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Biomedical subjects

D W Schafer

Publications and source records attributed to D W Schafer.

9 recordsLinked to original sources
PubMed1992

Alternating unilateral lachrymation.

A 56-year-old woman displayed a condition of alternating unilateral lachrymation while she was undergoing psychotherapy. Although she was aware of this condition only since her marriage, hypnotic age regression revealed its existence in childhood, together with mutism and a catatonic trance-like state. Further investigation revealed the connection of this symptom with her family constellation and the reappearance of the unilateral crying as an adult. In this paper we review the neurophysiology of lachrymation, discuss the hypnosis sessions, discuss the symptom as a psychosomatic condition and as a dissociative phenomenon, and present a case report of her background.

Crying↗
PubMed1989

A measurement-error model for binary and ordinal regression.

Exposure assessment poses special problems in air pollution epidemiology. This paper proposes a probit regression model for binary and ordinal outcomes that uses exposure validation information to develop estimates for the coefficient of the true exposure when only the inaccurate 'surrogate' measure of exposure is available for the individuals in the health study. This method is closely related to recently developed measurement-error methods, and is based on the assumption that the outcome and the surrogate exposure are conditionally independent given the true exposure. A test statistic is proposed for checking this conditional independence assumption when more than one surrogate is available, and an interpretation of the coefficient estimate is provided in the event that the assumption is violated. The methods are applied to an example involving nitrogen dioxide exposure and wheeze in children.

Air Pollution↗
PubMed1986

Recognizing multiple personality patients.

As shown by increased frequency of articles on multiple personality patients, this disorder is seen or recognized more than before. This paper describes the finer points of this syndrome that might help in making a correct diagnosis.

Child Abuse↗