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Portal-Foster, C. W.; And Others – 1969
The proposed research design, to be actualized beginning in 1969, was evolved to determine the nature and prevalence of mental retardation in Canada and to relate them to other variables. Issues raised concerning both nature and prevalence were reviewed as were surveys in seven different geographic areas. A pilot study conducted in two small…
Descriptors: Community Attitudes, Demography, Disadvantaged, Etiology
Peer reviewed Peer reviewed
LaPrelle, John; And Others – Evaluation Review, 1992
High intercommunity variation in adolescent smoking precluded detection of effects of mass media campaigns on initiation of cigarette smoking in a study with a final sample of 1,637 adolescent subjects. Implications for studies using the individual as unit of analysis and the community as unit of randomization are discussed. (SLD)
Descriptors: Adolescents, Analysis of Variance, Community Programs, Etiology