Understanding Variables in Experiments

The video tutorial explains the concepts of independent and dependent variables in experiments. It describes how the independent variable is manipulated to observe its effect on the dependent variable. An example of a plant growth experiment is used to illustrate these concepts, emphasizing the importance of controlling other variables to ensure accurate results.

What is the primary focus of the video tutorial?

• Understanding psychological disorders

• Analyzing famous psychological experiments

• Explaining independent and dependent variables

• Discussing the history of psychology

Which variable is manipulated in an experiment?

• Dependent variable

• Control variable

• Outcome variable

• Independent variable

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

• It is the variable that is manipulated

• It is the variable that is ignored

• It is the variable that changes in response to the independent variable

• It is the variable that remains constant

In the plant growth experiment, what is kept constant?

• Amount of fertilizer

• Amount of water and sunlight

• Type of soil

• Type of plant

What is the independent variable in the plant growth experiment?

• Amount of water

• Amount of fertilizer

• Amount of sunlight

• Type of plant

What is the dependent variable in the plant growth experiment?

• Height of the plants

• Amount of water

• Type of soil

• Amount of fertilizer

Why is it important to keep some variables constant in an experiment?

• To reduce the cost of the experiment

• To isolate the effect of the independent variable

• To ensure the experiment is easy to conduct

• To make the experiment more interesting

What does the experimenter measure to determine the effect of the independent variable?

• The type of soil used

• The amount of water given

• The growth of the plants

• The amount of fertilizer used

In the context of the video, what does the term 'manipulated' refer to?

• Changing the independent variable

• Ignoring the control variables

• Changing the dependent variable

• Keeping all variables constant

What is the main goal of manipulating the independent variable in an experiment?

• To confuse the participants

• To observe changes in the dependent variable

• To make the experiment more complex

• To ensure all variables are equal