Henry Pennypacker

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Clinical breast examination (CBE) seeks to detect breast abnormalities or evaluate patient reports of symptoms to find palpable breast cancers at an earlier stage of progression. Treatment options for earlier-stage cancers are generally more numerous, include less toxic alternatives, and are usually more effective than treatments for later-stage cancers.(More)
Two experiments were conducted to assess the relative thoroughness of three search patterns for breast self-examination (BSE). Experiment 1 compared the commonly taught concentric circles (CC) pattern to a new pattern composed of vertical strips (VS). Experiment 2 compared a radial spoke (RS) pattern to the VS pattern. Twenty-eight female subjects(More)
The professional practice of clinical breast examination (CBE) is a crucial element in early detection of neoplasms, but it is often compromised by insufficient formal training and conflicting demands on professional time. From an extensive research base, a training technology has been developed which generates highly proficient CBE. This technology is(More)
Food rumination is a maladaptive, life-threatening behavior observed among infants and institutional populations for the mentally retarded. Differential reinforcement of other behaviors (IRT greater than N) was experimentally studied as a method of reducing his behavior. Two mentally retarded clients emitted reduced rumination behaviors after implementation(More)
Application flows naturally from good science, and behavioral toxicology is no exception. Phenomena discovered and procedures developed in behavioral laboratories are being applied on a wide scale in commercial, industrial, and governmental settings. In behavioral toxicology, this transfer of technology has occurred in an ad hoc manner, albeit with a degree(More)
Seventy-six students in a college-level course in human development were divided into an experimental and a control group of approximately equal size. Both groups were given a pretest composed of fill-in and multiple-choice items. The control group was exposed to conventional educational practices while the experimental group was treated in a manner similar(More)