The processing of extraposed structures in English

In most languages, most of the syntactic dependency relations found in any given sentence are projective: the word-word dependencies in the sentence do not cross each other. Some syntactic dependency relations, however, are non-projective: some of their word-word dependencies cross each other. Non-projective dependencies are both rarer and more computationally complex than projective dependencies; hence, it is of natural interest to investigate whether there are any processing costs specific to non-projective dependencies, and whether factors known to influence processing of projective dependencies also affect non-projective dependency processing. We report three self-paced reading studies, together with corpus and sentence completion studies, investigating the comprehension difficulty associated with the non-projective dependencies created by the extraposition of relative clauses in English. We find that extraposition over either verbs or prepositional phrases creates comprehension difficulty, and that this difficulty is consistent with probabilistic syntactic expectations estimated from corpora. Furthermore, we find that manipulating the expectation that a given noun will have a postmodifying relative clause can modulate and even neutralize the difficulty associated with extraposition. Our experiments rule out accounts based purely on derivational complexity and/or dependency locality in terms of linear positioning. Our results demonstrate that comprehenders maintain probabilistic syntactic expectations that persist beyond projective-dependency structures, and suggest that it may be possible to explain observed patterns of comprehension difficulty associated with extraposition entirely through probabilistic expectations.     

Online Cognitive Behavioural Therapy Training for Therapists: Outcomes,Acceptability, and Impact of Support

The objectives of the present study were to assess the effects of online cognitive behavioural therapy (CBT) training for therapists on measures of CBT knowledge, skills, confidence, and utilisation; to determine what differences might exist between a group supported by regular telephone contact and an independent group who undertook online training without additional support; and to determine the acceptability of CBT online training among rural and remote mental health professionals. Mental health practitioners were randomly allocated to a supported training group (six sessions of 15‐min support) or an independent group. They undertook a 12‐week online CBT training program. The two groups showed similar gains on an objective test of knowledge of CBT, and on self‐report measures of knowledge, skills, confidence levels, and utilisation of skills. However, the supported training group had a significantly higher program completion rate than the independent group. Participants evaluated the program favourably. The results suggest that online CBT training represents a promising and cost‐effective approach to training the mental health workforce, and may be particularly attractive for those who live in regional, rural, and remote communities. A challenge is to determine the most cost‐effective ways to enhance program completion rates and trainee skills.