Reliability

• What is the focus of psychology in relation to measurement?

  Measuring behavior consistently
• Why is reliability important in psychological measurements?

  It ensures consistent results across studies
• What are some measurement tools used by psychologists?

  Questionnaires, interviews, observations
• What is external reliability in psychological research?

  Consistency of results across different times
• What is internal reliability in psychological measures?

  Consistency among different parts of a measure
• What method assesses internal reliability using a questionnaire?

  Split-half method
• How does the split-half method work?

  It splits a measure into two parts
• What does a strong correlation in the split-half method indicate?

  High internal reliability
• What is the test-retest method used for?

  Assessing external reliability
• What does a strong correlation in the test-retest method indicate?

  High external reliability
• What is inter-observer reliability?

  Agreement between different observers' results
• How do researchers assess inter-observer reliability?

  By comparing results from two observers
• What statistical tests are used to measure correlation?

  Pearson's r or Spearman's rho
• What correlation value indicates a reliable measure?

  0.8 or stronger
• What can improve reliability in observational studies?

  Training observers and refining behavioral categories
• How can interviews be structured to improve reliability?

  By carefully phrasing questions
• What type of questions can improve reliability in questionnaires?

  Closed questions
• What should researchers do if a questionnaire measures an established factor?

  Use an established test instead of creating a new one
• What is important for experiments to ensure reliability?

  Using a clear standardized procedure
• What should researchers keep constant to improve reliability?

  Environmental conditions
• What is the focus of the next research methods video mentioned?

  Validity