The use of blind or double-blind investigators in a study is done to avoid:
A) sampling error.
B) sample bias.
C) uncontrollable variables.
D) researcher bias.
E) random error.

Question

Quizplus · Accepted Answer

The use of blind or double-blind investigators is done to avoid researcher bias, which occurs when the researcher's expectations or beliefs about the results influence the study's outcome. By keeping the investigator blind to certain information, such as which group received the treatment or placebo, this bias can be minimized. Sampling error, sample bias, uncontrollable variables, and random error can still occur even with blinded investigators. The use of blind or double-blind investigators in a study is done to avoid researcher bias. This type of bias can occur when the researcher's knowledge, beliefs, or expectations influence the study's outcome or their interpretation of the results. Using blind or double-blind investigators helps ensure that the results are more objective and less influenced by the researcher's biases.

The Use of Blind or Double-Blind Investigators in a Study