Before revision: Doris Kraeling and Byron Campbell conducted experiments to determine if “reduction would be more effective as a reinforcer if the initial drive were low than if the initial drive were high.” Their findings were that “changes in stimuli are more discriminable at low levels of stimulus intensity than at higher levels of stimulus intensity.” Campbell, B., Krealing, D. (1953).
After revision: Doris Kraeling and Byron Campbell conducted experiments to determine if “reduction would be more effective as a reinforcer if the initial drive were low than if the initial drive were high.” Their findings were that “changes in stimuli are more discriminable at low levels of stimulus intensity than at higher levels of stimulus intensity.” Krealing, D. (1953).