SN) may increase Mental Toughness (MT) resulting in positive outcomes such as lower psychopathy, higher school grades and lower symptoms of depression. We conducted three studies (N = 364, 240 and 144 for studies 1, 2 and 3, respectively) to test a mediation model, which suggests that SN may increase MT predicting lower Perceived Stress (PS). The participants were drawn from the general population in studies 1 and 2; and were undergraduate students in study 3. SN exerted a negative indirect effect on PS, through MT across all three studies: β = -.26, SE = .039, 95% CI [-.338, -.187]); β = -.25, SE = .050, 95% CI [-.358, -.160]); β = -.31, SE = .078, 95% CI [-.473, -.168]). The results were replicated in the combined dataset. In study 3, we extended the sensitivity of the model showing that, it is the Grandiose SN that decreases PS, through MT; Vulnerable SN exhibited the reverse pattern. The findings indicate that the model, from SN to MT, may predict positive outcomes in various domains (e.g. in education and psychopathology) suggesting that inclusion of SN in the dark triad of personality may need to be reconsidered

Individual differences in mental toughness associate with academic performance and income

Mental toughness (MT) has been related to high performance in competitive situations. The current studies tested whether individual differences in MT were associated with success in two achievement domains: higher education and work. Academic performance and attendance were assessed over three years in a British university sample. MT was associated with higher average academic grades (Study 1). Individual differences in MT predicted individuals' income, controlling for age and gender (Study 2). The results suggest that MT entails positive psychological resources that are important for academic and career success. Future research aiming at exploring the factors that contribute to variation in MT and the mechanisms that underlie the association between MT and achievement may have significant implications for predicting and optimizing performance in various domains

The Relationship Between Mental Toughness, Job Loss, and Mental Health Issues During the COVID-19 Pandemic

Concerns toward public well-being and mental health are increasing considering the COVID-19 pandemic's global societal and individual impact. The present study builds on the current body of COVID-19 literature by examining the role of mental toughness (MT) in predicting negative affective states (depression, anxiety and stress) during the pandemic. The study also examined the effects of changes in employment on mental health and MT. Participants (N = 723) completed a battery of questionnaires including the Mental Toughness Questionnaire 48-item, The State-Trait Anxiety Inventory, and the Depression, Anxiety and Stress Scale – 21 items. Participants reported relatively higher levels of depression, stress and anxiety in comparison to pre-COVID-19 samples from previous research, with respondents who had lost their jobs during the pandemic reporting higher levels of negative affective states. Despite this, mentally tough individuals appeared to report lower levels of depression, anxiety and stress. Moreover, moderation analyses identified some interaction between MT and employment status when predicting depression, anxiety and stress. Our findings suggest that MT may have some utility in reducing the adverse mental health effects of the pandemic on individuals, however, further longitudinal research is needed to support these implications

Grandiose narcissism indirectly associates with lower psychopathology across five Countries

Using five independent non-clinical cross-cultural samples (total N = 3649; overall Mage = 29.31; 31% male and 69% female), this study explored the extent to which Dark Triad traits were indirectly associated with symptoms of psychopathology through mental toughness. Although Machiavellianism and psychopathy have not been studied extensively in this context, previous research (both cross-sectional and longitudinal) reports that grandiose narcissism increases mental toughness contributing indirectly to positive outcomes such as lower anxiety, stress, and depression. Accordingly, this study examined Machiavellianism, psychopathy, and narcissism in the context of mental toughness and psychopathology. A particular focus was placed on investigating negative relationships between grandiose narcissism and psychopathology. Participants completed self-report measures assessing the Dark Triad, mental toughness, and psychopathology. In all samples, grandiose narcissism exerted moderate negative, indirect associations with anxiety, stress, and depression through mental toughness. Relationships between Machiavellianism and psychopathy and psychopathology were generally weak and positive but varied across countries. Findings provided further cross-cultural support for a mediation model in which grandiose narcissism is related to higher mental toughness and lower psychopathology. Outcomes from this study indicate that exploration of the link between grandiose narcissism and resilience traits such as mental toughness can provide important conceptual insights into the adaptive properties of narcissism, and help to explain why grandiose narcissism is associated with a decrease in some psychopathological symptoms

Sex Differences in Non-Verbal and Verbal Abilities in Childhood and Adolescence

Twin research has shown that females with male co-twins perform better than females with female co-twins on mental rotation. This beneficial effect of having a male sibling on spatial ability could be due to in-uterine transmission of testosterone from males to females (the Twin Testosterone Transfer hypothesis, TTT). The present study explored sex differences and the TTT in non-verbal and verbal abilities in a large sample of twins assessed longitudinally at 2, 3, 4, 7, 9, 10, 12, 14 and 16 years of age. Females scored significantly higher than males on both verbal and non-verbal abilities at ages 2, 3 and 4. Males scored significantly higher than females on verbal ability at ages 10 and 12. The effect sizes of all differences were very small. No sex differences in non-verbal or verbal abilities were found at 7, 9, 14 and 16 years of age. No support for the TTT was found at any age. The findings indicate that the twin testosterone transfer effect occurs only for specific cognitive abilities, such as mental rotation