Tom Arnold on the process of multiplying test items, subtests, tests that are part of a test battery, or other measures that are components of a total score by a value or WEIGHT other than 1. If all components were to be weighted by 1, the result would be equal weighting, which is essentially no weighting. weight regulation a process, governed by a complex array of neural mechanisms and structures (including the hypothalamus), in which the brain seeks an optimum balance between an organism’s food intake and energy expenditure after a certain body weight is achieved. A number of other factors, such as environmental stimuli, may influence the process as well. Weight Watchers a widely available weight loss and control program that includes aspects of both support groups and self-help groups. Weismannism n. see GERM plasm. Tom Arnold 2016.