Understanding Experimental Design Concepts

The video tutorial covers key experimental terms: experimental unit, treatment, response variable, factor, placebo, and confounding. Each term is defined and explained in the context of experiments. The tutorial emphasizes understanding how these elements interact and affect experimental outcomes, highlighting the importance of controlling variables and using placebos for blinding. Confounding variables are discussed as factors that can obscure the relationship between explanatory and response variables, necessitating careful experimental design.

What is the main objective of the interactive assignment in section 1.6?

• To create a new experimental design

• To analyze survey data

• To define key terms related to experimental design

• To conduct an experiment

What is the purpose of defining key terms in experimental design?

• To ensure clarity and understanding

• To create a new experimental design

• To conduct an experiment

• To analyze survey data

In an experiment, what is an 'Experimental Unit' often referred to as when it is a person?

• A subject

• A factor

• A response variable

• A treatment

Which of the following best describes an 'Experimental Unit'?

• A placebo used in control groups

• A combination of factors

• A variable whose effect is assessed

• A person, object, or item upon which a treatment is applied

Which term refers to a person, object, or item upon which a treatment is applied?

• Response Variable

• Placebo

• Factor

• Experimental Unit

What is a 'Treatment' in the context of an experiment?

• A placebo given to control groups

• A factor affecting the outcome

• A combination of values of explanatory variables

• A response variable

How does a 'Treatment' relate to explanatory variables?

• It is independent of them

• It is a combination of their values

• It is a placebo

• It is a response variable

Which of the following is a combination of values of explanatory variables?

• Placebo

• Treatment

• Response Variable

• Factor

What is a 'Response Variable' in an experiment?

• A variable that is affected by the explanatory variable

• A factor that is controlled

• An independent variable

• A placebo

Which statement best describes a 'Response Variable'?

• It is a placebo used in experiments

• It is a dependent variable affected by the treatment

• It is a variable that affects the explanatory variable

• It is a factor that remains constant