Asymptotic log-linear analysis: some cautions concerning sparse frequency tables

Traditional asymptotic probability values resulting from log-linear analyses of sparse frequency tables are often much too large. Asymptotic probability values for chi-squared and likelihood-ratio statistics are compared to nonasymptotic and exact probability values for selected log-linear models. The asymptotic probability values are all too often substantially larger than the exact probability values for the analysis of sparse frequency tables. An exact nondirectional permutation method is presented to analyze combined independent multinomial distributions. Exact nondirectional permutation methods to analyze hypergeometric distributions associated with r-way frequency tables are confined to r = 2.     

Some mathematical remarks concerning boundary conditions in the factorial analysis of ability

This paper is a mathematical supplement to the preceding paper by Professor Godfrey H. Thomson. It gives rigorous proofs of theorems enunciated by him and by Dr. J. Ridley Thompson, and extends them. Its basic theorem is that if a matrix of correlations is to be factorized without the aid of higher factors thans-factors (withn-s zero loadings), then the largest latent root of the matrix must not exceed the sum of thes largest communalities on the diagonal.     

Testing models of the redundant-signals effect: A warning concerning the combination-rule regression analysis

The redundant-signals effect is the observed RT advantage for trials presenting two or more targets, as compared with trials with only one target Two general classes of parallel-processing model have been proposed to explain this effect race models (e.g., Raab, 1962) and coactivation models (e.g., Miller, 1982). Various distributional analyses have been used in work aimed at discriminating between these two model classes. The present study reexamined one of these tests—the combination-rule regression analysis based on variable-criterion theory (Grice, Canham, & Boroughs, 1984)—by applying it to the data from two sets of simulated experiments. One set of simulations assumed coactivation; the other set assumed an independent race on redundant-target trials. Nearly identical combination-rule values were observed in the two sets of simulations. This finding shows that the combination rule of variable-criterion theory does not discriminate between models capable of explaining the redundant-signals effect The implications of this finding are briefly discussed     

Myth-conceptions concerning death-related behavior

Summary The discussion here has suggested that it is likely that the following beliefs are myth conceptions: Living is always prefarable to dying. It is possible for people not to play God. We can be sure that what happens biologically is willed by God. God speaks to us only through our biology. Dying occurs only at one point in time-at the end of the terminal period. Death or dead are more accurate labels than passed on. Persons who are dying know without being told that they are dying. Biological death is the most important thing happening when a person dies.The goal of achieving understanding of our death-related behavior can be facilitated by recognition of myth-conceptions such as these and the previously identified myths the acceptance of which may have an impact upon both biological and mental or spiritual health of those involved.He is the author ofSociology of Death and other books and articles.     

The Good Professor

This paper seeks to provide a philosophical analysis of the features of an excellent professor, but a well-balanced one, professionally speaking. What makes for excellence in research, teaching and service is explored in some detail, with attention paid to the contexts of four-year colleges and comprehensive universities in the united states.     

Issues concerning collaborating careers

Male and female college students responded to stories about married physicians whose total income was greatest, respectively, when (1) the husband cared for the children, (2) the wife cared for the children, (3) either spouse cared for them, (4) the wife earned more than the husband, or (5) the husband earned more than the wife. A strong bias in favor of maternal child care was found in situations (2) and (3), while in situation (1) a majority of females favored paternal child care and males chose father and mother about equally. No aversion to the wife's earning more than the husband was found. The results were discussed in terms of their relevance to collaborating careers.