Schneider A M, Sherman W
Science. 1968 Jan 12;159(3811):219-21. doi: 10.1126/science.159.3811.219.
When rats received a brief footshock upon stepping off an elevated platform, and an electroconvulsive shock 30 seconds or 6 hours afterward, amnesia was not observed 24 hours later. If a second footshock (noncontingent) was delivered 0.5 second before the electroconvulsive shock, amnesia was observed. The amnesia was temporary if conditioning was strong and permanent if conditioning was weak.
当大鼠从高架平台上跳下时受到短暂的足部电击，并在30秒或6小时后接受电惊厥休克，24小时后未观察到失忆现象。如果在电惊厥休克前0.5秒给予第二次足部电击（非条件性），则会观察到失忆现象。如果条件反射强烈，失忆是暂时的；如果条件反射较弱，失忆则是永久性的。
