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A researcher wants to assess the effect of classical music on performance on a math test....

  1. A researcher wants to assess the effect of classical music on performance on a math test. The researcher assigns participants to two groups: music and control (no music). During the experiment, the researcher spent more time explaining the instructions of the test and motivating the participants in the music group, compared to the time spent with the control group. Results showed that the group of students who listened to classical music performed better on the math test as compared to the control group. This situation is an example of:

    Double-blind observation

    Observer bias

    Random sampling

    Case method

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Answer #1

Answer-(a) Double blind observation

A double blind observation is used to avoid partiality in an experiment. It eliminates the risk of bias research outcomes.

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