longitudinal studies

• What is a longitudinal study?

  A study of people over a long period
• What is the aim of longitudinal studies?

  To record changes over time
• Why are longitudinal studies useful for researchers?

  They track changes in individuals and groups
• What are the advantages of longitudinal studies?

  • Monitor changes in social aspects
  • Valid due to qualitative data collection
  • Track changes and establish trends
• What social aspects can longitudinal studies monitor?

  Educational achievement, employment, and poverty
• Why are longitudinal studies considered valid?

  They collect qualitative data through observations
• What can longitudinal studies establish?

  Changes and trends over time
• What are the disadvantages of longitudinal studies?

  • Time-consuming
  • Costly due to participant tracking
  • High attrition rate
  • Non-representative samples
  • Observer effect may produce invalid data
• What is a major disadvantage of longitudinal studies regarding time?

  They are time-consuming
• Why are longitudinal studies considered costly?

  Hard to keep track of participants over time
• What is the attrition rate in longitudinal studies?

  The rate at which participants withdraw
• What happens if many participants withdraw from a longitudinal study?

  The sample may become non-representative
• What does a non-representative sample imply for data collected?

  It cannot be used for generalizations
• What is the observer effect in longitudinal studies?

  Participants may change behavior when monitored