7.1.2.1 Independent and Dependent Variables

• What is the purpose of manipulating the independent variable?

  To see if it causes a change in the dependent variable.
• How does the dependent variable relate to the independent variable in an experiment?

  The dependent variable changes due to the independent variable.
• What is the definition of a dependent variable?

  It is what you measure in an experiment.
• How does the independent variable affect the dependent variable?

  It causes a different result in the dependent variable
• What is the independent variable in psychology research?

  What you change
• If you change the amount of sleep to see its effect on mood, what is the independent variable?

  Amount of sleep
• In a study on exam scores, what is the independent variable if study time is being tested?

  The length of study time.
• What are the key characteristics of independent and dependent variables?

  • Independent Variable:
  • Definition: What the experimenter manipulates
  • Purpose: To cause a change
  • Example: Amount of sleep

  
  

  • Dependent Variable:
  • Definition: What the experimenter measures
  • Purpose: To show the effect
  • Example: Mood level
• What is the dependent variable in an experiment?

  What gets measured
• What is the relationship between independent and dependent variables in an experiment?

  The independent variable affects the dependent variable
• What are the independent and dependent variables in the "Exercise and Mood" experiment?

  • Independent Variable: Exercise duration (0 mins, 30 mins, 60 mins)
  • Dependent Variable: Mood state
• What is the dependent variable in psychology research?

  What you measure
• What are the independent and dependent variables in the "Caffeine and Alertness" experiment?

  • Independent Variable: Caffeine dose (0mg, 50mg, 100mg)
  • Dependent Variable: Alertness level
• If you want to see how changing the temperature affects the rate of a chemical reaction, what is the independent variable?

  The temperature
• How can adjusting the independent variable lead to different outcomes in the dependent variable?

  By changing conditions that influence results
• What is the independent variable in an experiment?

  What experimenters manipulate
• What are the independent and dependent variables in the "Stress and Memory" experiment?

  • Independent Variable: Level of stress (high vs. low)
  • Dependent Variable: Memory score
• In an experiment measuring mood based on sleep, what is the dependent variable?

  Mood level
• In an experiment, if you adjust the volume on a TV, what is the independent variable?

  The volume on the TV
• Why do researchers manipulate the independent variable?

  To observe its effect on the dependent variable
• Why is the dependent variable important in an experiment?

  It shows the effect of the independent variable.
• What is the definition of an independent variable?

  It is manipulated by the experimenter.
• What is the dependent variable in an experiment?


  What you measure in the experiment
• How does the independent variable affect the experiment?

  It causes a change in the dependent variable
• How does the independent variable relate to the dependent variable in an experiment?

  The independent variable is tested to see its effects on the dependent variable.