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  • 3 June 2024
    Yuting Shen
    Weissman et al (2005)
    Thanks!
  • 3 June 2024
    Yuting Shen
    Caspi et al (2003)
    oh ok, so may I understand it this way? so for the RM used in Caspi,  both (natural and quasi) are accepted in IB, but it's better to write it as natural
  • 3 June 2024
    Narges Rahimi
    Extended Essay
    Dear John, Please could you let me know if the following EE question is suitable? To what extent Cognitive Behavioral Therapy (CBT)  is effective in treating post-traumatic stress disorder (PTSD) Thank you
  • 3 June 2024
    Yuting Shen
    Kearins (1981)
    Hi John,Is this quasi or natural experiment?