Introduction to Psychology 10th Edition by Rod Plotnik,Haig Kouyoumdjian

Exercise 35

We discussed three basic questions that psychologists ask about perception. Our first question-At what point are we aware of a stimulus?-can be answered by measuring the threshold of a stimulus, which is a point above which a stimulus is perceived and below which it is not. The intensity at which a person can detect the stimulus 50% of the time is called the _____.