Systematic Review of the Effectiveness of Allied Health Clinical Education Programs.

INTRODUCTION: Continuing allied health professional (AHP) clinical education is essential to ensure high-quality patient care; however, the effectiveness of current education programs is unclear. This review aimed to determine whether AHP education programs improve the knowledge of AHPs, change their clinical practice behavior, and/or improve patient-related clinical outcome and to identify important components of these programs. METHODS: Four electronic databases were searched. Controlled clinical trials investigating the effectiveness of clinical education programs were included. Education programs were diverse, varying in design, delivery mode, and intensity. Only therapy-specific AHPs were included. Effectiveness was determined by differences in group outcomes in the domains of AHP knowledge, AHP clinical practice behavior, and patient-related clinical outcomes. RESULTS: Forty-four studies were identified, of which 26 included physiotherapists only. Most control groups were waitlist, passive dissemination of information, or usual care, limiting comparisons between programs. Changes in AHP knowledge was investigated in 20 trials, with 13 showing an improvement. Thirty studies investigated changes in AHP clinical practice behavior, with half demonstrating a difference between groups. Seventeen studies investigated a patient-related clinical outcome, with five finding a difference between groups. Where improvements in outcomes were demonstrated, programs tended to incorporate self-selection and cater to the learner's contextual needs. DISCUSSION: AHP knowledge is effectively improved through targeted education programs. To change AHP behavior and patient outcomes, it seems important to incorporate self-selection for the program and consider the learner's individual needs and contexts through mentoring, outreach visits, reflection, and incorporating patient participation in the learning.

Nicotine enhances auditory processing in healthy and normal-hearing young adult nonsmokers.

RATIONALE: Electrophysiological studies show that systemic nicotine narrows frequency receptive fields and increases gain in neural responses to characteristic frequency stimuli. We postulated that nicotine enhances related auditory processing in humans. OBJECTIVES: The main hypothesis was that nicotine improves auditory performance. A secondary hypothesis was that the degree of nicotine-induced improvement depends on the individual's baseline performance. METHODS: Young (18-27 years old), normal-hearing nonsmokers received nicotine (Nicorette gum, 6mg) or placebo gum in a single-blind, randomized, crossover design. Subjects performed four experiments involving tone-in-noise detection, temporal gap detection, spectral ripple discrimination, and selective auditory attention before and after treatment. The perceptual differences between posttreatment nicotine and placebo conditions were measured and analyzed as a function of the pre-treatment baseline performance. RESULTS: Nicotine significantly improved performance in the more difficult tasks of tone-in-noise detection and selective attention (effect size = - 0.3) but had no effect on relatively easier tasks of temporal gap detection and spectral ripple discrimination. The two tasks showing significant nicotine effects further showed no baseline-dependent improvement. CONCLUSIONS: Nicotine improves auditory performance in difficult listening situations. The present results support future investigation of nicotine effects in clinical populations with auditory processing deficits or reduced cholinergic activation.

Central Auditory Processing of Temporal and Spectral-Variance Cues in Cochlear Implant Listeners.

Cochlear implant (CI) listeners have difficulty understanding speech in complex listening environments. This deficit is thought to be largely due to peripheral encoding problems arising from current spread, which results in wide peripheral filters. In normal hearing (NH) listeners, central processing contributes to segregation of speech from competing sounds. We tested the hypothesis that basic central processing abilities are retained in post-lingually deaf CI listeners, but processing is hampered by degraded input from the periphery. In eight CI listeners, we measured auditory nerve compound action potentials to characterize peripheral filters. Then, we measured psychophysical detection thresholds in the presence of multi-electrode maskers placed either inside (peripheral masking) or outside (central masking) the peripheral filter. This was intended to distinguish peripheral from central contributions to signal detection. Introduction of temporal asynchrony between the signal and masker improved signal detection in both peripheral and central masking conditions for all CI listeners. Randomly varying components of the masker created spectral-variance cues, which seemed to benefit only two out of eight CI listeners. Contrastingly, the spectral-variance cues improved signal detection in all five NH listeners who listened to our CI simulation. Together these results indicate that widened peripheral filters significantly hamper central processing of spectral-variance cues but not of temporal cues in post-lingually deaf CI listeners. As indicated by two CI listeners in our study, however, post-lingually deaf CI listeners may retain some central processing abilities similar to NH listeners.