The expanded socio-psychophysiological model (SPPM) appears to provide a meaningful paradigm for explaining the psycho-psysiological effects of Social Reinforcement Systems (SRS). This model may be used to assist individuals, and the society, to become more aware of the effects that social practices have on the immediate and long-term actions of others. A social reinforcement system is operationally defined as those sociological forces, positive or negative, which influence the sociability of an individual by causing him to establish a systematic network of possible alternatives to a given social stimulus such that he may continually perceive his actions as positive reinforcements which maintain his internal security or stability. The socio-psychophysiological model is an extension of the stimulus-reaction mechanism where the multiple effect of SRS acts as the vehicle through which social behavior is conditioned. Neuro- and psycho-physiological factors are expressed as components in the internal status mechanism of the SPPM. (JM)