Increasingly, evidence suggests that computerized Cognitive Behavioural Therapy (cCBT) is effective at reducing adolescent anxiety and depression for young people in the general population or those ‘at risk’. However, less is known about the acceptability, feasibility and effectiveness of cCBT for adolescents with clinically significant levels of impairment. This study aimed to investigate the feasibility of using a novel cCBT intervention, ‘Pesky gNATs’, with adolescents aged between 13–18 years with anxiety and/or depression who met the criteria for specialist mental health services. Eleven participants were recruited from a Tier 3 child and adolescent mental health service (CAMHS). Recruitment, attendance and retention rates were recorded and qualitative feedback about the benefits and disadvantages of completing cCBT were obtained during the final session. In addition, a number of outcome measures were completed pre- and post- intervention to assess reliable and clinically significant change. The intervention was very brief comprising of just seven sessions. Participants showed high recruitment and retention rates. All participants who started the intervention completed it. All described the programme as useful and the majority identified several benefits. Four of 11 participants demonstrated reliable reductions in symptoms of depression and anxiety and six of 11 showed decreases in parent-reported symptoms of anxiety and depression following the seven-session intervention. This study demonstrates the acceptability and feasibility of using cCBT in a Tier 3 CAMHS setting. Further research is required to investigate the effect of Pesky gNATs on anxiety and depression in other Tier 3 settings.

There is a puzzling asymmetry in English with respect to free relative clauses introduced by what and who, with the former (e.g. [What Glenn said] didn't make much sense) intuitively being much more acceptable than the latter (e.g. [Who Glenn married] didn't make much money). In this squib, we explore this degraded acceptability of who free relative clauses, and from the results of an experimental study we identify syntactic features of the sentence that influence the level of acceptability. We discuss the difficulty in finding an independently motivated solution to the puzzling asymmetry within current theories of syntax, semantic and processing. Finally, we touch on a broader theoretical question relating to the robust cross-linguistic process by which elements of the set of wh-words in a language are able to extend their function from introducing interrogative clauses to introducing other clausal constructions.

Third-order nonlinear optical properties of lyotropic liquid crystal poly(1,4-phenylene-2,6-benzobisthiazole), PBT, solutions are studied by third harmonic generation measurements. Besides the enhancement observed for this coefficient with respect to the pure PBT, coupling is observed between the mean filed nematic director n and the incident fundamental polarization B0. Different geometries, with respect to the relative orientation of B0 and n, provided different harmonic Maker Fringe Patterns. These data are compared using refractive index measurements, independently achieved on these materials, and necessary for Maker Fringe analysis.