M. Rosario Rueda

Development of attentional networks in childhood

Recent research in attention has involved three networks of anatomical areas that carry out the functions of orienting, alerting and executive control (including conflict monitoring). There have been extensive cognitive and neuroimaging studies of these networks in adults. We developed an integrated Attention Network Test (ANT) to measure the efficiency of the three networks with adults. We have now adapted this test to study the development of these networks during childhood. The test is a child-friendly version of the flanker task with alerting and orienting cues. We studied the development of the attentional networks in a cross-sectional experiment with four age groups ranging from 6 through 9 (Experiment 1). In a second experiment, we compared children (age 10 years) and adult performance in both child and adults versions of the ANT. Reaction time and accuracy improved at each age interval and positive values were found for the average efficiency of each of the networks. Alertness showed evidence of change up to and beyond age 10, while conflict scores appear stable after age seven and orienting scores do not change in the age range studied. A final experiment with forty 7-year-old children suggested that children like adults showed independence between the three networks under some conditions.

The Development of Executive Attention: Contributions to the Emergence of Self-Regulation

Over the past decade, developmental studies have established connections between executive attention, as studied in neurocognitive models, and effortful control, a temperament system supporting the emergence of self-regulation. Functions associated with the executive attention network overlap with the more general domain of executive function in childhood, which also includes working memory, planning, switching, and inhibitory control (Welch, 2001). Cognitive tasks used with adults to study executive attention can be adapted to children and used with questionnaires to trace the role of attention and effortful control in the development of self-regulation. In this article we focus on the monitoring and control functions of attention and discuss its contributions to self-regulation from cognitive, temperamental, and biological perspectives.

Developing Mechanisms of Temperamental Effortful Control

Studies of temperament from early childhood to adulthood have demonstrated inverse relationships between negative affectivity and effortful control. Effortful control is also positively related to the development of conscience and appears as a protective factor in the development of behavior disorders. In this study, the development of attentional mechanisms underlying effortful control was investigated in 2- to 3-year-old children, as indexed by their performance in a) making anticipatory eye movements to ambiguous locations and b) resolving conflict between location and identity in a spatial conflict task. The ability to make anticipatory eye movements to ambiguous locations within a sequence was clearly present at 24 months. By 30 months, children could also successfully perform a spatial conflict task that introduced conflict between identity and location, and at that age, childrens success on ambiguous anticipatory eye movements was related to lower interference from conflict in the spatial conflict task. Childrens performance on the eye-movement task was correlated with performance and reaction time on spatial tasks, and both were related to aspects of effortful control and negative affect as measured in childrens parent-reported temperament.

Developing Mechanisms of Self-Regulation in Early Life.

Children show increasing control of emotions and behavior during their early years. Our studies suggest a shift in control from the brain’s orienting network in infancy to the executive network by the age of 3—4 years. Our longitudinal study indicates that orienting influences both positive and negative affect, as measured by parent report in infancy. At 3—4 years of age, the dominant control of affect rests in a frontal brain network that involves the anterior cingulate gyrus. Connectivity of brain structures also changes from infancy to toddlerhood. Early connectivity of parietal and frontal areas is important in orienting; later connectivity involves midfrontal and anterior cingulate areas related to executive attention and self-regulation.

Development of the time course for processing conflict: an event-related potentials study with 4 year olds and adults

BackgroundTasks involving conflict are widely used to study executive attention. In the flanker task, a target stimulus is surrounded by distracting information that can be congruent or incongruent with the correct response. Developmental differences in the time course of brain activations involved in conflict processing were examined for 22 four year old children and 18 adults. Subjects performed a child-friendly flanker task while their brain activity was registered using a high-density electroencephalography system.ResultsGeneral differences were found in the amplitude and time course of event-related potentials (ERPs) between children and adults that are consistent with their differences in reaction time. In addition, the congruency of flankers affected both the amplitude and latency of some of the ERP components. These effects were delayed and sustained for longer periods of time in the children compared to the adults.ConclusionsThese differences constitute neural correlates of childrens greater difficulty in monitoring and resolving conflict in this and similar tasks.

Enhanced efficiency of the executive attention network after training in preschool children: immediate changes and effects after two months.

Executive attention is involved in the regulation of thoughts, emotions and responses. This function experiences major development during preschool years and is associated to a neural network involving the anterior cingulate cortex and prefrontal structures. Recently, there have been some attempts to improve attention and other executive functions through training. In the current study, a group of 5 years old children (n=37) were assigned to either a training-group who performed ten sessions of computerized training of attention or a non-trained control group. Assessment of performance in a range of tasks, targeting attention, intelligence and regulation of affect was carried out in three occasions: (1) before, (2) after, and (3) two months after completion of training. Also, brain function was examined with a high-density electroencephalogram system. Results demonstrate that trained children activate the executive attention network faster and more efficiently than untrained children, an effect that was still observed two months after without further training. Also, evidence of transfer of attention training to fluid intelligence and, to a lesser degree, to regulation of affect was observed. Results show that efficiency of the brain system underlying self-regulation can be enhanced by experience during development, providing opportunities for curricular improvement.

Contributions of Attentional Control to Socioemotional and Academic Development

Research Findings: Part of the attention system of the brain is involved in the control of thoughts, emotions, and behavior. As attentional control develops, children are more able to control cognition and responses flexibly and to adjust their behavior in social interactions better. In this article, we discuss evidence from different levels of analysis (e.g., temperamental, cognitive, and neural) indicating that attentional control plays a central role in several factors related to schooling, including socioemotional adjustment and academic achievement. Connecting behavioral and cognitive levels of analysis with the function of a particular brain network opens the possibility of exploring other factors that might influence the efficiency of this self-regulatory system. Moreover, understanding the processes and factors influencing the development of attentional control has the potential to help parents and teachers in their effort to promote schooling success. Practice or Policy: We also discuss recent efforts to develop educational interventions aimed at enhancing childrens attention skills.

The influence of temperament on the development of coping: The role of maturation and experience

Temperament refers to individual differences in two broad aspects of behavior: (1) emotional, motor, and attentional reactivity and (2) self-regulatory processes that modulate such reactivity. These individual differences are grounded in peoples constitution and influence both stress reactions and patterns of coping. In this chapter, we examine how individual differences in temperament are conceptually linked to the development of coping and how this association is modulated by the maturation of brain systems underlying temperament. Finally, we argue about the possibility of improving childrens coping abilities through intervention programs designed to foster self-regulation.

Behavioral and Brain Measures of Executive Attention and School Competence in Late Childhood

This study examines the role of executive attention on school competence in early adolescence. Twelve-year-old children (N = 37) performed a combined Flanker–Go/No-Go task while their brain activation was registered using electroencephalogram (EEG). Additionally, measures of children regulation, schooling skills, and academic achievement were obtained. We observed that individual differences in executive attention and Effortful Control predict most dimensions of school competence. Also, individual differences in the amplitude of event-related potentials (ERPs) related to interference suppression predict school achievement and some skills important for school. The results are consistent with the role attributed to executive attention in self-regulation.

Development of Attention Networks and Their Interactions in Childhood

In the present study, we investigated developmental trajectories of alerting, orienting, and executive attention networks and their interactions over childhood. Two cross-sectional experiments were conducted with different samples of 6- to 12-year-old children using modified versions of the attention network task (ANT). In Experiment 1 (N = 106), alerting and orienting cues were independently manipulated, thus allowing examination of interactions between these 2 networks, as well as between them and the executive attention network. In Experiment 2 (N = 159), additional changes were made to the task in order to foster exogenous orienting cues. Results from both studies consistently revealed separate developmental trajectories for each attention network. Children younger than 7 years exhibited stronger benefits from having an alerting auditory signal prior to the target presentation. Developmental changes in orienting were mostly observed on response accuracy between middle and late childhood, whereas executive attention showed increases in efficiency between 7 years and older ages, and further improvements in late childhood. Of importance, across both experiments, significant interactions between alerting and orienting, as well as between each of these and the executive attention network, were observed. Alerting cues led to speeding shifts of attention and enhancing orienting processes. Also, both alerting and orienting cues modulated the magnitude of the flanker interference effect. These findings inform current theoretical models of human attention and its development, characterizing for the first time, the age-related course of attention networks interactions that, present in adults, stem from further refinements over childhood.