Psychology › Section O · Psychological disorders › Topic O.6
Posttraumatic stress disorder
After a terrifying event, most people gradually recover, but for some the danger keeps replaying long after it has passed; posttraumatic stress disorder (PTSD) describes that pattern. This topic is for education only, not for diagnosing yourself or anyone else; if you are struggling after a trauma, see a qualified professional, and in a US crisis call or text 988.
In this topic
- From shell shock to PTSD
- What counts as a traumatic event
- The four symptom clusters
- Acute stress and delayed expression
- How common is PTSD?
- Risk and protective factors
- Worked example: sorting symptoms into clusters
- The learning account
- Worked example: the cognitive model
- Common mistakes to avoid
- Key takeaways
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