Find over 25,000 psychological definitions


excitation-transfer theory

the theory that emotional responses can be intensified by arousal from other stimuli not directly related to the stimulus that originally provoked the response. According to this theory, when a person becomes aroused physiologically, there is a subsequent period of time when the person will experience a state of residual arousal yet be unaware of it. If additional stimuli are encountered during this time, the individual may mistakenly ascribe his or her residual response from the previous stimuli to those successive stimuli. [originally proposed in 1971 by U.S. psychologist Dolf Zillmann (1935–  )]

Browse dictionary by letter

a b c d e f g h i j k l m n o p q r s t u v w x y z

Psychology term of the day

February 27th 2024

protein metabolism

protein metabolism

all the biochemical reactions involved in the manufacture and breakdown of proteins. The body makes a large variety of complex proteins from amino acids, including enzymes, antibodies, certain hormones (e.g., insulin), and structural proteins, such as keratin, collagen, and the actin and myosin molecules of muscle. Proteins are broken down into their constituent amino acids during the basic turnover of cell proteins as well as for the elimination of toxic peptides and abnormal proteins. In case of severe energy starvation, with depletion of the body’s fat reserves, protein can be broken down to provide carbon to make glucose, but this impairs normal body functions.