AQR Vocab Review

Something that researchers administer to participants in an experimental study. 

• Placebo Effect
• Treatment
• Variable of Interest
• Population

A question that states what a researcher will attempt to answer and that guides research design. 

• Observational Study
• Experimental study
• Control group
• Research question

A statement that proposes that something is different, incorrect, or changed from what is accepted or claimed.

• Research Question
• Null Hypothesis
• Alternative Hypothesis
• Placebo Effect       

The entire collection of items or subjects that are the focus of concern in a study.

• Population
• Control Group
• Variable of Interest
• Treatment

Research in which data is collected by observation or survey, about some characteristic of the population.

• Research Questions
• Population
• Experimental Study
• Observational Study

Research in which the researcher separates participants into two or more groups, applies some sort of treatment, then compares the results.

• Observational Study
• Experimental Study
• Treatment
• Control Group

Generally a statement of “no effect”, stating that there is no difference between what is claimed and what is measured.

• Null Hypothesis
• Placebo Effect       
• Alternative Hypothesis
• Control Group

A phenomenon in which a person, who is receiving an inactive drug or treatment, experiences similar or the same effects as someone receiving the active drug or treatment.

• Null Hypothesis
• Alternative Hypothesis
• Control Group
• Placebo Effect       

A group in an experimental study that does not receive a treatment.

• Population
• Control Group
• Placebo Effect       
• Treatment

Measured result in an experimental study. 

• Treatment
• Research Questions
• Variable of Interest
• Experimental Study