Experimental Design

Front

What is experimental design?

Back

Experimental design is the process of planning an experiment to ensure that the results are valid and reliable. It involves selecting subjects, assigning them to groups, and determining how treatments will be applied.

Front

What is a sample size?

Back

Sample size refers to the number of subjects included in a study. A larger sample size can lead to more reliable results, while a smaller sample size may increase the risk of bias.

Front

What is an observational study?

Back

An observational study is a type of research where the researcher observes subjects without manipulating any variables or applying treatments.

Front

What is the purpose of a control group in an experiment?

Back

The control group serves as a baseline for comparison, allowing researchers to determine the effect of the treatment by comparing it to a group that does not receive the treatment.

Front

What does double blinding mean in an experiment?

Back

Double blinding is a method where neither the participants nor the researchers know who is receiving the treatment or the placebo, reducing bias in the results.

Front

What is random assignment?

Back

Random assignment is the process of randomly allocating subjects to different treatment groups to ensure that each group is similar in characteristics, minimizing confounding variables.

Front

What is confounding in experimental design?

Back

Confounding occurs when an outside variable influences both the independent and dependent variables, potentially skewing the results of the experiment.

Front

What is an explanatory variable?

Back

An explanatory variable, also known as an independent variable, is the variable that is manipulated or changed in an experiment to observe its effect on the dependent variable.

Front

What is a dependent variable?

Back

A dependent variable is the outcome or response that is measured in an experiment to assess the effect of the independent variable.

Front

What is the significance of random sampling?

Back

Random sampling ensures that every individual in a population has an equal chance of being selected, which helps to create a representative sample and reduces bias.