Handling cases requiring corrections

Handling nonresponse in surveys: analytic corrections compared with converting nonresponders.

A large health survey was combined with a simulation study to contrast the reduction in bias achieved by double sampling versus two weighting methods based on propensity scores. The survey used a census of one New York county and double sampling in six others. Propensity scores were modeled as a logistic function of demographic variables and were used in conjunction with a random uniform variat...

Two cases requiring external reinforcement in perceptual learning.

The role of external reinforcement is an issue of much debate and uncertainty in perceptual learning research. Although it is commonly acknowledged that external reinforcement, such as performance feedback, can aid in perceptual learning (M. H. Herzog & M. Fahle, 1997), there are many examples in which it is not required (K. Ball & R. Sekuler, 1987; M. Fahle, S. Edelman, & T. Poggio, 1995; A. K...

Two cases of oesophageal stricture in childhood requiring resection.

Reflux oesophagitis appears to affect principally two great groups of patients, infants on the one hand and patients of late middle age on the other. The intervening years seem to be comparatively free from the condition and it is relatively uncommon for symptoms to occur for the first time in late childhood or early adult life. An exception to this generalization is the patient who develops oe...

Additions and Corrections

Complications Requiring Cochlear Reimplantation

Introduction: Otalgia is one of the complaints which may occur at any age. The etiology of the pain may be in the ear, structures around the ear or other head and neck structures. This is caused by the complex nervous connections in the head and neck areas, the ear, the pharynx and the nose. Since understanding the etiologies of referred otalgia can help in the assessment and treatment of the ...