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In single-case experiments, direct observation is always better than using self-report scales or available records.
Middle Adulthood
The period of life typically ranging from about 40 to 65 years old, marked by stable work and family life.
Positive Checks
Factors that increase mortality rates, such as disease, starvation, and war, traditionally discussed in the context of population control theories.
Thomas Malthus
An English economist and demographer best known for his theory that population growth will outpace agricultural production, leading to widespread poverty and societal collapse unless checked by factors like famine, disease, or war.
Population Growth
The increase in the number of individuals in a population, measured by natural growth (births minus deaths) and net migration.
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