Objectives: The current study aims to generate insights from sexual offenders on noncompleted sexual offences, that is, on offences that were stopped or discouraged. Methods: Using a sample of sexual offenders who initiated a sexual offence but were stopped or discouraged in action, which we refer to as noncompleted offences, we first examine which and how situational factors and internal states may affect their assessment of risks of apprehension and difficulties in this context. Second, we examine whether situational factors, internal states as well as perceived risks and difficulties can predict offence noncompletion. Linear and logistic regression models were estimated based on the type of offence (noncompleted sexual offences against women or children). Results: Main findings indicate that victim physical resistance is critical for how sex offenders are perceiving difficulties related to offending against women. The presence of a person nearby and victim resistance are predictive of noncompletion of sexual offences against children. Conclusion: This is a critical line of research because knowledge on the factors and circumstances that can discourage or stop offenders from committing crimes can be used by scholars and practitioners to think of prevention initiatives to reduce opportunities of crime.

目标：目前的研究旨在让性犯罪者对未完成的性犯罪（即已停止或阻止的犯罪）产生见解。方在这种情况下。其次，我们研究了情境因素、内部状态以及感知的风险和困难是否可以预测犯罪未完成。根据犯罪类型（针对妇女或儿童的未完成性犯罪）估计线性和逻辑回归模型。结果：主要调查结果表明，受害者的身体抵抗对于性犯罪者如何感知与侵犯女性相关的困难至关重要。附近有人和受害者的抵抗预示着对儿童的性犯罪未完成。结论：这是一个关键的研究方向，因为学者和从业人员可以利用有关可以阻止或阻止犯罪者犯罪的因素和情况的知识来考虑减少犯罪机会的预防措施。