Variables in Experiments

What is the definition of an independent variable?

• A variable that is manipulated or controlled by the researcher in an experiment.

• A variable that is determined by chance in an experiment.

• A variable that is not relevant to the experiment.

• A variable that is measured or observed in an experiment.

What is the definition of a dependent variable?

• A dependent variable is the variable being measured or observed in an experiment or study.

• A dependent variable is the variable that is controlled by the researcher in an experiment or study.

• A dependent variable is the variable that remains constant in an experiment or study.

• A dependent variable is the variable that is manipulated in an experiment or study.

In an experiment, which variable is deliberately changed or manipulated by the researcher?

• extraneous variable

• control variable

• dependent variable

• independent variable

In an experiment, which variable is measured or observed to determine the effect of the independent variable?

• independent variable

• control variable

• dependent variable

• extraneous variable

True or False: The independent variable is the variable that is affected or influenced by the dependent variable.

• False

• Both the independent and dependent variables affect each other

• True

• The independent variable has no effect on the dependent variable

What is the purpose of controlling variables in experiments?

• To isolate and manipulate specific factors to determine their impact on the outcome.

• To introduce bias into the experiment

• To make the experiment more complicated

• To ensure accurate results are not obtained

Why is it important to have only one independent variable in an experiment?

• To make the experiment more interesting.

• To confuse the participants.

• To establish a clear cause and effect relationship between the independent variable and the dependent variable.

• To increase the complexity of the experiment.

What is the term used to describe variables that are kept constant or unchanged in an experiment?

• manipulated variables

• independent variables

• controlled variables

• dependent variables

True or False: Controlling variables in an experiment helps ensure that any observed effects are due to the independent variable and not other factors.

• False

• Controlling variables in an experiment has no effect on observed effects

• Controlling variables in an experiment can introduce bias

• True

What is the role of the dependent variable in an experiment?

• The role of the dependent variable is to be measured or observed in an experiment.

• The dependent variable is not important in an experiment.

• The dependent variable is used to control the independent variable in an experiment.

• The dependent variable is manipulated by the researcher in an experiment.