Controlling extraneous variables

• What is the purpose of control in research?

  To eliminate influence of extraneous variables
• How can control be achieved in research?

  Through methods like matching and random allocation
• What is one method to control situational variables?

  Using standardized procedures
• What does counter balancing prevent?

  Order effects in research
• How does counter balancing work?

  By splitting participants into two groups
• What is the purpose of randomization in research?

  To prevent order effects
• What is a single-blind technique?

  Participants are unaware of the study's aim
• What do double-blind techniques control for?

  Demand characteristics from investigator effects
• How do single-blind and double-blind techniques differ?

  Single-blind blinds participants; double-blind blinds both
• What are the methods to control extraneous variables?

  • Using the same participants in both conditions
  • Matching participants based on important characteristics
  • Random allocation of participants
• What are the methods to control situational variables?

  • Standardized procedures
  • Counter balancing
  • Randomization
• What are the benefits of using control methods in research?

  • Ensures consistency across conditions
  • Avoids confounding variables
  • Enhances the validity of the study