The following characteristics of the lifespan perspective reflect continuity and discontinuity in development:
The description and explanation of developmental change may be the primary responsibility of developmental scientists. Throughout their lifetime, people can change, and these intraindividual changes can vary from person to person. The notions of developmental continuity and discontinuity are used to describe and explain intraindividual change, whereas the ideas of stability and instability are used to describe and explain interindividual variations in intraindividual change.
Descriptions or explanations of development may include quantitative or qualitative changes with reference to continuity and discontinuity. Quantitative changes that are descriptive entail variations in how much (or how many) of something there are.
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