Abstract: The purpose of this study was to explore the problem of the best ageof the ability of recognition. Tested were eight age groups. each of whichconsisted of 24 subjects, with a total of 192 subjects in all. Three groupsof test materials used in the experiment were both concrete and abstractpictures, and words. The results show that the best age of recognizing concrete pictures iseleven and middle school students of 15 are the most powerful inrecognizing abstract pictures and words. In addition, we also came to know that the signal detection theoryhas many advantages in the research of memory.

Key words: NULL