Voluntary acts are preceded by electrophysiological (RPs). With spontaneous acts involving no preplanning, the main negative RP shift begins at about200 ms. Control experiments, in which a skin stimulus was timed (S), helped evaluate each subject's error in reporting the clock times for awareness of any perceived event.

Exploring the relevance of biological discovery to philosophical topics such as perception, freedom, determinism, and ethical values, J.Z. Young's provocative book illuminates the significant links between these philosophical concepts and recent developments in biology and the neurosciences. In clear-cut language, Young describes the brain and its functions, examining questions concerning physical makeup versus "real" self, the awareness of our moral sense, and how human consciousness differs from that of other animals. He approaches perception not as a passive process but as (...) an active search for information, suggesting that human knowledge develops from a special process--essential to all organisms--of gathering information for survival. (shrink)

This study examines the relationship between thought and language by considering the views of Kant and the later Wittgenstein along with many strands of contemporary debate in the area of mental content. Building on an analysis of the nature of concepts and conceptions of objects, Gillett provides an account of psychological explanation and the subject of experience, offers a novel perspective on mental representation and linguistic meaning, looks at the difficult topics of cognitive roles and singular thought, and concludes with (...) an outline of certain considerations relevant to skeptical arguments and the nature of perception. The resulting synthesis demonstrates interesting correlations with current work in cognitive and developmental psychology, and is directly relevant to continuing work in epistemology, philosophy of mind, and philosophical psychology. (shrink)