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

تمرين 1

The smallest increase or decrease in the intensity of a stimulus that a person can detect 50% of the time is called a (a) _____. The increase in intensity of a stimulus needed to produce a just noticeable difference grows in proportion to the intensity of the initial stimulus; this is called (b) _____ law.