Weber's law An assertion that the size of a difference threshold is proportional to the intensity of the standard stimulus.
Wellness Optimal health incorporating the ability to function fully and actively over the physical, intellectual, emotional, spiritual, social, and environmental domains of health.
Wisdom Expertise in the fundamental pragmatics of life.
Within-subjects design A research design that uses each participant as his or her own control; for example, the behavior of an experimental participant before receiving treatment might be compared to his or her behavior after receiving treatment.
Working memory A memory resource that is used to accomplish tasks such as reasoning and language comprehension; consists of the phonological loop, visuospatial sketchpad, and central executive.