Michael Tooley and the Jolly Nasty Conclusion

Abstract Some recent powerful and persuasive arguments seem to imply that a world of people with lives that are barely worth living is preferable to a world which contains fewer people all of whom have extremely satisfying lives. This ‘repugnant conclusion’ is clearly to be rejected if possible—but is it possible? Many attempts to reject or avoid it have failed. One of the latest, by Michael Tooley, looked promising but the present essay argues that this attempt has also failed.     

A REASSESSMENT OF STATISTICAL POWER ANALYSIS IN HUMAN COMMUNICATION RESEARCH

This study conducted a statistical power analysis of 64 articles appearing in the first four volumes of Human Communication Research, 1974–1978. Each article was examined, using Cohen's revised handbook, assuming nondirectional null hypotheses and an alpha level of .05. Statistical power, the probability of rejecting a false null hypothesis, was calculated for small, medium, and large experimental effect sizes and averaged by article and volume. Results indicated that the average probability of beta errors appears to have decreased over time, providing a greater chance of rejecting false null hypotheses, but this also raised several power-related issues relevant to communication research in general.