Nonverbal cues employed in discriminating between disabled persons and actors

Undergraduate subjects were seen to accurately discriminate between simulating actors and genuinely disabled males confined to wheelchairs. Judgments were based on skill in manipulating the wheelchair, poorer muscular development of the disabled, and on appearance of clothing. Implications for research on the disabled employing actors was discussed.This study was supported by a grant from the York University Faculty of Arts awarded to the first two authors. The project was performed as the third author's Honours thesis. The authors wish to thank all participants for their cooperation and assistance in making this research possible. The authors also wish to thank Gail Kenyon, Coordinator of the Centre for Handicapped Students who helped recruit participants for the videotaping and to Lucie Cantrell, Executive Officer of the York University Counselling and Development Centre who arranged for the use of the Centre's facilities and equipment.     

Assumptions of social mobility research in the U.S.: The case of occupational status

This paper examines the theoretical and empirical basis for common rank-orderings of occupational roles by raters throughout the world. From an illustrative comparison of occupational stratification in Australia and the United States we conclude tentatively that (1) commonalities in the socioeconomic characteristics of occupational roles provide the basis for interplace consistencies in “prestige” scores, (2) the structure of occupational mobility in the U.S. and Australia is largely similar, (3) this similar structure of occupational stratification manifests a common socioeconomic process which defines a (the?) major component of occupational mobility in capitalist, industrial (only?) societies. We infer that “prestige” scores for occupations are fallible estimates of the socioeconomic statuses of occupation, within the context of mobility processes in (at least) the U.S. and Australia.     

Court decisions hold implications for managed care plans--Part one

The managed care industry--and HMOs in particular--is now facing the realities of a maturing business. Maturity has brought a competitive tension to the HMO/managed care field, one consequence of which is increased litigation, not only among HMOs but also between HMOs and their suppliers, customers, and indemnity insurers. Entanglement in the legal system is an outgrowth of efforts to gain or preserve a competitive edge, reduce costs, and attract customers. This article highlights selected legal developments from the past two years that reflect the causes and effects of this environment. Additional cases will be discussed in the March-April 1990 issue of the journal.     

Contiguity of Probability Measures

The notion of contiguity of probability measures is a very useful one, providing a generally applicable method of calculating the asymptotic power of a sequence of tests and thus a means of comparing competing tests. This paper attempts to give an account of the basic results of contiguity theory which is self-contained and accessible to statisticians to whom the theory is of use. In addition, the relationship between contiguity and mutual contiguity is explored.     

Comparative Potency Method for Cancer Risk Assessment: Application to Diesel Particulate Emissions1

An estimation of the human lung cancer “unit risk” from diesel engine particulate emissions has been made using a comparative potency approach. This approach involves evaluating the tumorigenic and mutagenic potencies of the particulates from four diesel and one gasoline engine in relation to other combustion and pyrolysis products (coke oven, roofing tar, and cigarette smoke) that cause lung cancer in humans. The unit cancer risk is predicated on the linear nonthreshold extrapolation model and is the individual lifetime excess lung cancer risk from continuous exposure to 1 μg carcinogen per m³ inhaled air. The human lung cancer unit risks obtained from the epidemiologic data for coke oven workers, roofing tar applicators, and cigarette smokers were, respectively, 9.3 × 10^?4, 3.6 × 10^?4, and 2.2 × 10^?6 per μg particulate organics per m³ air. The comparative potencies of these three materials and the diesel and gasoline engine exhaust particulates (as organic extracts) were evaluated by in vivo tumorigenicity bioassays involving skin initiation and skin carcinogenicity in SENCAR mice and by the in vitro bioassays that proved suitable for this analysis: Ames Salmonella microsome bioassay, L5178Y mouse lymphoma cell mutagenesis bioassay, and sister chromatid exchange bioassay in Chinese hamster ovary cells. The relative potencies of the coke oven, roofing tar, and cigarette smoke emissions, as determined by the mouse skin initiation assay, were within a factor of 2 of those determined using the epidemiologic data. The relative potencies, from the in vitro bioassays as compared to the human data, were similar for coke oven and roofing tar, but for the cigarette smoke condensate the in vitro tests predicted a higher relative potency. The mouse skin initiation bioassay was used to determine the unit lung cancer risk for the most potent of the diesel emissions. Based on comparisons with coke oven, roofing tar, and cigarette smoke, the unit cancer risk averaged 4.4 × 10^?4. The unit lung cancer risks for the other, less potent motor-vehicle emissions were determined from their comparative potencies relative to the most potent diesel using three in vitro bioassays. There was a high correlation between the in vitro and in vivo bioassays in their responses to the engine exhaust particulate extracts. The unit lung cancer risk per μg particulates per m³ for the automotive diesel and gasoline exhaust particulates ranged from 0.20 × 10^?4 to 0.60 × 10^?4; that for the heavy-duty diesel engine was 0.02 × 10^?4. These unit risks provide the basis for a future assessment of human lung cancer risks when combined with human population exposure to automotive emissions.     

Vertical mobility and community type as factors in the migration of college graduates

Internal migration statistics are generally inadequate. One of the chief sources of this is the lack of direct data relating to migration. There appears also to be a lack of interest on the part of researchers in pursuing the study of the relationship between vertical mobility and migration. This study is designed to determine the relative importance of intergenerational vertical mobility and type of community or place of origin in contributing to the migration of college graduates by using direct mobility and migration data.The study sample consists of 850 employed male graduates of eight private colleges in Iowa between 1954 and 1958. Data were obtained through the colleges and consist, among other things, of information about fathers' occupations, graduates' occupations, and the addresses of graduates both at matriculation and at the time of the study. Information about communities or places of origin is dichotomized on the basis of whether they are located in Standard Metropolitan Areas (SMA's) in 1950 or whether they are located in non-SMA's (NSMA's). Upward mobility is treated as a product of higher education and as an antecedent of migration.Hypotheses asserting the existence of associations between mobility and migration and between type of community or place of origin and migration are tested. Associations are established showing (1) that upwardly mobile graduates are more likely to migrate than others and (2) that graduates from NSMA's are more likely to migrate than graduates from SMA's.The relative influence of the two factors is determined by partialing the associations between each factor and migration while holding the other factor constant. Type of community or place of origin is found to be of greater importance for migration than is upward mobility. Graduates from NSMA's are more likely to migrate than those from SMA's, regardless of their relative mobility. Graduates from SMA's are likely to migrate only if they are also upwardly mobile.     

The disengagement process: A neglected problem in participant observation research

Of the various phases or stages of participant observation, the disengagement process has typically been glossed over in methodological discussions of qualitative research. Drawing on the author's fieldwork experience and on the scattered references to disengagement in the ethnographic literature, this paper systematically outlines and examines the problems and issues associated with this neglected phase of the fieldwork process. Three interrelated questions or issues structure the inquiry. The first deals with the problem of informational sufficiency and its relation to closure; the second with the various precipitants of disengagement; and the third with the factors that can function as barriers or impediments to disengagement.For their critical and helpful comments on an earlier version of this paper, I wish to thank Gideon Sjoberg, Sheldon Olson, and Ben Blount.     

Family Therapy with the Learning Disabled Child and His/Her Family

No therapist can come in contact with and treat children with minimal brain damage or specific learning disabilities without being struck by the fact that there are numerous intertwined factors that have contributed to and continue to perpetuate the problems. In addition to the helping approaches which have been utilized in recent years, such as tutoring, special education, and child therapy, this article elaborates the importance of utilizing family therapy as the treatment of choice sometime during the course of treating the child and helping the parents to understand and deal with their handicapped youngster.