Experimental Design

• What topic does the video cover?

  Experimental design in psychology
• What is the relationship between participant sample and independent variable?

  They are combined in experimental design
• What are the two experimental designs discussed?

  • Repeated measures design
  • Independent groups design
• What is a repeated measures design?

  All participants complete both conditions
• How is data collected in independent groups design?

  Data from different groups is compared
• What is a potential issue with independent groups design?

  Participant variables may influence results
• How could participant variables affect a study on temperature and reaction times?

  Younger participants may skew the results
• What is a repeated measures design?

  Participants complete both conditions of the experiment
• What type of data is collected in repeated measures design?

  Related data from the same participants
• What is a problem with repeated measures design?

  Order effects may influence participant performance
• How can order effects be controlled in repeated measures design?

  By using counterbalancing
• What does counterbalancing do?

  Balances order effects across conditions
• What is a disadvantage of independent groups design?

  It requires more participants than repeated measures
• What are demand characteristics in repeated measures design?

  Participants may change behavior to please researchers
• What are the strengths and weaknesses of independent groups and repeated measures designs?

  Strengths of independent groups:

  • Reduces order effects
  • Simpler for participants

  
  

  Weaknesses of independent groups:

  • Requires more participants
  • Participant variables may affect results

  
  

  Strengths of repeated measures:

  • Fewer participants needed
  • Controls for participant variables

  
  

  Weaknesses of repeated measures:

  • Order effects may influence results
  • Demand characteristics may arise
• What is a matched pairs design?

  Two groups matched on a characteristic are used
• How are participants assigned in matched pairs design?

  Based on a characteristic that influences results
• What is a disadvantage of matched pairs design?

  It takes longer to set up
• What is a potential issue with matched pairs design?

  Participants are similar but not identical
• What resources are available for students on psych boost?

  • Tutorial videos on research methods
  • Worked examples for exam questions
  • Printable resources for A-level
• Who supports the psych boost initiative?

  Students and teachers on Patreon
• What is the purpose of the support from patrons?

  To allow part-time teaching and content creation
• What will be covered in the next video?

  Variables in research methods