Some anatomical and physiological aspects of anal sexual practices

Anal manipulation and penetration produce stimulation enjoyed as sexual by some people. Although this type of sexual activity is not new, the current social climate of sexual freedom and experimentation has brought it out into the open. This paper reviews some of the anatomical, physiological, and behavioral aspects of this variation of human sexual gratification, and provides the practicing professional, who has to deal with questions on anal sexuality, with information on the subject and suitable background material and literature references for further study.     

ADAPTING TO DEPRIVATION: AN EXAMINATION OF INFLATED EDUCATIONAL EXPECTATIONS

Many researchers argue that lower-class individuals adapt to their deprivation by lowering their aspirations for success. Data provide only limited support for this position, however, and suggest that many lower-class individuals continue to hold high aspirations. This article points to a second method of adapting to deprivation: raising expectations for success to inflated levels—levels that have a low probability of realization. The extent and determinants of inflated educational expectations are explored using data from a national, longitudinal survey of high school seniors. Results indicate that almost half of all deprived individuals with high aspirations have inflated expectations. The primary determinants of inflated expectations appear to be pressure to attend college and the overestimation of one's abilities. These data are relevant to anomie or strain theories of deviance and social structure and personality.     

The firm and managerial misdirection of worker effort

This article models how a level of management between workers and the owner of a firm can affect the owner's decision either to internally integrate a function to make inputs or to contract out to buy inputs from an independent supplier. In the model, a self-serving manager can direct her workers to perform activities that serve her interests rather than those of the firm. This reduces the effectiveness of worker performance incentives intended to promote efforts that benefit the owner. Incentives may have to be increased to a level such that the owner prefers to buy inputs rather than make them internally.     

Market stability: backward-bending supply in a laboratory experimental market. 1999 Presidential address Western Economic Association

This article investigates the stability properties of markets with backward-bending supply curves. Parameters are chosen so that the two classic models of price dynamics, the Walrasian model and the Marshallian model, give opposite predictions. The results are (1) market instability can be observed, and (2) in the backward-bending case stability is captured by the Walrasian model and the Marshallian model of dynamics is rejected. Previous experiments have demonstrated that the Marshallian model works in the forward-falling case. Thus, which theory of dynamics is appropriate for a market depends on the underlying reasons for demand and supply shapes.     

Contraceptive Method Choice Among Young Adults: Influence of Individual and Relationship Factors

Because decisions related to contraceptive behavior are often made by young adults in the context of specific relationships, the relational context likely influences use of contraceptives. Data presented here are from in-person structured interviews with 536 Black, Hispanic, and White young adults from East Los Angeles, California. We collected partner-specific relational and contraceptive data on all sexual partnerships for each individual, on four occasions, over one year. Using three-level multinomial logistic regression models, we examined individual and relationship factors predictive of contraceptive use. Results indicated that both individual and relationship factors predicted contraceptive use, but factors varied by method. Participants reporting greater perceived partner exclusivity and relationship commitment were more likely to use hormonal/long-acting methods only or a less effective method/no method versus condoms only. Those with greater participation in sexual decision making were more likely to use any method over a less effective method/no method and were more likely to use condoms only or dual methods versus a hormonal/long-acting method only. In addition, for women only, those who reported greater relationship commitment were more likely to use hormonal/long-acting methods or a less effective method/no method versus a dual method. In summary, interactive relationship qualities and dynamics (commitment and sexual decision making) significantly predicted contraceptive use.     

The Work Ethnic and Delinquency

Abstract

Many criminologists argue that delinquency stems, in part, from the abandonment of the work ethnic by adolescents. No longer willing to engage in hard work and self-denial, adolescents become more likely to engage in delinquency. Using longitudinal data from a national survey of adolescent boys, this study found that adolescents with a low commitment to the work ethic were more likely to become delinquent. The effect of the work ethic was explained, in large part, by social control and cultural deviance theory. The implications of these findings are briefly examined.     

A Comparison of Pyramidal Staff Training and Direct Staff Training in Community-Based Day Programs

This study evaluated two methods of training staff who were working with individuals with developmental disabilities: pyramidal training and consultant-led training. In the pyramidal training, supervisors were trained in the principles of applied behavior analysis (ABA) and in delivering feedback. The supervisors then trained their direct-care staff and, subsequently, provided ongoing performance feedback. In the consultant-led training, the direct-care staff was trained in the principles of ABA. Both groups learned similar amounts of knowledge of ABA principles, but pyramidal training was more effective in teaching staff to use correct teaching procedures with consumers. In addition, the pyramidal training group maintained the improvement in their teaching procedures at a 3-month follow up, while the consultant-led training group's performance declined.     

Social Class and Success Goals: An Examination of Relative and Absolute Aspirations*

Aspirations may be measured in absolute terms, by asking individuals how much of a given goal they desire, or in relative terms, by asking individuals how much they desire a given goal relative to other goals . Prior studies on the relationship between social class and success goals have always employed either relative or absolute measures alone, with the absolute measures focusing on desire for education, occupational prestige, or income and the relative measures usually focusing on such goals as job security, advancement, and importance. This paper argues that a focus on absolute or relative aspirations alone can produce a misleading image of the relationship between social class and success goals, and it remedies the above neglect by examining the absolute and relative aspirations of different social classes for the same, set of goals. Using a sample of males from Detroit and Baltimore, it was found that the lower class places more emphasis on economic security, while the upper class places more emphasis on self-actualization goals like job advancement and importance. However, when absolute aspirations were examined, it was found that lower-class people have a strong desire for self-actualization and that middle-class people do not have a strong desire for security. These findings provide a more complete picture of the relationship between social class and success goals, and they are relevant to such topics as Rodman's "lower-class value stretch." social mobility, anomie theories of deviance, and explanations of social movements based on relative deprivation.     

Effects of physical and mental demands on shoulder muscle fatigue

Mental demands have been associated with increased risk of injuries; however, its influence on muscle fatigability remains unclear. The aim of this study was to investigate the interaction of mental workload and physical workload on muscle fatigability during repetitive shoulder work. Twelve young participants, balanced by gender, performed shoulder abduction exercises until exhaustions at three levels of physical workload (low (5% maximum voluntary contraction (MVC)), moderate (35% MVC), and high (55% MVC)) in the absence and presence of a mental arithmetic test. Endurance time and rate of strength decline were employed as indicators of muscle fatigue. Concurrent physical and mental processing was found to adversely decrease muscle endurance by ~25% at the moderate intensity level. Furthermore, concurrent demands were associated with faster rate of strength decline compared to the control, irrespective of the physical intensity level. Findings from the current study provide evidence of the adverse effects of mental workload on muscle capacity (i.e., endurance and fatigue). It is therefore important to consider potential changes in worker capacity with concurrent physical and cognitive demands before designing work tasks/products.