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Social ecological model

Socio-ecological models were developed to further the understanding of the dynamic interrelations among various personal and environmental factors. Socioecological models were introduced to urban studies by sociologists associated with the Chicago School after the First World War as a reaction to the narrow scope of most research conducted by developmental psychologists. These models bridge the gap between behavioral theories that focus on small settings and anthropological theories.

Introduced as a conceptual model in the 1970s, formalized as a theory in the 1980s, and continually revised by Bronfenbrenner until his death in 2005, Urie Bronfenbrenner's Ecological Framework for Human Development applies socioecological models to human development. In his initial theory, Bronfenbrenner postulated that to understand human development, the entire ecological system in which development occurs must be taken into account. In subsequent revisions, Bronfenbrenner acknowledged the relevance of biological and genetic factors in human development.

At the core of Bronfenbrenner’s ecological model is the child’s biological and psychological makeup, based on individual and genetic developmental history. This makeup continues to be affected and modified by the child’s immediate physical and social environment (microsystem), as well as by interactions among the systems within that environment (mesosystems). Other broader social, political, and economic conditions (exosystem) influence the structure and availability of microsystems and the manner in which they affect the child. Finally, social, political, and economic conditions are themselves influenced by the general beliefs and attitudes (macrosystems) shared by members of the society. (Bukatko & Daehler, 1998)

In its simplest terms, systems theory is the idea that one thing affects another. The basic idea behind systems theory is that one thing affects another, and existence does not occur in a vacuum but rather in relation to changing circumstances. Systems are dynamic and paradoxically retain their own integrity while adapting to the inevitable changes going on around them. Our individual and collective behaviour is influenced by everything from our genes to the political environment. It is not possible to fully understand our development and behaviour without taking all of these elements into account. And indeed, this is what some social work theories insist that we do if we are to make effective interventions. Lying behind these models is the idea that everything is connected, everything can affect everything else. Complex systems are made up of many parts. It is not possible to understand the whole without recognizing how the component parts interact, affect, and change each other. As the parts interact, they create the character and function of the whole.

A system can be defined as a comparatively bounded structure consisting of interacting, interrelated, or interdependent elements that form a whole. Systems thinking argues that the only way to fully understand something or an occurrence is to understand the parts in relation to the whole. Thus, systems thinking, which is the process of understanding how things influence one another within a whole, is central to ecological models. Generally, a system is a community situated within an environment. Examples of systems are health systems, education systems, food systems, and economic systems.

Drawing from natural ecosystems which are defined as the network of interactions among organisms and between organisms and their environment, social ecology is a framework or set of theoretical principles for understanding the dynamic interrelations among various personal and environmental factors. Social ecology pays explicit attention to the social, institutional, and cultural contexts of people-environment relations. This perspective emphasizes the multiple dimensions (example: physical environment, social and cultural environment, personal attributes), multiple levels (example: individuals, groups, organizations), and complexity of human situations (example: cumulative impact of events over time). Social ecology also incorporates concepts such as interdependence and homeostasis from systems theory to characterize reciprocal and dynamic person-environment transactions.,

Individuals are key agents in ecological systems. From an ecological perspective, the individual is both a postulate (a basic entity whose existence is taken for granted) and a unit of measurement. As a postulate, an individual has several characteristics. First an individual requires access to an environment, upon which they are dependent for knowledge. Second, they are interdependent with other humans; that is, is always part of a population and cannot exist otherwise. Third, an individual is time bound, or has a finite life cycle. Fourth, they have an innate tendency to preserve and expand life. Fifth, they have capacity for behavioral variability. Social ecological models are thus applicable to the processes and conditions that govern the lifelong course of human development in the actual environment in which human beings live. Urie Bronfenbrenner's Ecological Framework for Human Development is considered to be the most recognized and utilized social ecological model (as applied to human development). Ecological systems theory considers a child's development within the context of the systems of relationship that form his or her environment.

Bronfenbrenner's ecological framework for human development was first introduced in the 1970s as a conceptual model and became a theoretical model in the 1980s. Two distinct phases of the theory can be identified. Bronfenbrenner stated that "it is useful to distinguish two periods: the first ending with the publication of the Ecology of Human Development (1979), and the second characterized by a series of papers that called the original model into question." Bronfenbrenner's initial theory illustrated the importance of place to aspects of the context, and in the revision, he engaged in self-criticism for discounting the role a person plays in his or her own development while focusing too much on the context. Although revised, altered, and extended, the heart of Bronfenbrenner's theory remains the ecological-stressing person-context interrelatedness.

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