ACQUISITION OF SODIUM BY RATS - INTERACTION OF INNATE MECHANISMS AND LATENT LEARNING

MALE HOLTZMAN SPRAGUE-DAWLEY ALBINO RATS, ABOUT 90 DAYS OLD, TRAINED TO PRESS A LEVER FOR DISTILLED WATER OR .15-MOLE SOLUTIONS OF VARIOUS SALTS, WERE TESTED WHEN NEITHER THIRSTY NOR REWARDED. SS RECEIVING SODIUM SALTS (CHLORIDE, PHOSPHATE, OR ACETATE) DURING TRAINING BUT SODIUM DEPLETED DURING TESTING PRESSED 2-3 TIMES MORE DURING TESTING THAN (1) SS TRAINED WITH DISTILLED WATER, CALCIUM CHLORIDE, OR POTASSIUM CHLORIDE SOLUTIONS AND WERE SODIUM DEPLETED DURING TESTING, (2) SS TRAINED WITH WATER OR WITH SODIUM CHLORIDE SOLUTION BUT NOT SODIUM DEPLETED DURING TESTING, OR (3) SS TRAINED WITH SODIUM CHLORIDE SOLUTIONS AND SODIUM DEPLETED BUT REPLETED WITH SODIUM PRIOR TO TESTING. (PsycINFO Database Record (c) 2006 APA, all rights reserved). © 1968 American Psychological Association.