Original Findings Leading to the Hawthorne Effect

Controlling for the Hawthorne Effect in Experiments

A company's management team wants to test if playing classical music in a factory will increase worker productivity. For one week, they play the music and have supervisors walk the floor frequently to monitor the workers' output. Productivity increases by 15%. The next week, they continue playing the music but remove the frequent monitoring. Productivity levels return to what they were before the experiment began. Which of the following best explains the initial 15% increase in productivity?

Example of Reactivity: Acting Differently in a Bar

Which of the following best defines the Hawthorne effect in the context of observational research?

Match each component of the Hawthorne effect to its specific role within a psychological research study.

In a study of factory workers, researchers observed that productivity increased when the lighting was made brighter and also increased when the lighting was made dimmer. If a researcher concludes that the specific level of illumination was the primary cause of these performance gains, their analysis of the results is scientifically valid.

A research supervisor is evaluating the validity of the 1920s factory experiments discussed in the video. Arrange the following findings in order from the one that provides the WEAKEST support for the Hawthorne effect (least able to rule out physical causes) to the one that provides the STRONGEST support (best able to isolate the effect of being observed).

You are designing a study to observe the natural workflow of teachers in a local school. Based on the performance shifts observed in the hospital hand-washing study (watch the video from 13s to 25s), which of the following original research protocols would you create to ensure your data reflects the teachers' true, unobserved behavior rather than a temporary improvement caused by your presence?

The Hawthorne effect refers to a phenomenon where research participants modify their behavior primarily because of physical changes in their environment, such as lighting adjustments, rather than the awareness of being observed.

A researcher is studying noise levels in a university library. They sit at a table with a decibel meter and a sign that says 'Research Study in Progress.' If the students whisper more quietly than they normally do specifically because they are aware of the researcher's presence, the study is experiencing the _____.

Match each hypothetical observational research scenario to the specific methodological term or consequence it represents.

A researcher studying classroom attention compares two designs: one where a researcher sits visibly at the front desk, and one where classroom behavior is recorded via a hidden camera. By analyzing the difference in student posture between the two setups, the researcher is checking for the presence of the _____, which would bias the study's conclusions.

Evaluate the following observational research designs. Order them from the HIGHEST risk of introducing the Hawthorne effect (1) to the LOWEST risk of introducing the Hawthorne effect (4).

Define the Hawthorne effect and recall how this specific phenomenon impacts the validity of observational research.

Based on the provided context of participant reactivity, diagnose what psychological phenomenon is likely to occur in this setup, and justify how this setup affects the validity of the researcher's observations.

An industrial-organizational psychologist plans to study productivity changes in a factory. To control for the Hawthorne effect, what design choice must the researcher make regarding how they observe the workers, and why?