Over the past hundred years, a number of scientific investigators claim to have adduced experimental evidence for phenomena information” seems to behave like a weak signal that has to compete for the information-processing resources of the organism, a reduction of ongoing sensorimotor activity may facilitate ESP detection. Such a meaningful convergence of results suggests that psi phenomena may represent a unitary, coherent process whose nature and compatibility with current physical theory have yet to be determined. The theoretical implications and potential (...) practical applications of psi could be significant, irrespective of the small magnitude of psi effects in laboratory settings. (shrink)

Subjective Bayesianism is a major school of uncertain reasoning and statistical inference. It is often criticized for a lack of objectivity: it opens the door to the influence of values and biases, evidence judgments can vary substantially between scientists, it is not suited for informing policy decisions. My paper rebuts these concerns by connecting the debates on scientific objectivity and statistical method. First, I show that the above concerns arise equally for standard frequentist inference with null hypothesis significance tests. Second, (...) the criticisms are based on specific senses of objectivity with unclear epistemic value. Third, I show that Subjective Bayesianism promotes other, epistemically relevant senses of scientific objectivity—most notably by increasing the transparency of scientific reasoning. (shrink)

In this article we study how reported speech markers are used as procedural resources in a laboratory based parapsychology experiment to investigate forms of anomalous communication, such as extrasensory perception. In particular, we focus on how specific activities in a key part of the experiment are mediated by the use of `you said' formulations which project that whatever is said next is a paraphrase or a verbatim report of what the recipient had said earlier. We identify two uses of reported (...) speech markers. First, they are used in utterances that initiate some form of repair, such as correction or clarification. Second, they cluster in sequential locations that mark, after a temporary suspension, the resumption of key activities in the experiment. In this we hope to contribute to the study of the institutional properties of reported speech. We conclude by discussing the ways in which broader cultural understandings of the inferential force of `you said' formulations inform their use in this institutional setting, and reflecting on the significance of these findings for parapsychological investigation of anomalous communication in this setting. (shrink)

Jednou z hlavních námitek proti parapsychologii je, že její experimenty nejsou replikovatelné. Z diskuse mezi obhájci a kritiky tohoto oboru však vysvítá, že obě strany chápou požadavek replikace odlišným způsobem. Na základě sporu o parapsychologii lze rozlišit několik typů replikace – statistickou replikaci, krátkodobě a dlouhodobě spolehlivou replikaci, dva typy nezávislé replikace, retrospektivní a prospektivní replikaci. Bez explicitního rozlišování těchto různých kritérií nelze o problému parapsychologie konstruktivně diskutovat.

I address some specific problems in the two target articles offered here (Rao and Palmer/Alcock: Parapsychology review and critique), which are indicative of more general problems that plague the larger debate. Because such problems are rather typical of scientific conflict, I address general problems of assessment in a second section. In a final section. I make some comments about the future of this debate.

This paper presents a brief review of the debate between parapsychologists and skeptics regarding the issue of replication in experimental tests of extrasensory perception (ESP) using a sensory reduction technique known as ganzfeld. The review is followed by a basic assessment of 59 ganzfeld ESP studies reported in the period following the publication of a stringent set of methodological guidelines and recommendations by R. Hyman and C. Honorton in 1986. The assessment indicates that these 59 studies have a combined hit (...) rate of approximately 30%, which is significantly above the chance expected hit rate of 25%. A comparison of the hit rates across four ganzfeld meta-analyses, as well as across fifteen laboratories, seems to further indicate replication of the ganzfeld ESP effect by a broad group of independent researchers. Keywords: extrasensory perception (ESP)—ganzfeld—meta-analysis—psi—parapsychology. (shrink)