Loneliness becomes more prevalent as youth transition from childhood into adolescence. A key underlying process may be the puberty-related increase in biological stress reactivity, which can alter social behavior and elicit conflict or social withdrawal (fight-or-flight behaviors) in some youth, but increase prosocial (tend-and-befriend) responses…

It is well documented that implementing biosecurity on an animal farm is beneficial to the animal's health and wellness and in reducing the risk of production losses caused by diseases. However, compliance of biosecurity protocols has been shown to be low, and a lack of training has been blamed. A preliminary Systems Thinking model is presented to…

Definitions of disability are changing, shifting from a narrow medical diagnosis to a biopsychosocial model of disability, where disability is conceptualised as a series of relational conditions that can potentially disadvantage individuals within environments. Implications of this new understanding of disability will have significant effects in…

Purpose: Considerable research has shown adverse neurobiological effects of chronic alcohol use, including long-term and potentially permanent changes in the structure and function of the brain; however, much less is known about the neurobiological consequences of chronic smoking, as it has largely been ignored until recently. In this article, we…

This paper aims to describe, compare and discuss the theoretical models proposed by Patricia Greenfield, Çigdem Kagitçibasi and Heidi Keller. Their models have the common goal of understanding the developmental trajectories of self based on dimensions of autonomy and relatedness that are structured according to specific cultural and environmental…

While theories of adult learning and motivation are often framed as being either biological, psychological, or sociocultural, they represent a more complex, integral process. To gain a more holistic perspective of this process, a study was designed to concurrently investigate relationships between a biological factor (age), psychological factors…

Background: In order to design appropriate environments for performance and learning of movement skills, physical educators need a sound theoretical model of the learner and of processes of learning. In physical education, this type of modelling informs the organisation of learning environments and effective and efficient use of practice time. An…

The ontogeny of self-injurious behaviour exhibited by young children with developmental delays or disabilities is due to a complex interaction between neurobiological and environmental variables. In this manuscript, the literature on emerging self-injury in the developmental disability population is reviewed with a focus on an operant conceptual…

Describes results of several studies of the neurochemical determinants of inspection time (IT), outlining the significance of several studies in which performance on the IT task is measured before and after modulating key human central nervous system neurotransmitters and receptor systems. Results of these studies suggest a primarily cholinergic…

The prevalence and cost of chronic pain is a major physical and mental health care problem in the United States today. As a result, there has been a recent explosion of research on chronic pain, with significant advances in better understanding its etiology, assessment, and treatment. The purpose of the present article is to provide a review of…

The author traces the origin of his thinking on a biobehavioral systems approach to human sociobiology and argues that it is a fruitful alternative to sociobiological models derived from population biology and genetics. Available from Behavioral Science, Systems Science Publications, University of Louisville, Louisvilly, KY 40208; sc $3.75.…

Proposes a phase model describing the course of first pregnancy, while outlining an extended view of pregnancy as both a biological and psychosocial process. Four ideal phase types are distinguished: a disruption phase of radical change, an adaptation phase of readjustment, a centering phase focused on production, and a final phase of anticipation…

Two major determinants of successful parent/infant interaction models (the infant's integrative competence and the initial forms of parenting) are analyzed, with particular attention being given to preterm infants and the biological roots of parenting. (MP)

Agrees with Levenson and Crumpler's critique of ontogenetic theories as overly stressing biological determinism. Disagrees with their proposal, in discussing sociogenic and liberative models, that social influences be confined to a weak determinism. Suggests that a problem for developmental theories is to understand ways of increasing individuals'…

Sees Levenson and Crumpler's liberative model as idealistic, and critiques apparently anti-materialistic implications of the model. Maintains that Levenson and Crumpler's suggestion that the goal of adult development is to free the individual from environmental and biological influences is bad science but constitutes a valuable sermon. (BC)