Within the last decade, the influence of focus of attention (FOA) instruction on postural control has been an increased interest among researchers (Yeh et al., 2016; McNevin et al., 2013). The general agreement when it comes to the role of FOA has been that adopting an external (EXT) FOA enhances the efficiency of motor programming by strengthening the relationship between movement planning and outcome, when compared to an internal (INT) FOA (see Wulf, 2013). However, increasing evidence suggests that the benefits from an EXT FOA can be mitigated by certain factors (e.g., age, skill level, novelty of the task and task complexity; Becker & Smith, 2013; Emanuel et al., 2008). As such, questions remain as to what form of FOA instruction is best suited for young learners, as FOA research has been criticized for being studied almost exclusively among adults (Agar et al., 2016). Research in this area is particularly sparse as it pertains to FOA in combination with postural control among this younger age group. This is particularly problematic as significant changes in postural control, stability and balance occur during one’s first decade in life (Haas, et al., 1989; Hay & Redon, 1999; Barela et al., 2003). Moreover, there exists some methodological concerns with regard to the lack of consistency of FOA instructions being used during experimentation. This directly influences where participants are guiding their attention and their interpretation of FOA cues (Davids, 2007; Petranek, et al., 2019). Further, the lack of replicability of traditional FOA studies and the increasing number of non-statistically significant findings in this research, calls into question the overall validity, both internal and external, regarding FOA instruction (Becker & Smith, 2013; Lawrence et al., 2011). Therefore, as a series of four complementary studies, the overall aim of this thesis is to further investigate these theoretical as well as procedural gaps. The first study examines which type of FOA instruction is best suited for two groups of young learners (typically developing children between 4-6 and 7-10 years of age) performing a postural control task. Participants will be randomized into either an INT, EXT or CTRL condition, where they will perform a postural control task with different respective visual displays. A force platform will be used to assess participants’ mediolateral centre of pressure (COP) performance, and electromyography (EMG) will be used to assess muscular activation of the participants’ major ankle stabilizers. The primary goal of study one is to investigate the influence of FOA in children by following the most common and traditional of FOA instruction. The second study serves as an extension for the first study. The aim of this study is to specifically investigate the validity and reliability of using FOA instructions, and whether or not the different attentional cues can drive their intended mental focus states. The method of this study is identical to those is Study 1 with a few major exceptions. In this case, two manipulation checks will be added to the procedure in order to assess how participants perceived, comprehended, and acted to their assigned FOA instructional condition. The first manipulation check is embedded in the structure of the trial itself: the comparison of postural control performance with and without visual information, modeled after the technique used in Yeh and colleagues (2016). The second manipulation check will be a retrospective verbal interview inspired by Perreault & French (2016). Finally, the third and fourth studies look to expand the research question from study one and two to different populations of atypically developing young learners who are known to struggle with both attention and postural control. Individuals with ADHD and individuals with DCD have been shown to interpret attentional and postural information differently when compared to age-matched controls. Therefore, the aim of these studies is to compare the differing effects of FOA across neurodiverse populations. Specifically, study three will use a group of young learners (from 4 – 10 years of age) with ADHD and study four will use a group of young learners (from 4 – 10 years of age) with DCD. The only differences in these studies compared to study one will be the lack of an age split and the use of EMG assessment. / Thesis / Master of Science in Kinesiology

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The diagnostic process of attention deficit hyperactivity disorder (ADHD) is complex and relies on criteria sensitive to subjective biases. This may cause significant delays in appropriate treatment initiation. An automated analysis relying on subjective and objective measures might not only simplify the diagnostic process and reduce the time to diagnosis, but also improve reproducibility. While recent machine learning studies have succeeded at distinguishing ADHD from healthy controls, the clinical process requires differentiating among other or multiple psychiatric conditions. We trained a linear support vector machine (SVM) classifier to detect participants with ADHD in a population showing a broad spectrum of psychiatric conditions using anonymized data from clinical records (N = 299 participants). We differentiated children and adolescents with ADHD from those not having the condition with an accuracy of 66.1%. SVM using single features showed slight differences between features and overlapping standard deviations of the achieved accuracies. An automated feature selection achieved the best performance using a combination 19 features. Real-world clinical data from medical records can be used to automatically identify individuals with ADHD among help-seeking individuals using machine learning. The relevant diagnostic information can be reduced using an automated feature selection without loss of performance. A broad combination of symptoms across different domains, rather than specific domains, seems to indicate an ADHD diagnosis.

This study investigates the effectiveness of an inquiry-based learning curriculum for middle school students with learning and/or attentional disabilities (LD and/or ADHD). The main questions asked were: To what extent can an inquiry-based learning curriculum focused on digital responsibility impact: (1) well-being; (2) smartphone usage; and (3) smartphone awareness among adolescents with LD and/or ADHD? Fifty middle school participants with LD and/or ADHD were divided into two groups, an experimental group and a control group. Findings showed a significant increase both in positive affect and in awareness of personal smartphone usage for experimental, but not control, participants, suggesting that inquiry-based learning may be an effective approach for teaching digital responsibility to students with LD and/or ADHD. Other findings indicated that social connectivity is a high priority for today's adolescents. Additional insights and implications are discussed.

Attention-deficit/hyperactivity disorder (ADHD) is a complicated psychiatric disorder that is typically first diagnosed in childhood and associated with negative outcomes in adulthood such as poor academic performance and difficulties with social relationships. ADHD can be difficult to accurately diagnose in adulthood, given the absence of clear, agreed upon ADHD symptomology in adults. In the current study, two raters used psychometrically sound instruments and diagnostically valid assessment techniques on an archival dataset to create three distinct groups: ADHD [2/3 with other mental health diagnosis (OMH)], OMH only, and no diagnosis. Findings support the value of comprehensive assessment, combined with a thorough evaluation of the material by a trained clinician, for the accurate diagnosis of ADHD for research purposes. Comparisons were made across groups to infer that college students with ADHD have lower grade point averages and academic self-concept than students without mental health diagnoses. Yet, contrary to much of the current literature, college students with ADHD seem to create as strong, deep, supportive and harmonious relationships with loved ones and close friends as their non-diagnosed peers. Clinicians working with college students with ADHD may use the results of the current study to better inform conceptualization, better recognize the innate resilience college students with ADHD likely have, and inform treatment interventions.

Attention deficit/hyperactivity disorder (ADHD) is frequently associated with negative occupational, social and psychological outcomes among community samples of adults; as such, it is expected that college students with ADHD face similar struggles. The research targeting this group of individuals, however, is sparse and tempered by significant limitations. The current study aimed to address methodological limitations in the current literature by including instruments to formally diagnosis ADHD and comorbid disorders, utilizing psychometrically sound instruments and comparing functioning of college students with ADHD across gender and subtype. It was hypothesized that participants with ADHD would report lower GPAs, higher levels of emotional distress and negative relationship characteristics than participants without ADHD. It was also hypothesized that participants with ADHD-combined type (ADHD-C) would report higher levels of substance and alcohol use than participants with ADHD-predominately inattentive type (ADHD-I), and that participants with ADHD-I would report higher levels of anxiety and depression than participants with ADHD-C. Women diagnosed with ADHD were expected to report higher levels of anxiety and depression than men diagnosed with ADHD; whereas, men diagnosed with ADHD were expected to report higher levels of substance and alcohol use than women. MANOVA, ANOVA and Mann-Whitney U tests were conducted to test hypotheses. Results revealed no significant differences between the ADHD and comparison group on GPA and relationship characteristics. Participants diagnosed with ADHD did report significantly higher emotional distress than participants in the comparison group. No differences in GPA or relationship characteristics were found across ADHD subtype or gender. Overall, these findings provide evidence to suggest that college students with ADHD are functioning relatively well compared to their non-ADHD peers.

Summaries in Afrikaans and English / ADHD is a well-known disorder affecting approximately 8% of children in South Africa. Despite years of research and development re the disorder, it seems that parents and teachers sometimes do not have the ability to handle a child with ADHD. Since a lot of the information is contradictory, confusion exists among parents and teachers who act as the support system of the child with ADHD. ADHD is a serious and destructive disorder and can influence the child’s social functioning negatively. Due to continuous failure, the child with ADHD has a low self-esteem. These aspects are the point of reference for the aim of this study, namely the development and implementation of a Gestalt therapeutic intervention plan aimed at the empowerment of the child with ADHD in the middle childhood years, his supporting systems and the evaluation of the impact thereof. The empirical data was gathered by a process of intervention research. A combination of the qualitative and quantitative approach was used. During the use of the qualitative method, a quasi-experimental one-group-pretest-posttest design was utilized. During the qualitative phase, the phenomenological perspective was used. An in-depth literature study was done in respect of ADHD, the theoretic basis of ADHD, the child with ADHD in the middle childhood years and the ADHD from a Gestalt therapeutic perspective. This literature study was the starting point for the development of the comprehensive holistic intervention plan. The intervention plan consists of three programmes: Firstly an empowering program of six sessions aimed at the child in the middle childhood years with ADHD – attention was given to emotional awareness and the dealing with unfinished business. Secondly an empowering programme aimed at the parents consisting of four parental guidance sessions, and thirdly an empowerment programme aimed at the teachers, consisting of two workshops. / AandagTekortHiperaktiwiteitsVersteuring (ATHV) is 'n welbekende versteuring wat ongeveer 8% van SuidAfrikaanse kinders be'invloed. Ten spyte van jarelange navorsing en die verbetering van begrip vir die versteuring, blyk dit dat ouers en onderwysers steeds nie altyd oor die vermoe beskik om 'n kind met A THV te hanteer nie. Aangesien daar baie teenstrydige inligting beskikbaar is, word verwarring geskep by ouers en onderwysers, wat as die kind met A THV se steunstelsels moet dien. A THV is 'n ernstige en verwoestende versteuring en kan die kind se maatskaplike funksionering negatief be'invloed. As gevolg van voortdurende mislukking het die kind met ATHV dikwels 'n lae selfwaarde. Hierdie aspekte het as uitgangspunt gedien vir die doel van die ondersoek, naamlik die ontwikkeling en implementering van 'n Gestaltterapeutiese intervensieplan gerig op die bemagtiging van sowel die kind met A THV in die middelkinderjare, asook sy steunstelsels, en om die impak daarvan te evalueer. Tydens die ondersoek is 'n proses van intervensienavorsing gevolg wat 'n gekombineerde kwalitatiewe en kwantitatiewe navorsingsmetode is. In die benutting van die kwalitatiewe metode is 'n kwasie-eksperimentele een-groep-voortoets-natoetsstrategie benut. By die kwalitatiewe metode is vanuit die fenomenologiese perspektief gewerk. 'n Diepgaande literatuurstudie is gedoen ten opsigte van ATHV, die teoretiese begronding van ATHV, die kind met ATHV in die middelkinderjare en ATHV vanuit 'n Gestaltterapieperspektief. Hierdie literatuurstudie het as basis vir die ontwikkeling van 'n omvattende holistiese intervensieplan gedien. Die intervensieplan bestaan uit drie programme. Eerstens 'n bemagtigingsprogram van ses sessies gerig op die kind met A THV in die middelkinderjare waar die klem geplaas is op emosionele bewuswording en die hantering van onvoltooidhede. Tweedens 'n bemagtigingsprogram gerig op die ouers tydens vier ouerleidingsessies. Derdens 'n bemagtigingsprogram gerig op die onderwysers bestaande uit twee werkwinkels. Gestaltterapie het nie slegs as teoretiese verwysingsraamwerk tydens die ondersoek gedien nie, maar Gestaltterapeutiesemetodes is ook benut tydens die implementering van die intervensieplan. Resultate vanuit die empiriese gegewens dui aan dat die ouers en onderwysers se kennis ten opsigte van ATHV verbeter het, want hulle het hanteringstrategiee aangeleer en begin toepas, en daar was beter begrip tussen die skool en die ouers waarby die kinders gebaat het. Die kinders se selfwaarde is ook verhoog en hulle maatskaplike funksionering het verbeter. / Social Work / D. Diac. (Play Therapy)