Demographics
Demographics
are the quantifiable statistics of a given population. Demographics are also
used to identify the study of quantifiable subsets within a given population
which characterize that population at a specific point in time.
Demography
is used widely in public opinion polling and marketing. Commonly examined
demographics include gender, age, ethnicity, knowledge of languages,
disabilities, mobility, home ownership, employment status, and even location.
Demographic trends describe the historical changes in demographics in a
population over time (for example, the average age of a population may increase
or decrease over time). Both distributions and trends of values within a
demographic variable are of interest. Demographics can be viewed as the
essential information about the population of a region and the culture of the
people there.
Psychometrics
Psychometrics
is the field of study concerned with the theory and technique of psychological
measurement. One part of the field is concerned with the objective measurement
of skills and knowledge, abilities, attitudes, personality traits, and
educational achievement. For example, psychometric research has concerned
itself with the construction and validation of assessment instruments such as
questionnaires, tests, rater’s judgments, and personality tests. Another part
of the field is concerned with statistical research bearing on measurement
theory.
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