Chronosystem is simply a theory. It is one of Bronfenbrenner's theory who currently has 5 different theories about the ecological system.
Chronosystem
chronosystem - is the historical conditions/systems that a person lives in... Involves a number of overlapping systems, family, peers and many others called Microsystems which shape human development. These systems make up Mesosystems and so forth... See Urie Bronfenbrenner, a leader in understanding levels of development.
There are actually5 different layers and systems to the Brofenbrenners Ecological System Theory. These layers are microsystem, mesosystem, exosystem, macrosystem, and chronosystem.
The chronosystem is one of the five systems of Bronfenbrenner's Ecological systems theory. The patterning of the environmental events and transitions over the life course, as well as sociohistorical circumstances. For example, divorce is one transition. Researchers have found that negative effects of divorce on children often peak in the first year after the divorce (Hetherington, 1993). By two years after the divorce, family interaction is less chaotic and more stable. As an example of sociohistorical circumstances, consider how the opportunities for women to pursue a career have increased during the last thirty years (Santrock, 2008). Santrock, W, J. (2008) Life-span development (11th ed). New York, America: McGraw Hill.
Bronfenbrennerâ??s ecological theory of human development places primary emphasis on environmental factors, and how they affect development. Bronfenbrenner identified five environmental systems in his theory, including the microsystem, the mesosystem, the exosystem, the macrosystem, and the chronosystem.
Microsystem - immediate environment Mesosystem - Connections between immediate environment (i.e. home and school) Exosystem - external environment that directly affects development Macrosystem - cultural contexts chronosystem - environmental events and transitions