Reliability

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

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

  It ensures consistent results across measurements
• What is external reliability in psychological measures?

  Consistency of results when repeated by others
• What is internal reliability in psychological measures?

  Consistency among different parts of a measure
• How can the split-half method assess internal reliability?

  By comparing results from two halves of a test
• What does a strong correlation in the split-half method indicate?

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

  To assess external reliability of a measure
• What indicates a lack of external reliability in a test-retest scenario?

  Significantly different results on retest
• What is inter-observer reliability in observational studies?

  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 correlations?

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

  0.8 or stronger
• How can researchers improve reliability in observational studies?

  By training observers and refining categories
• Why should behavioral categories be operationalized?

  To ensure precise measurement of behaviors
• How can structured interviews improve reliability?

  By ensuring questions are clearly phrased
• What type of questions can reduce confusion in questionnaires?

  Closed questions
• What should researchers do if measuring established factors?

  Use established tests instead of new ones
• How should experiments be designed to ensure reliability?

  With clear standardized procedures
• What should researchers keep constant in experiments?

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

  Validity