Ed 603 Quiz 13

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  1. In experimental research, the researcher manipulates at least one
    1. independent variable.
    2. dependent variable.
    3. independent variable and one dependent variable.

  2. In experimental research, the researcher
    1. manipulates at least one independent variable, controls other relevant variables, and observes the effect on some dependent variable.
    2. collects data in order to determine whether, and to what degree, a relationship exists between two quantifiable variables.
    3. collects and analyzes data in order to test hypotheses or answer questions concerning the current status of the subjects.

  3. For a situation in which the investigator has a choice of doing an experimental or some other kind of study, which of the following would be a sound reason for choosing a nonexperimental study?
    1. The nonexperimental study probably will be more economical in terms of time and subjects.
    2. Not enough background knowledge is known about all variables to decide which ones to manipulate in the experiment.
    3. The number of dependent variables to be studied exceeds the number of independent variables.
    4. Internal validity is much more important than external validity for the particular study in question.

  4. Causal relationships betwen variables are most likely to be discovered through which type of research?
    1. correlational
    2. descriptive
    3. experimental
    4. ex post facto (causal-comparative)

  5. In an experiment to determine the effect of tempo of music on workers' productivity, the dependent variable is the
    1. number of workers.
    2. the tempo of the music.
    3. workers' productivity.
    4. years of experience of the workers.

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