Precognition can be defined as an anomalous correlation between current cognitive activity and a future event. Using behavioural and physiological measures, a number of previous studies have reported evidence for unconscious precognition during a variety of task conditions. The current thesis presents five experiments that were designed to test for unconscious precognition in the visual attention system while participants were engaged in a short term visual memory task. Each trial consisted of a study and test phase. In the study phase, participants were required to memorise an array of four stimuli while their eye movements were recorded. After a brief retention interval, a probe stimulus was presented for a yes/no recognition test. Two conditions were employed and were randomly determined. In the old condition, the probe was a stimulus viewed during study, termed the target. In the new condition, the probe was a novel stimulus. Experiments tested for the presence of precognition by examining whether there was a difference in the degree to which visual attention was allocated to items during the study phase of old and new trials. Two further studies were also carried out involving simulations that aimed to establish the extent to which a previously described artefact, termed the expectation bias, may impact on the results. Experiment 1 suggested that participants spent more time attending to target stimuli in old compared to new trials, a result that appeared to provide evidence for precognition. However, the data was considered unreliable due to inadequate randomisation. An exact replication of Experiment 1 was carried out in Experiment 2 with adequate randomisation, but failed to find evidence for precognition. Experiment 3A was a further attempt to replicate the preliminary results of Experiment 1 using more extensive randomisation procedures while Experiment 3B explored the potential role of the probe stimulus in generating a precognitive effect. However, no support for the precognitive hypothesis was found in either experiment. A fully balanced design was employed in Experiment 4 in order to control for potential confounds such as position and saliency effects. The results supported the precognitive hypothesis and suggested that less attention was allocated to targets in the old condition. An exploratory analysis also examined the relationship between several standardised stimulus variables and the apparent precognitive effect observed in Experiment 4. The results revealed a suggestive relationship between the size of the effect and item ratings of familiarity and visual complexity. Simulations of an expectation bias in Experiments 5A and 5B together with post-hoc examination of the data from the current series of experiments suggest that this artefact is not a plausible explanation for the observed effects. The thesis ends with a discussion of several methodological issues that may impact on both the interpretation of positive results and the conclusions that may be reached from this body of data as a whole. Finally, suggestions for further work are made.

This thesis is a systematic investigation of preparatory reorienting of task-relevant spatial attention. Task switching experiments typically report a performance overhead when the current task is different to that performed on the previous trial relative to when the task repeats. This ‘switch cost’ tends to reduce as participants are given more time to prepare (consistent with an active reconfiguration process) but a ‘residual’ switch cost usually remains even at very long preparation intervals (often interpreted as evidence of carryover of response selection parameters from the previous trial which are immune to preparation). Although attentional selection of perceptual attributes is often considered to be part of task-set and is included in some models of task-set control, little research has investigated the dynamics of this component in detail. Over a series of seven experiments in which tasks were consistently mapped to screen locations, eye-tracking was used to systematically investigate task-relevant spatial selection of perceptual attributes during the preparation interval and early after stimulus onset. Experiment 1 revealed a switch-induced delay in appropriate attention orientation and a measure of ‘attentional inertia’ which could not be explained by task-independent re-orienting to locations or low-level oculomotor phenomena but were markers of task-relevant spatial selection. Experiment 2 provided a sensitive measure of both of these attentional handicaps and demonstrated that they both contribute to the switch cost (including its residual component). Although attentional inertia reduced with preparation, both handicaps were present at the longest preparation intervals. The constancy of the delay in attending to the relevant attribute reflects the effort to re-allocate attention, rather than peculiarities of spatial orienting when the cue and stimulus are presented near-simultaneously on trials with short cue-stimulus intervals. The presence of attentional inertia in blocks with long preparation intervals suggested some component of inertia immune to preparation (though see Experiments 5 and 6 below). Experiments 3 and 4 investigated the extent to which attentional selection can be decoupled from other task-set components. Cues which explicitly provided location information reduced (or eliminated) the attentional effects found in Experiment 2 indicating that attentional selection can be decoupled from other task-set components. However, Experiment 3 found that the ‘natural’ state is for attentional selection to be coupled at least to a degree (and accessed via) task-set. Experiment 5 combined eye-tracking with ERPs to investigate the relative order of attentional selection and reconfiguration of other task-set components. A well-documented ERP marker of task-set preparation always followed onset of the first fixation on the currently relevant stimulus element indicating that (at least some) task-set components are reconfigured in a serial order with spatial selection preceding other components (e.g., loading of S-R rules or other parameters into working memory). Experiments 6 and 7 investigated the nature of attentional inertia. In Experiment 6 participants were given ultimate control over the duration of the preparation interval which eliminated attentional inertia (at least as indexed by preferential fixation of the previously relevant element on switch trials). In Experiment 7 the stimulus comprised three items which were from perceptually distinct classes (digits, letters, objects) to investigate whether the presence of task-specific features would elicit extra attentional inertia and whether early spatial selection was effective enough to block the processing of task-irrelevant features once the stimulus was presented. Although there was some evidence that the previously relevant stimulus element ‘captured’ attention, this tendency was modest in the fixations and absent in performance measures (response congruence effects).

Past research has shown that the processing of emotional visual stimuli and visual attention are tightly linked together. In particular, emotional stimuli processing can modulate attention, and, reciprocally, the processing of emotional stimuli can be facilitated or inhibited by attentional processes. However, our understanding of these interactions is still limited, with much work remaining to be done to understand the characteristics of this reciprocal interaction and the different mechanisms that are at play. This thesis presents a series of experiments which use eye-tracking, behavioural and event-related potential (ERP) methods in order to better understand these interactions from a cognitive and neuroscientific point of view. First, the influence of emotional stimuli on eye movements, reflecting overt attention, was investigated. While it is known that the emotional gist of images attracts the eye (Calvo and Lang, 2004), little is known about the influence of emotional content on eye movements in more complex visual environments. Using eye-tracking methods, and by adapting a paradigm originally used to study the influence of semantic inconsistencies in scenes (Loftus and Mackworth, 1978), we found that participants spend more time fixating emotional than neutral targets embedded in visual scenes, but do not fixate them earlier. Emotional targets in scenes were therefore found to hold, but not to attract, the eye. This suggests that due to the complexity of the scenes and the limited processing resources available, the emotional information projected extra-foveally is not processed in such a way that it drives eye movements. Next, in order to better characterise the exogenous deployment of covert attention toward emotional stimuli, a sample of sub-clinically anxious individuals was studied. Anxiety is characterised by a reflexive attentional bias toward threatening stimuli. A dot-probe task (MacLeod et al., 1986) was designed to replicate and extend past findings of this attentional bias. In particular, the experiment was designed to test whether the bias was caused by faster reaction times to fear-congruent probes or slower reaction times to neutral-congruent probes. No attentional bias could be measured. A further analysis of the literature suggests that subliminal cue stimulus presentation, as used in our case, may not generate reliable attentional biases, unlike longer cue presentations. This would suggest that while emotional stimuli can be processed without awareness, further processing may be necessary to trigger reflexive attentional shifts in anxiety. Then the time-course of emotional stimulus processes and its modulation by attention was investigated. Modulations of the very early visual ERP C1 component by emotional stimuli (e.g. Pourtois et al., 2004; Stolarova et al., 2006), but also by visual attention (Kelly et al., 2008), were reported in the literature. A series of three experiments were performed, investigating the interactions between endogenous covert spatial attention and object-based attention with emotional stimuli processing in the C1 time window (50–100 ms). It was found that emotional stimuli modulated the C1 only when they were spatially attended and task-irrelevant. This suggests that whilst spatial attention gates emotional facial processing from the earliest stages, only incidental processing triggers a specific response before 100 ms. Additionally, the results suggest a very early modulation by feature-based attention which is independent from spatial attention. Finally, simulated and actual electroencephalographic data were used to show that modulations of early ERP and event-related field (ERF) components are highly dependent on the high-pass filter used in the pre-processing stage. A survey of the literature found that a large part of ERP/ERF reports (about 40%) use high-pass filters that may bias the results. More particularly, a large proportion of papers reporting very early modulations also use such filters. Consequently, a large part of the literature may need to be re-assessed. The work described in this thesis contributes to a better understanding of the links between emotional stimulus processing and attention at different levels. Using various experimental paradigms, this work confirms that emotional stimuli processing is not ‘automated’, but highly dependent on the focus of attention, even at the earlier stages of visual processing. Furthermore, the uncovered potential bias generated by filtering will help to improve the reliability and precision of research in the ERP/ERF field, and more particularly in studies looking at early effects.

No description available.

Human infants rely on social interactions to acquire culturally relevant knowledge about their environment. Aside from active participation (“first-party perspective”), infants encounter social interactions through third-party observation (“third-party perspective”). Despite the absence of own involvement, the mere observation of others’ interactions represents an essential source of social learning opportunities. The overarching aim of this dissertation was to deepen our understanding of the foundations of infants’ observational learning from third-party interactions. This was achieved by investigating (a) social attentional developments and motivational influences driving infants’ attention toward third-party interactions (Study 1 & 2), and (b) factors influencing infants’ attention and memory while observing third-party interactions (Study 3). Study 1 investigated how infants’ attentional orienting to third-party interactions develops in parallel with their active social attention behavior. In Experiment 1, 9.5- to 11-month-old infants looked longer than 7- to 8.5-month-olds at videos showing two adults engaging in a face-to-face interaction, when simultaneously presented with a non-interactive back-to-back scene showing the same people acting individually. Moreover, older infants showed higher social engagement (including joint attention) during parent-infant free play. Experiment 2 replicated this age-related increase in both measures and showed that it follows continuous trajectories from 7 to 13 months of age. These findings suggest that infants’ attentional orienting to others’ social interactions coincides with developments in their social attention behavior during own social interactions. Study 2 examined the incentive value of social interactions as a proximal driver of infants’ attentional orienting to third-party interactions. In a gaze-contingent associative learning task, two geometrical shape cues were repeatedly paired with two kinds of target videos showing either a dyadic face-to-face interaction or a non interactive back-to-back scene. We found that 13-monthold infants performed faster saccadic latencies and more predictive gaze shifts toward the cued target region during social interaction trials. This suggests that social interaction targets can serve as primary reinforcers in an associative learning task, supporting the view that infants find it intrinsically rewarding to observe others’ social interactions. Study 3 investigated infants’ object encoding in the context of observed social interactions. In Experiment 1, 9-month-old infants were presented with four types of videos showing one object and two adults. The scenarios varied regarding the eye contact between the adults (eye contact or no eye contact) and the adults’ object directed gaze (looking toward or away from the object). Infants showed increased object encoding, but only when seeing two adults looking at an object together, following mutual eye contact. We found an identical pattern of results in a matched first-party design during which 9-month-old infants were directly addressed by one single adult on screen (Experiment 2). Together, these findings suggest that the capacity to learn about novel objects by observing third-party interactions emerges in the first postnatal year, and that it may depend on similar factors as infants’ learning through direct social interactions at this age. The findings of all three studies are integrated in a general discussion. In summary, the results of this thesis suggest that, throughout the first year after birth, infants develop abilities and preferences enabling them to approach and efficiently learn from third-party social interactions.:General Introduction 1 1.1 The Infant As an Active Learner 2 1.2 Social Attentional Requirements of Infants’ Learning From Social Interactions 3 1.3 Motivational Mechanisms Affording Opportunities to Learn From Social Interactions 16 1.4 Infants’ Learning From Social Interactions 21 1.5 Research Gaps 26 1.6 Focus of This Dissertation 27 Study I 33 2.1 Introduction 34 2.2 Experiment I 38 2.3 Experiment II 45 2.4 General Discussion 50 Study II 55 3.1 Introduction 56 3.2 Methods 57 3.3 Results 63 3.4 Discussion 64 Study III 69 4.1 Introduction 70 4.2 Experiment I 74 4.3 Experiment II 81 4.4 General Discussion 86 General Discussion 91 5.1 Summary of Results 91 5.2 Research Contributions 93 5.3 Limitations and Future Directions 101 5.4 Overall Conclusion 114 References 115 Appendix A – Supplementary Materials Study I 137 Appendix B – Supplementary Materials Study II 148 Appendix C – Supplementary Materials Study III 152 Curriculum Vitae 167 Scientific Publications and Conference Contributions 169 Contributions of Authors 171 Declaration of Authorship 175

Aufmerksamkeit ist eine wichtige kognitive Operation, die mehrere Prozesse betrifft, zu welchen Konzentration, Orientierung, Filterung und Verarbeitung von Inputs, das Aufrechterhalten des Fokus und endogene Kontrolle gehören (Colombo, 2001; Hendry et al., 2019). Es wird angenommen, dass Aufmerksamkeit die Allokation von kognitiven Ressourcen, die Priorisierung und Aktualisierung eintreffender Informationen und die Regulierung von Verhalten in der frühkindlichen Entwicklung unterstützen kann (Colombo et al., 2011; Esterman & Rothlein, 2019). Die Fähigkeit zur Steuerung von Aufmerksamkeit in frühen Jahren wird häufig als entscheidend für die spätere Entwicklung von Selbstregulation angesehen (Posner et al., 2016; Rueda, Posner, et al., 2005), welche verbunden ist mit der akademischen Leistung und Lernleistung im späteren Leben (Best et al., 2011; Morgan et al., 2019). Beeinträchtigungen von Aufmerksamkeit und Selbstregulation sind oft mit neurologischen Entwicklungsstörungen verbunden, wie beispielsweise einer Aufmerksamkeitsdefizits- oder einer Hyperaktivitätsstörung (Barkley, 1997; Sjöwall et al., 2013; Sonuga-Barke et al., 2010) oder einer Autismus-Spektrum-Störung (Gilotty et al., 2002; Matson et al., 2013; Samson et al., 2014). Der Blick nach vorn – vom Säugling zum Kleinkind Die Entwicklungsliteratur verlässt sich zur Messung der Aufmerksamkeitssteuerung stark auf die Messung unterschiedlichen Blickverhaltens (Bornstein, 1985; Colombo et al., 1999; Gredebäck et al., 2009). Verschiedene Parameter des Blickverhaltens wurden verwendet, um unterschiedliche Aspekte der Aufmerksamkeitssteuerung zu erfassen, wie beispielsweise die Latenz der Ausrichtung zu Stimuli (Pyykkö et al., 2020), die Blickdauer auf Stimuli (Johansson et al., 2015) oder die Verarbeitungsgeschwindigkeit visueller Stimuli (Blankenship et al., 2019). Obwohl berichtet wurde, dass verschiedene Aspekte der Entwicklung der Aufmerksamkeitssteuerung über die ersten 2 Lebensjahre stabil sind (Brandes-Aitken et al., 2019; Colombo et al., 2004; Rose & Feldman, 1987; Rose et al., 2001), basieren die meisten Ergebnisse auf einem einzelnen und kurzen Beobachtungszeitraum (z. B. 5 Minuten). In dieser Arbeit wird eine datengetriebene Methodik eingesetzt, um einen longitudinalen Datensatz zu untersuchen, der Daten zum Blickverhalten im Alter von 6, 10 und 18 Monaten enthält. Auf diese Weise sind wir im Stande, Entwicklungsänderungen der Aufmerksamkeitssteuerung aus verschiedenen Perspektiven zu beobachten. Vor allem konnte auf diese Weise eine stabile und robuste Messgröße identifiziert und etabliert werden, die verwendet werden kann, um zu anderen Variablen in Bezug gesetzt zu werden, beispielsweise in der vorliegenden Arbeit zur Selbstregulation und zur mütterlichen psychischen Gesundheit. Aufmerksamkeit im Säuglingsalter wird oft als Frühindikator oder Prädiktor für Selbstregulationsfunktionen genutzt. Selbstregulationsfunktionen wiederum, häufig unter Betonung von Effortful Control und exekutiven Funktionen (Posner & Rothbart, 2000; Rothbart & Rueda, 2005; Rothbart, Sheese, et al., 2011), korreliert mit individuellen akademischen Leistungen, der Lebenszufriedenheit und dem Arbeitsmarkterfolg (Ahmed et al., 2019; Best et al., 2011; Brock et al., 2009; Morgan et al., 2019). Es wurde vorgeschlagen, dass Aufmerksamkeit grundlegend für die Entwicklung von Selbstregulationsfunktionen ist (Colombo & Cheatham, 2006; Posner & Rothbart, 2009; Rueda, Posner, et al., 2004). Auf dieser Basis haben mehrere jüngere Studien einen positiven Zusammenhang zwischen Aufmerksamkeit und Selbstregulation in den frühen Lebensjahren festgestellt (Blankenship et al., 2019; Cuevas & Bell, 2014; Geeraerts et al., 2019; Papageorgiou et al., 2014). In der vorliegenden Arbeit wurde die Literatur gesichtet, die diesen Zusammenhang aufstellt, und die Gesamtevidenz geprüft. Obwohl zwar empirische Hinweise darauf existieren, die diese Feststellung unterstützen, sind die Ergebnisse nicht konsistent. Des Weiteren werden basierend auf den gleichen Annahmen experimentelle Ergebnisse präsentiert, welche den Zusammenhang zwischen Messgrößen der Aufmerksamkeit im Säuglingsalter (auf Basis der datengetriebenen Methodik) und der Selbstregulationsfunktionen im Alter von 18 und 30 Monaten untersuchen. Die vorliegenden Resultate, ebenso wie der Literaturüberblick unterstützen die Behauptung eines Zusammenhangs zwischen Aufmerksamkeit und Selbstregulation nicht, zumindest nicht im Kleinkindalter. Der Blick zurück – vom Säugling zu Schwangerschaft und Kindheit der Mutter Vor dem Hintergrund der Wichtigkeit von Aufmerksamkeit im Säuglingsalter und der zuvor beschriebenen Rolle in der späteren Entwicklung haben Studien zu Säuglingsalter und Kindheit versucht, diejenigen Risikofaktoren zu identifizieren, welche die Aufmerksamkeitsentwicklung beeinträchtigen könnten. Dies legt den nachträglichen Fokus der Betrachtung auf die In-Utero-Periode und sogar Kindheitserfahrungen der Mutter. Es existieren substantielle Hinweise darauf, dass mütterliche Stressfaktoren kortikale und subkortikale Verknüpfungen von Säuglingen beeinflussen (Rifkin-Graboi et al., 2013; Scheinost et al., 2020) und negative Auswirkungen auf die kognitive Entwicklung von Kindern haben kann (Keim et al., 2011; Kingston et al., 2015; Laplante et al., 2004; Tarabulsy et al., 2014). Des Weiteren wurde in jüngeren Studien berichtet, dass negative mütterliche Kindheitserfahrungen einen kumulativen Effekt auf die mütterliche psychische Gesundheit haben kann (Sacchi et al., 2020; Weltz et al., 2016) und wiederum zu strukturellen Konsequenzen für die neuronale Entwicklung in-utero führen kann (Andescavage et al., 2017; Moog et al., 2018). Im Einklang mit diesen Ergebnissen haben mehrere umfangreiche Studien einen negativen Zusammenhang zwischen mütterlichem Stress und Kindheitstraumata, aufmerksamkeitsbezogenen Problemen (Ross et al., 2020; Wang & Dix, 2017), Aufmerksamkeitsdefizits-/Hyperaktivitätssymptomen (Moon et al., 2021; Mulraney et al., 2019; Vizzini et al., 2019) und einem erhöhten Autismusrisiko (Roberts et al., 2013) ihrer Kinder gezeigt. Obgleich eine umfangreiche Literatur zeigt, dass mütterlicher Stress die Aufmerksamkeit von Kindern beeinflusst, sind die zugrundeliegenden Mechanismen weiterhin unbekannt. In der vorliegenden Arbeit wurden die theoretischen Erklärungsansätze und die empirische Beweislage zum Zusammenhang von mütterlichen Stressfaktoren und Aufmerksamkeit des Nachwuchses untersucht. Im nächsten Schritt wurden, um ein besseres Verständnis für die zugrundeliegenden Mechanismen zu entwickeln, verschiedene Aspekte der mütterlichen psychischen Gesundheit (z. B. depressive Symptome, Symptome von Angstgefühlen und negative mütterliche Kindheitserfahrungen) und ihr Zusammenhang mit der Aufmerksamkeit von Säuglingen untersucht, basierend auf der gleichen Stichprobe anhand der Aufmerksamkeitsmessgrößen und unter Hinzufügen mütterlichen Daten von der Schwangerschaft bis 12 Monate nach der Geburt. Im Gesamten behandelt die vorliegende Arbeit drei Hauptthesen, welche in zwei verbundenen Veröffentlichungen untersucht werden. Erstens wurde die Entwicklung von Aufmerksamkeit im Alter von 6, 10 und 18 Monaten unter Verwendung von etwa 0,5 Millionen Fixierungen von Eye-Tracking-Messungen untersucht und mittels einer datengetriebenen Methode analysiert. Nach der Entwicklung von stabilen und robusten Aufmerksamkeitsmessgrößen, wurde das zweite Ziel umgesetzt, den Zusammenhang mit Selbstregulationsfunktionen zu untersuchen. Drittens wurde unter Verwendung der robusten Aufmerksamkeitsmessgrößen untersucht, ob rückblickend negative mütterliche Kindheitserfahrungen und mütterliche Stressfaktoren während der Schwangerschaft die Aufmerksamkeit von Säuglingen beeinflussen (Tu et al., 2021). Im Ergebnis zeigt sich (1) ein hoher Grad an Stabilität und interne Konsistenz zweier Aspekte der Aufmerksamkeitssteuerung von 6 bis 18 Monaten unter Verwendung einer datengetriebenen Methodik; (2) die Abwesenheit eines signifikanten Zusammenhangs zwischen Aufmerksamkeitssteuerung im Säuglingsalter und Selbstregulation im Kleinkindalter, welche eine weithin angenommene Verbindung zumindest im Kleinkindalter nicht bestätigt; und (3) einen signifikanten Einfluss von mütterlichen psychologischen Stressfaktoren, die in Verbindung zu negativen mütterlichen Kindheitserfahrungen stehen, auf die dauerhafte Aufmerksamkeit von Säuglingen. Zusammenfassend bietet die vorliegende Arbeit tiefere Einblicke in die Entwicklung von Aufmerksamkeit im Säuglingsalter und trägt zu einer wachsenden Literatur bei, die nahelegt, dass Prävention und Intervention sowohl für Mütter als auch für Säuglinge bereits vor der Schwangerschaft ansetzen sollten. Gleichzeitig zeigt die vorliegende Arbeit auf, dass das Forschungsfeld dringend weitere Untersuchungen zu den Entwicklungspfaden benötigen, die zu Selbstregulation führen. Dies unterstreicht die mehrstufige Natur von Entwicklungsprozessen. Zum jetzigen Zeitpunkt besteht nur wenig Evidenz, dass Aufmerksamkeit im frühen Säuglingsalter stark und auf besondere Weise mit Selbstregulation in der Kindheit in Zusammenhang stünde. Eine Theoriebasis und überprüfbare Modelle, die spezifisch für die Bewertung von früh entstehenden Grundlagen der Selbstregulation entwickelt werden, wären essenzielle Modelle, die der Komplexität der Aufgabe gerecht werden können.:1. Introduction p.7 1.1 Attentional Control in Infancy p.10 1.1.1 Development of Attentional Control in Infancy p.10 1.1.2 The Application of a Data-driven Method for Attention Measures Using Eye-tracking Data p.13 1.2 Attention and Self-regulatory Functions p.19 1.2.1 Distinct yet Approximate Aspects of Self-regulatory Functions in Early Years of Life p.19 1.2.2 The Relation between Attentional Control and Self-regulatory Functions p.20 1.3 Maternal Distress and Infants’ Attention p.26 1.3.1 Cross-generational Effects on Offspring’s Attention p.26 1.3.2 A Multi-dimensional Investigation of the Impact of Maternal Distress on Infants’ Attention p.27 2. Experimental Work p.33 2.1 Publication 1 – Experimental Work: Tu et al., (2022) p.35 2.2 Publication 2 – Experimental Work: Tu et al., (2021) p.51 3. General Discussion and Outlook p.67 3.1 Implications and Questions from the Experimental Work p.67 3.2 Optimizing the Design for Future Studies p.70 4. Summary p.73 3.1 English Summary p.73 3.2 Deutsche Zusammenfassung p.76 References p.80 Appendix p.96 A.1 Supplementary Information p.96 A.2 Author Contributions to the Publications p.97 A.3 Declaration of Authenticity p.99 A.4 Curriculum Vitae p.100 A.5 List of Publications p.102 A.6 Conference Contributions p.102 A.7 Acknowledgements p.103

Was wird zuerst verlagert und was folgt hinterher? Bei der Betrachtung der menschlichen Wahrnehmung spielen die Verlagerung des Orts der visuellen Aufmerksamkeit und die Verlagerung des Fixationsorts eine wichtige Rolle. Zur Reihenfolge, in der beide verlagert werden, existieren unterschiedliche Annahmen und Forschungsergebnisse, die vorgestellt werden. Es werden zwei zu dieser Thematik durchgeführte Experimente berichtet, in denen versucht wurde, vorliegende widersprüchliche Forschungsergebnisse zu integrieren. Es sollte gezeigt werden, dass neben der Aufmerksamkeit weitere Einflussgrößen existieren, die in Hinsicht auf diese Widersprüche Erklärungskraft besitzen. Mittels Bildbetrachtung und darauf folgender Wiedererkennensaufgaben wurde bestätigt, dass zu Beginn einer Fixation häufiger Ort und Inhalt der vorangegangenen Fixation angegeben werden. Dies wird nicht als ein Hinterherhinken der Aufmerksamkeit, sondern als Indiz für eine verzögerte Verarbeitung der Fixationsinhalte interpretiert. Im zweiten Experiment wurde zudem gezeigt, dass es kaum möglich ist, den Inhalt spezifischer vergangener Fixationen – hier konkret der vorletzten – gezielt zu erinnern.

This dissertation explores how children with and without developmental coordination disorder (DCD) ‘look’ and ‘see’: how they integrate vision and attention to guide arm and hand movements during a visuomotor task. Chapter 1 provides the thesis context, reviewing the vision and attention literature, outlining the role of these processes in motor performance, and reviewing what is known about vision and attention in children with DCD. Chapter 1 includes a discussion on eye tracking to measure visual attention, and outlines the thesis purpose and objectives.Chapter 2 focuses on children with DCD, detailing their presentation and clinical management. This chapter serves to increase the reader’s understanding of the difficulties children with DCD experience, and to demonstrate the need for intervention to prevent the profound consequences that can impact their quality of life. Chapter 3 presents a study that explores how children with and without DCD employ vision and attention to accomplish a visuomotor task in a natural setting, using a novel eye tracking design. Highlighted here are important differences during visuomotor task performance: compared to their peers, children with DCD did not use predictive gaze to attend to relevant task objects, but rather used vision to guide their arm/hand throughout the task. Chapter 4 outlines lessons learned from using an eye tracker with children with DCD, describing the children for whom eye tracking was not reliable, and discussing equipment and participant factors that impact eye tracker use. Recommendations for future research using eye tracking with the DCD population are provided. Finally, Chapter 5 discusses the clinical and research implications of the studies conducted here. Insights gained regarding visual attention differences between children with and without DCD are discussed in the context of interventions to improve health outcomes in children with DCD and the design of future eye tracking studies. / Dissertation / Doctor of Philosophy (PhD)

No description available.

The present work represents an endeavour towards the investigation of the linguistic-cognitive system under the lenses of classical questions in cognitive and language sciences, by using a multi-method and question oriented approach. The ambition is to move a step towards the investigation of the mutual contribution of perceptual and linguistic-mediated representations to the understanding of human behaviour. Chapter 1 will expose the theoretical framework and the goals this project was set to achieve: contributing to the theoretical reconcile of visual attention and language functions, from a developmental perspective. Chapter 2 will expose the possibility to rethink the linguistic function as penetrating human cognition in a top-down fashion, and specifically, its influence on template-guided search and disengagement of attention mechanisms. Concurrently, chapter 3 will expose the possibility to rethink the role of visual attention as a useful tool, necessary to the computation of meaning: attention will be introduced as a window to investigate the influence of language-mediated representation (spoken and written) on visuospatial mechanisms by means of ERPs and eye-tracking methodology. Finally, chapter 4 will report the rationale and the interpretation of seven original experimental investigations of the word (and sentence) effect on perceptual representation during visuospatial tasks, across infants and adults. The final discussion will try to reconcile the results of the presented studies with the theoretical and methodological issues raised in the first, second and third chapters in an integrated perspective of a linguistic-cognitive system.