Which Situation Describes Potential Observer Bias in an Experimental Process

question 72

Multiple Choice

Which situation describes potential observer bias in an experimental process?

• A) Dr. Jones is evaluating cancer patients for their responses to a new therapeutic drug. She knows which patients are receiving the placebo and which are receiving the drug.
• B) Mr. Bromley is conducting a survey of weight loss for his professor. He asks each student in the study the same questions.
• C) Ms. Bradley is an outside consultant who is conducting a health and wellness survey for a pharmaceutical company. She does not know the name of the company nor does she know the name of the drug being tested during the survey.
• D) Dr. Postgate is analyzing biopsy samples from rats that have been given either a placebo or an experimental drug believed to reduce inflammation. Each sample is identified by a code number so that Dr. Postgate cannot tell which treatment the rats received.

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Definitions:

Welded Texture

A texture found in volcanic rocks, formed when hot volcanic ash and debris fuse together under pressure.

Volcanic Breccia Texture

A coarse-grained volcanic rock composed of angular to subangular fragments bonded together by a fine-grained matrix, typically formed from explosive volcanic eruptions.

Igneous Rock

is a type of rock formed through the cooling and solidification of magma or lava.

Welded Texture

A term used in geology to describe rocks that have been fused together by high temperatures, often found in volcanic deposits.