Single-session early psychological interventions became widely advocated during the 1980s and 1990s as a way to prevent the development of psychological sequalae following traumatic events. There have now been 13 randomised controlled trials of single-session interventions within 1 month of a traumatic event. Notwithstanding their methodological shortcomings and clinical heterogeneity, the results are neutral overall in terms of clinical effectiveness. Possible explanations include a failure to encourage individuals' personal coping mechanisms and defence mechanisms and that insufficient time was allowed for habituation to intense exposure to occur. With the present evidence, the routine use of single-session interventions following traumatic events cannot be justified. This does not mean that there should be nothing offered, as many individuals involved in traumatic events clearly have emotional needs. Hopefully, future research will identify alternative forms of early intervention that prove useful to those individuals who would otherwise develop more significant psychological difficulties.

中文翻译：

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创伤事件后的单节早期心理干预。

在1980年代和1990年代，单阶段早期心理干预已得到广泛提倡，作为预防创伤事件后心理性角膜炎发展的一种方法。现在，在创伤事件发生后的1个月内，有13项单次干预措施的随机对照试验。尽管存在方法上的缺陷和临床异质性，但就临床有效性而言，结果总体上是中性的。可能的解释包括未能鼓励个人的个人应对机制和防御机制，以及没有足够的时间习惯于强烈暴露。根据目前的证据，在创伤事件之后常规使用单阶段干预措施是不合理的。这并不意味着不提供任何东西，许多参与创伤事件的人显然有情感需求。希望未来的研究将发现早期干预的替代形式，这些替代形式被证明对那些原本会发展出更大心理障碍的人有用。