n. the personality type that, according to Sheldon’s constitutional theory of personality, is associated with an ectomorphic (linear, fragile) physique (see ectomorph). Cerebrotonia is characterized by a tendency toward introversion, restraint, inhibition, love of privacy and solitude, and sensitivity. —cerebrotonicadj.
any model that attempts to relate the values of an outcome or dependent variable to the explanatory or independent variables using an equation that involves exponents. Compare linear model.