Optimistic Bias Among Cigarette Smokers1

Smokers, unlike other populations engaging in risky behavior, readily acknowledge that tobacco use increases their susceptibility to smoking-related illness. This study used data from the Adult Use of Tobacco Survey to demonstrate that smokers, while acknowledging increased risk for illness, still show evidence of an optimistic bias in their perception of the hazards of their usual brand of cigarette. Optimism was assessed, first, by grouping respondents by perceived cigarette hazards (higher, lower, or about the same as others), and, second, by comparing Federal Trade Comission (FTC)-calculated and respondent-estimated cigarette tar levels. An optimistic bias was observed in all assessments. Perceived cigarette risk was not related to desire to stop smoking, if an easy way to do so were available, nor was it related to the number of previous quit attempts lasting one week or longer.     

The perception of 3-dimensional affine structure from minimal apparent motion sequences

The research described in the present article was designed to identify the minimal conditions for the visual perception of 3-dimensional structure from motion by comparing the theoretical limitations of ideal observers with the perceptual performance of actual human subjects on a variety of psychophysical tasks. The research began with a mathematical analysis, which showed that 2-frame apparent motion sequences are theoretically sufficient to distinguish between rigid and nonrigid motion and to identify structural properties of an object that remain invariant under affine transformations, but that 3 or more distinct frames are theoretically necessary to adequately specify properties of euclidean structure such as the relative 3-dimensional lengths or angles between nonparallel line segments. A series of four experiments was then performed to verify the psychological validity of this analysis. The results demonstrated that the determination of structure from motion in actual human observers may be restricted to the use of first order temporal relations, which are available within 2-frame apparent motion sequences. That is to say, the accuracy of observers' judgments did not improve in any of these experiments as the number of distinct frames in an apparent motion sequence was increased from 2 to 8, and performance on tasks involving affine structure was of an order of magnitude greater than performance on similar tasks involving euclidean structure.     

EXPERIMENTS IN A COMMUNITY MENTAL HEALTH CENTER: INCREASING CLIENT PAYMENTS FOR OUTPATIENT SERVICES

Although public health care systems often depend on revenue generated from client payment for services, inadequate agency fee payment systems continue to create substantial administrative problems. The first study examined the effects of implementing a system for producing and maintaining routine client fee payment. The second study was a replication of the first study. The Credit Criterion System was designed to: (a) allow clients to establish intra-agency credit by paying cash for each of the first three visits; and (b) pay for services monthly after credit was established. The system resulted in a baseline collection rate of 20%, compared with the Credit Criterion rate of 96.6%. The Credit Criterion System did not create additional administrative costs and it had no effect on attendance. Thus, the Credit Criterion System appears to be a reasonable set of procedures for allowing clients to meet their financial obligations to an agency.     

DESIGN OF LIVING ENVIRONMENTS FOR NURSING-HOME RESIDENTS: INCREASING PARTICIPATION IN RECREATION ACTIVITIES1

Nursing-home residents have frequently been characterized as unoccupied and disengaged. At the outset of the present study, most residents were to be found in their own rooms, not exhibiting gross motor behavior or social interaction, and not participating in appropriate activities. To modify residents' levels of participation with the environment, a manipulative area was provided in the lounge. Participation in the lounge averaged 20% on days when the activity was not available, but increased to a mean of 74% on days when equipment and materials were given and residents were prompted to participate. When prompts were withdrawn and materials were available only by request, mean participation fell to 25%. The findings demonstrate that manipulative activities can support a high level of participation with the environment, if residents are prompted to use equipment and materials.     

Simulation of curved surfaces from patterns of optical texture

Previous research on the perceptual analysis of optical texture has been severely restricted by the lack of an appropriate technique for distributing texture on curved surfaces in a uniform manner. In an effort to overcome this problem, the present article presents a new algorithm for generating stochastically regular distributions of texture on any smooth surface regardless of its curvature. We also present a new technique for representing the global organization of a textured image based on the formal concept of a projected area field.     

Social Need,Public Response: The Volunteer Professional Model for Human Services Agencies and Counselors

This article describes a model process of assessment and integration that allows community agencies and professional counselors to engage in more effective volunteer activity.     

Support systems of elders in rural communities

The social network concept can be used to guide the extension of the mental health clinician's role to the practice of prevention on the local level. A model of such work is described which builds on clinical skills in collaborative consultation with formal and informal social support networks in a community. The model is illustrated and expanded through a case example of a project in a rural New England town to address issues of stress and support for frail elders. Focusing on the social network of such elders, consultations were developed to address the needs of middle generation caregivers, natural helpers, organized community associations, general community attitudes toward aging, and the ability of the community to secure and use outside resources. Issues of community entry through natural sponsorship are reviewed and the overall process of community empowerment is emphasized as a guiding principle in work with social networks.