The essays in this volume 9 of a series inform readers of the present status of leading issues in parapsychology (or psi research). The authors are experts in their fields and have written in a reader-friendly way that captures the complexity and importance of their topics. Each essay comprehensively reviews a controversial topic from a critical stance, and updates its status based on the latest theoretical and empirical considerations. For readers who need to keep pace with the evolution of thinking in psi research, this volume is authoritative. The series as a whole has traced the...