Dr.Muhammed wants to know if people will rate facial photographs more or less favorably based on the skin color and facial features of the pictures.He digitally alters photographs and mixes the features on each picture,so that participants in his study do not know exactly what they are looking at.Keeping participants unaware of the exact nature of the study in which they are participating helps reduce __________ effects.
A) criterion
B) subject-expectancy
C) placebo
D) observer bias

Question

Quizplus · Accepted Answer

Subject-expectancy effects occur when participants have expectations and behave in a certain way that aligns with those expectations, leading to bias in the results. By keeping participants unaware of the exact nature of the study, Dr. Muhammed reduces the likelihood of subject-expectancy effects influencing the results. The other options listed (criterion, placebo, and observer bias) are not directly relevant to the scenario described.

DrMuhammed Wants to Know If People Will Rate Facial Photographs