Probe (No Reward) (video) Johns Hopkins University Share Print E-Mail Loading video... Caption On this early day in learning, researchers then played the same 'target' and 'foil' tones but without a lick tube present. Surprisingly, mice licked to the target tone and not to the foil tone with >90% accuracy. Credit The Johns Hopkins University/Kuchibhotla Lab Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.