The development of the relationship between auditory and visual neural sensitivity and autonomic arousal from 6 m to 12 m

The differential sensitivity hypothesis argues that environmental sensitivity has the bivalent effect of predisposing individuals to both the risk-inducing and development-enhancing influences of early social environments. However, the hypothesis requires that this variation in environmental sensitivity be general across domains. In this study, we focused on neural sensitivity and autonomic arousal to test domain generality. Neural sensitivity can be assessed by correlating measures of perceptual sensitivity, as indexed by event-related potentials (ERP) in electrophysiology. The sensitivity of autonomic arousal can be tested via heart rate changes. Domain generality was tested by comparing associations in perceptual sensitivity across auditory and visual domains, and associations between sensitivity in sensory domains and heart rate. We contrasted ERP components in auditory (P3) and visual (P1, N290 and P4) detection-of-difference tasks for N = 68 infants longitudinally at 6 and 12 months of age. Domain generality should produce correlated individual differences in sensitivity across the two modalities, with higher levels of autonomic arousal associating with increased perceptual sensitivity. Having controlled for multiple comparisons, at 6 months of age, the difference in amplitude of the P3 component evoked in response to standard and deviant tones correlated with the difference in amplitude of the P1 N290 and P4 face-sensitive components evoked in response to fearful and neutral faces. However, this correlation was not found at 12 months of age. Similarly, autonomic arousal correlated with neural sensitivity at 6 months but not at 12 months. The results suggest bottom-up neural perceptual sensitivity is domain-general across auditory and visual domains and is related to autonomic arousal at 6 months but not at 12 months of age. We interpret the development of the association of these markers of ES within a neuroconstructivist framework and with respect to the concept of interactive specialisation. By 12 months of age, more experience of visual processing may have led to top-down endogenous attention mechanisms that process visual information in a way that no longer associates with automatic auditory perceptual sensitivity

Modelling the Developing Mind: From Structure to Change

This paper presents a theory of cognitive change. The theory assumes that the fundamental causes of cognitive change reside in the architecture of mind. Thus, the architecture of mind as specified by the theory is described first. It is assumed that the mind is a three-level universe involving (1) a processing system that constrains processing potentials, (2) a set of specialized capacity systems that guide understanding of different reality and knowledge domains, and (3) a hypecognitive system that monitors and controls the functioning of all other systems. The paper then specifies the types of change that may occur in cognitive development (changes within the levels of mind, changes in the relations between structures across levels, changes in the efficiency of a structure) and a series of general (e.g., metarepresentation) and more specific mechanisms (e.g., bridging, interweaving, and fusion) that bring the changes about. It is argued that different types of change require different mechanisms. Finally, a general model of the nature of cognitive development is offered. The relations between the theory proposed in the paper and other theories and research in cognitive development and cognitive neuroscience is discussed throughout the paper

Environmental Sensitivity: A Multi-Domain Investigation of its Development in Infancy

Highly sensitive individuals are thought to be disproportionately susceptible to both the risk engendering and development enhancing elements of their environment. If this is so, it seems necessary to hold that sensitivity is a unitary construct, in which markers of sensitivity to stimuli at neural, autonomic, and behavioural levels of analysis moderate the relationship between early social environments and outcomes, for better as well as for worse. The trait of environmental sensitivity (ES) is theorised, through conditional adaptation to enable resource exploitation or risk survival in the developmental context. This thesis tests four main hypotheses: that measures of ES at different levels of analysis would covary at 6-months and would be evoked by positive and negative stimuli; whether associations between measures at 6-months would endure by 12-months; that indices of sensitivity at 12-months would associate with measures indexing the quality of the developmental environment; that measures indexing ES would moderate the relationship between the environment and outcomes. Neural, autonomic, and behavioural indices of ES were measured in N82 infants at 6-months and 12-months, while concurrently collecting data on the wellbeing and socioeconomic status (SES) of their parents. Levels of infant self-regulation and sustained attention were assessed at 12-months. Associations between visual and auditory neural sensitivity were found at 6-months but not 12-months. Likewise, measures of positive and negative behavioural reactivity correlated at 6-months but not 12-months. Maternal SES moderated the relationship between negative reactivity at 6-months and positive reactivity at 12-months such that negatively reactive 6-months infants from high SES households were more positively reactive at 12-months. Baseline RSA at 6-months moderated the relationship between maternal anxiety and 12-months self-regulation but was marginally non-significant. The results are interpreted from the perspective of theories and concepts that have been integrated into a single overarching meta framework of Environmental Sensitivity

Systems in management 7th annual ANZSYS conference 2001: The relevance of systems thinking in the contemporary world

Welcome to Perth, Western Australia, and to the Systems in Management 7th Annual ANZSYS Conference 2001 the relevance of systems thinking in the contemporary world hosted by the We-B Centre, School of Management Information Systems at Edith Cowan University. The conference provides an opportunity for sharing and networking among academics and industry specialists in systems and related fields. The conference has drawn participants from national and international organizations. All submitted papers were subjected to an anonymous peer review process managed by the Conference Committee. Stringent review criteria resulted in an unprecedented number of papers declined this year. Based on these reviews, the final programme was determined. A total of 54 papers were submitted for consideration and 39 were accepted for presentation. The Conference Committee would like to recognise the efforts of many people who have contributed to the success and support in the organising of this conference and without their efforts the conference could not have occurred. The authors are thanked for their continued support to the Systems in Management 7th Annual ANZSYS Conference 2001 and we hope that the conference will receive similar support into the future. The reviewers deserve a special vote of thanks for their commitment and dedication in having their reviews conducted professionally. This year saw the launch of our Best Paper and Paper of Distinction award program. Papers nominated for this honour received particularly rigorous reviews. The winners will be announced at the conference. Thank you and enjoy the conference