Internal Validity

Which of the following best describes the primary characteristic and resulting advantage of a laboratory experiment?

A researcher is conducting a study to see if blue light exposure affects alertness. Match each component of this laboratory experiment with its specific application in the study scenario.

A psychology researcher is designing a laboratory experiment to test a new hypothesis. Arrange the following steps in the correct logical order to demonstrate how the researcher moves from a controlled setting to a valid causal conclusion.

A researcher concludes that a laboratory experiment is the most effective choice for a study whose primary goal is to ensure findings can be generalized to natural, real-world environments, because the high degree of control ensures the results are universally valid.

You are creating a research protocol for a laboratory experiment to determine if 'blue-light exposure' before a task affects 'concentration levels.' Which of the following plans correctly synthesizes the necessary components to maximize internal validity and allow for causal conclusions?

A laboratory experiment is a research study conducted in a highly controlled environment to minimize outside influences.

Match each core characteristic or outcome of a laboratory experiment with the description that best explains its role in psychological research.

Because researchers can manipulate variables and minimize outside influences in a highly controlled setting, a study conducted under these conditions typically possesses high _____ validity, which allows researchers to draw strong causal conclusions.

A researcher designs an experiment to test whether a new reading software improves comprehension. In the initial design, participants use the software in a noisy classroom, introducing extraneous variables. To isolate the software's effect, the researcher moves the study to a quiet, standardized computer laboratory. By eliminating these external influences to ensure that only the software is causing the change in comprehension, the researcher is analyzing and modifying the study's design to maximize its _____ validity.

An undergraduate student is evaluating a published study to determine if the authors' strong causal conclusion is justified. Arrange the steps of this evaluation process in the correct logical sequence, starting with checking the study's setting and ending with making a final judgment about the causal claim.