Consider a 2 X 2 Experiment Design in Which Both

question 48

Multiple Choice

Consider a 2 x 2 experiment design in which both study time and sleep time have been manipulated and learning has been measured. An interaction between study time and sleep time can be interpreted to mean which of the following?

• A) Sleep time affects learning, controlling for study time.
• B) Sleep time has no effect on learning.
• C) The effect of study time on learning is different in the different levels of sleep time.
• D) If the main effects are also significant, the interaction between study time and sleep time cannot be interpreted.

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Definitions:

Placebo Effect

The beneficial effect on a patient's health condition following a placebo treatment, due to the patient's belief in the treatment's efficacy.

Sampling Bias

A systematic error in a research study resulting from non-random sampling of participants, leading to unrepresentative sample data.

Experimenter Bias

A type of bias that occurs when a researcher's expectations or preferences about the outcome of a study influence the results obtained.

Socially Desirable Responding

The tendency of respondents to answer questions in a manner that will be viewed favorably by others, often leading to overreporting of "good" behavior and underreporting of "bad" behavior.