Autism Spectrum Disorder (ASD) involves a broad presentation of symptoms classified along continuum of severity, with core deficits in Social Affect and Restricted, Repetitive Behaviours required for formal diagnosis (American Psychiatric Association, 2013; Lauritsen, 2013). The development of particular cognitive, behavioural and interpersonal difficulties seen in ASD is of great interest. Temperament offers particular value given that it influences the development of social behaviours, emotionality and self-regulation (Shiner et al., 2012). The self-regulatory temperament factor, effortful control, is known to be diminished in ASD (Garon et al., 2009, 2016) and is theorised to be related to attention and executive functioning (Rothbart & Rueda, 2005). This link is of particular interest, given that attention and executive function deficits are prominent in ASD (Craig et al., 2016; Lai et al., 2017; Sanders, Johnson, Garavan, Gill, & Gallagher, 2008). To date, however, a thorough literature search failed to yield a study which has investigated whether effortful control,attention and executive functioning are concurrently associated with ASD symptomatology.Moreover, the relationship between effortful control, attention and executive functioning is not as unambiguous as previously theorised in typical development, with little investigation into these relationships in ASD. To elucidate the association effortful control, attention and executive functioning have with ASD symptomatology, the relationship between effortful control and these cognitive variable needs to be better established empirically. Therefore the current investigation’s aims were twofold. Study One investigated the relationship of effortful control with attention and executive functions in neurotypical and ASD samples. Study Two explored the association between effortful control, attention, executive functions and core ASD deficits (i.e. Social Affect and Restricted, Repetitive Behaviours). A sample of 38 ASD and 38 neurotypical boys (aggregate-matched on key demographic factors), aged 6 - 15, and their primary caregivers were recruited. Study One considered both groups (n=76) and featured both quasi-experimental and relational investigations. Study Two focused only on the ASD sample (n=38) and used a purely relational design. Neurocognitive measures were used to assess two attention domains (i.e. attention span and sustained attention), and three executive functions (i.e. working memory, inhibition and switching). Effortful control was measured using a parent-report questionnaire and ASD core deficits were examined using the Autism Diagnostic Observation Schedule, Second edition (ADOS-2; Lord, Luyster, Gotham, & Guthrie, 2012). Results of Study One revealed effortful control was a significant predictor of attention span, working memory and inhibition, with ASD participants performing significantly more poorly on these cognitive domains and rated significantly more poorly on effortful control. Study Two’s results indicated that Social Affect was significantly correlated with inhibition and the interaction effect between effortful control and working memory. Furthermore, only effortful control, attention span and their interaction effect were significantly associated with Restricted Repetitive Behaviours. Specifically, effortful control was found to moderate this relationship. At high levels of effortful control, increased attention span was associated with less Restricted, Repetitive Behaviours. These findings may aid efforts to establish a predictive model for ASD core deficits on the basis of temperament and cognitive difficulties. Keywords: Autism Spectrum Disorder (ASD), Effortful Control, Attention, Executive Functions, Social Affect, Restricted Repetitive Behaviours

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Extant research suggests a link between child temperamental negativity and parental anxiety and depression. However, most studies focus on temperamental negativity generally, and over fairly short longitudinal time spans. The present study extended the time span well beyond immediate postnatal infancy and explored associations between specific child temperament dimensions, both positive and negative, and parental psychopathology. We expected positive relationships between temperamental negative affectivity and parental mental health problems, but an inverse relation involving temperamental effortful control. Data were collected on child temperament, and parental anxiety and depression, using a cross-sectional design and anonymous survey methodology across five child age groups: infancy (INF; 3 - 13 months, N ≅ 83), toddler (TOD; 14 - 36 months, N ≅ 94), early childhood (EC; 3 - 7 years, N ≅ 81), middle/late childhood (MLC; 8 - 10 years, N ≅ 31), and early adolescence (EA; 10 - 15 years, N ≅ 38). REDCap survey links were published on several dozen social media outlets and relevant listservs. Across all datasets, parental respondents primarily identified as white and female. Child gender distribution was approximately equal between girls and boys. We used the Rothbart family of instruments to assess temperamental negative affectivity and effortful control in each sample (i.e., IBQ-R Short Form, ECBQ Short Form, CBQ Short Form, TMCQ Standard Form, and EATQ-R Short Form, respectively). Parental anxiety was measured by the Generalized Anxiety Disorder Assessment (GAD-7), and parental depression was measured by the Patient Health Questionnaire-9 (PHQ-9). Associations involving child negative affectivity were generally consistent with expectations. Results indicated positive correlations between parental anxiety and child negative affectivity in 4 out of 5 groups (INF: r(83) = .25, p = .02; TOD: r(94) = .27, p = .01; EC: r(81) = .37, p < .001; EA: r(39) = .57, p < .001), and between parental depression and child negative affectivity in all age groups (INF: r(81) = .26, p = .02; TOD: r(91) = .22, p = .03; EAC: r(80) = .26, p = .02; MLC: r(30) = .42, p = .02; EAA: r(37) = .42, p = .01). Effortful control was negatively, but less robustly, correlated with parental anxiety (TOD: r(94) = -.22, p = .03; EAA: r(39) = -.44, p = .02) and depression (TOD: r(91) = -.29, p = .01; MLC: r(30) = .45, p = .01). Although we make no assumptions regarding directions of effect between child temperament and parental mental health, bidirectional influences seem likely. For example, parental mental health problems probably exacerbate temperamental negative affectivity, and temperamental negative affectivity probably exacerbates parental mental health problems. This study provides an important expansion of the timeframes of associations between parental mental health and child temperament.

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