Therapists' self-practice of CBT

This study investigated the prevalence of voluntary self-practice of Cognitive Behaviour Therapy (CBT) by accredited CBT practitioners, and explored the ability of the Theory of Planned Behaviour (TPB) to predict intentions to engage in CBT self-practice. A TPB questionnaire was constructed by implementing the protocol devised by Francis et al. (2004), with content specific items generated from an elicitation exercise to obtain salient beliefs regarding CBT self-practice. A sample of 177 accredited CBT practitioners completed an online survey which included demographic items and the TPB questionnaire. It was found that 46.4% of participants intended to self-practice CBT more than once a week over the following month. While the TPB predicted intentions to self-practice CBT (R2 = .445, p < .001), structural equation modeling revealed that the theory of reasoned action (R2 = .473, p < .001) was the best model fit of the observed data (RMSEA = .00, CFI = 1.00). It was concluded that a substantial proportion of CBT practitioners intended to regularly engage in CBT self-practice, with intentions predicted by subjective normative beliefs and attitudes towards the behaviour. Implications are discussed, with calls for the study to be replicated. Potential future research is considered, with suggestions to explore the role of CBT self-practice to promote therapist wellbeing

Electronic Transport at Low Temperatures: Diagrammatic Approach

We prove that a diagrammatic evaluation of the Kubo formula for the electronic transport conductivity due the exchange of bosonic excitations, in the usual conserving ladder approximation, yields a result consistent with the Boltzmann equation. In particular, we show that an uncontrolled approximation that has been used to solve the integral equation for the vertex function is unnecessary. An exact solution of the integral equation yields the same asymptotic low-temperature behavior as the approximate one, albeit with a different prefactor, and agrees with the temperature dependence of the Boltzmann solution. Examples considered are electron scattering from acoustic phonons, and from helimagnons in helimagnets.Comment: Submitted to Physics E (FMQT08 Proceedings). Requires Elsevier style file (included

Transport properties of clean and disordered superconductors in matrix field theory

A comprehensive field theory is developed for superconductors with quenched disorder. We first show that the matrix field theory, used previously to describe a disordered Fermi liquid and a disordered itinerant ferromagnet, also has a saddle-point solution that describes a disordered superconductor. A general gap equation is obtained. We then expand about the saddle point to Gaussian order to explicitly obtain the physical correlation functions. The ultrasonic attenuation, number density susceptibility, spin density susceptibility and the electrical conductivity are used as examples. Results in the clean limit and in the disordered case are discussed respectively. This formalism is expected to be a powerful tool to study the quantum phase transitions between the normal metal state and the superconductor state.Comment: 9 page

Quantum ferromagnetic transition in disordered itinerant electron systems

An effective field theory is derived for the ferromagnetic transition of diffusive electrons at T=0. The static disorder which leads to diffusive electron dynamics induces an effective long-range interaction between the spins of the form 1/r^(2d-2). This leads to unusual scaling behavior at the quantum critical point, which is determined exactly. The crossover from this quantum fixed point to the classical Heisenberg fixed point should be observable in ferromagnetic materials with low Curie temperatures.Comment: 4pp, REVTeX, no figs, final version as publishe