CMN 102 Empirical Methods in Communication Final UC Davis Ruiz Study Guide Test.

CMN 102 Empirical Methods in Communication Final UC Davis Ruiz Study Guide Test. experimentation - correct answer manipulating a variable and observing the effects in a controlled situation Classic Experiment - correct answer involves examining the effect of an independent variable (the experimental stimulus) on a dependant variable. independant variable - correct answer the variable manipulated by the experimenters. dependant variable - correct answer presumed effect of independent variable control - correct answer group who was not manipulated double blind experiment - correct answer neither subjects or experimenters know the mempership of the experimental and control groups. probability sampling - correct answer randomly selecting subjects from a sampling frame randomization - correct answer a sample of subjects is obtained and is randomly assigned to an experimental or control group. Matching - correct answer similar subjects are identified and then randomly asigned to an experimental or condition pre-experimental designs - correct answer weak designs that lack a control group for comparison Solomon experiment design - correct answer 4 group design. 2 experimental, two contril groups, one of each is pretested. threats to internal validity - correct answer statistical regression, selection biase, attrition/experimental mortality, and demoralization natural experiments - correct answer less artificial but lack experimental control hypothesis - correct answer a testable statement of a potential relationship between two or more variables mediator variable - correct answer accounts for relationship between independent and dependant variable