Alternative Time Scales and Failure Time Models

In many reliability applications, there may not be a unique plausible scale in which to measure time to failure or assess performance. This is especially the case when several measures of usage are available on each unit. For example, the age, the total number of flight hours, and the number of landings are usage measures that are often considered important in aircraft reliability. Similarly, in medical or biological applications of survival analysis there are often alternative scales (e.g., Oakes, 1995). This paper considers the definition of a "good" time scale, along with methods of determining a time scale.     

Anti-R.O.T.C. Sit-in: a Sociological Analysis*

This study compares social characteristics, political and protest activities, and the impact of social control violence on participants and nonparticipants in a sit-in ending in arrest at Kent State University. The findings show that participants are different from the nonparticipants on several variables including college major, religious preference, personal political position and parents' political position. Participants and nonparticipants were similar to one another in grade point average, financial dependence on parents, parents' total income and parents' education levels. Participants report more political and protest activities and indicate that social control violence did not “pacify” or reduce the level of their activism.     

An empirical assessment of the Above the Influence advertising campaign

This study evaluated the efficacy of Above the Influence (ATI), a national media-based health persuasion campaign to deter youth drug use. The campaign uses public service anti-drug prevention messages and targets youth between the ages of 14 and 16, a period of heightened susceptibility to peer influences. The evaluation utilized mall intercepts from geographically dispersed regions of the country. Theoretical impetus for the campaign combines elements of the theory of reasoned action (TRA), persuasion theory, and the health belief model. A series of structural equation models were tested with four randomly drawn cross-validation samples (N = 3,000). Findings suggest that awareness of ATI is associated with greater anti-drug beliefs, fewer drug use intentions, and less marijuana use. Congruent with the TRA, changes in beliefs and intentions are intermediate steps linking campaign awareness with behavior. This study provides further evidence of positive campaign effects and may strengthen reliance on mass media health persuasion campaigns as a useful adjunct to other programs targeting youth.     

Physicians' understanding of consent requirements for phase I clinical trials in cognitively impaired or highly vulnerable populations

We investigated physicians' attitudes about entering patients who cannot give informed consent or who are of a vulnerable population into clinical trials. A survey instrument asked a nationwide sample of practicing physicians about whether ten hypothetical patients could be enrolled in a phase I clinical trials. The impact of demographic variables on the number of scenarios viewed as completely or somewhat acceptable was analyzed via student's T tests or analysis of variance (ANOVA) as applicable. All significant (p<0.01) variables were entered into a multiple logistic regression model. Eighty-four percent of respondents indicated that at least one case scenario was acceptable. A majority of those who conduct clinical trials (62%), who had training in the ethics of clinical research (78%), and who sit on institutional review boards (IRBs) (83%) approved of at least one case scenario. Physicians approved of the entry of some patients who cannot give informed consent or who are of a vulnerable population into clinical trials. More effective education on the guidelines involving clinical research should be available to practicing physicians, residents, and medical students. There should also be assurance that physicians who conduct clinical trials or who sit on IRBs have the requisite knowledge about the ethics of clinical research.     

The transmission of socioeconomic status and prestige in Great Britain and the United States

We analyze male occupational attainment using separate models in which occupational level is measured by indigenous socioeconomic index (SEI) scales, indigenous prestige scales, and a common prestige scale. Other than some consistent societal differences, the SEI scales produce highly similar results in both societies. In sharp contrast, both indigenous and common prestige scales indicate a stronger relative effect of origin (compared with education) on occupation in Great Britain. The dimensions of prestige and socioeconomic status thus seem to tap different aspects of the social mobility process, and the societies differ in the transmission of prestige but not socioeconomic status.     

Realized Potential or Lost Talent: High School Variables and Bachelor's Degree Completion

This study examined how background and high school variables affected participants in either realizing their potential by completing a bachelor's degree or experiencing lost talent by not completing a bachelor's degree. A sample of participants who had demonstrated above average cognitive ability and had high postsecondary educational goals when in 8th grade was selected from the National Education Longitudinal Study of 1988 (national longitudinal data from 1988 to 2000; National Education, 2002). Several background and high school variables had strong effects on degree completion. Results were used to develop the Realized Potential or Lost Talent model. Implications for helping young people in their educational‐career development are included.     

The free triple assumption

Many impossibility results, like Arrow's Theorem, can be strengthened by using a domain constraint that is substantially weaker than the usual domain condition.