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Lecture

SOCB05; LEC07.docx

3 Pages
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Department
Sociology
Course Code
SOCB05H3
Professor
Rania Salem

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Description
SOCB05; LEC07 DEFINING SOCIAL EXPERIMENTS - the researcher deliberately introduces changes into the environment of subjects and observes or measures the effects of the changes o introduce a sort of change o observe o tests for causality TYPES OF PREEXPERIMENTAL RESEARCH: THE ONE SHOT CASE STUDY - a single group of subjects is exposed to an experimental treatment - the dependent variable is measured along all subjects - not recommended for use in social research - suppose I want to know if prof comments effect students marks o independent; first mark o dependent; second mark - applied to all subjects o post test TYPES OF PREEXPERIMENTAL RESEARCH: THE ONE GROUP PRETEST POSTTEST DESIGN - the dependent variables is measured among all subjects - all subjects are exposed to an experimental treatment - the dependent variable is measured among all subjects TYPES OF PREEXPERIMENTAL RESEARCH: THE STATIC GROUP COMPARISON - some subjects are exposed to an experimental treatment (treatment group) while others are not (control group) - the dependent variable is measured among all subjects o one group would have comments, one would not o then compare how each did for the final exam BASIC FEATURES OF CLASSIC EXPERIMENTAL DESIGNS - subjects are randomly assigned to treatment and control groups - the dependent variable is measured among all subjects using a pre-test (baseline) - subjects in the treatment group are exposed to the treatment (independent variable) and subjects in the control group are not exposed to the treatment - the depedent variable is measured among all subjects using a post-test (endline) o put students in a-f o tosses a coin to assign each of the marked piles to the piles o one side would have comments o others did not o final steps; gave out the same test  made comparisons o TEACHERS COMMENTS IMPROVE CAUSALITY IN CLASSIC EXPERIMENTAL DESIGNS - correlation o the independent variable should be associated with the dependent variable in the manner hypothesized - temporal ordering o the dependent variable could
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