SUPERVENIENCE, DETERMINATION, AND DEPENDENCE

Abstract:   I show how existing concepts of supervenience relate to two more fundamental ontological relations: determination and dependence. Determination says that the supervenient properties of a thing are a function of its base properties, while dependence says that having a supervenient property implies having a base property. I show that most varieties of supervenience are either determination relations or determination relations conjoined with dependence relations. In the process of unpacking these connections I identify limitations of existing concepts of supervenience and provide ways of overcoming them. What results is a more precise, flexible, and powerful set of tools for relating sets of properties than current concepts of supervenience provide. I apply these tools to a recalcitrant problem in the physicalism literature – the problem of extras.     

NATURAL RHETORIC AND THE PRAXIS OF UNDERSTANDING

Although rhetoric might be thought of as nothing more than an archaic art of manipulation, its ability to bring about action—particularly as the intellect and will engage in acts of persuasion amid the operations of the practical intellect—is a possibility that has gone largely unnoticed among philosophers of human nature. In this paper I explore the possibility that natural rhetoric, much as it serves the practical intellect in precipitating action, serves the speculative intellect as it stimulates acts of cognizing and understanding, thus leading to the acquisition of knowledge.     

MASS COMMUNICATION AND BELIEF CHANGE: A TEST OF THREE MATHEMATICAL MODELS

Three mathematical models of communication and belief change were proposed and tested: a proportional change model, a belief certainty model, and an accumulated information model. A quick correlational check of the three models suggested that the accumulated information model was the superior with the belief certainty model being the most inferior of the three. Stronger support for the accumulated information model obtained using a more stringent test: a nonlinear bivariate regression which produced visual “plots” of empirical data that nearly duplicated the visual “plots” produced by the theoretical model. The accumulated information model states that belief change is proportional to the discrepancy between the original belief and the belief communicated in the message, and inversely proportional to the amount of information which the receiver has about the topic at the time the message is received. The belief certainty model was the most inferior of the three indicating that the degree to which a receiver is certain in conviction is unrelated to the communication-belief change relationship.     

AN EMPIRICAL ASSESSMENT OF DATA COLLECTION USING THE INTERNET

Identical questionnaire items were used to gather data from 2 samples of employees. One sample ( n = 50) responded to a survey implemented on the World Wide Web. Another sample ( n = 181) filled out a paper version of the survey. Analyses of the 2 data sets supported an exploration of the viability of World Wide Web data collection. The World Wide Web data had fewer missing values than the paper and pencil data. A covariance analysis simultaneously conducted in both samples indicated similar covariance structures among the tested variables. The costs and benefits of using access controls to improve sampling are discussed. Four applications that do not require such access controls are discussed.