To reduce pain. The alleviation of some aspects of a disease, e.g., the reduction of the pain and suffering accompanying...

A condition of experiencing prolonged visual afterimages.  

The science that deals with the life of past geological periods.  

The study of plant life of the geologic past.  

A technique of studying memory involving the presentation of pairs of words, pictures, or phrases, paired associate method.  

A procedure in which subjects learn to provide particular response terms to various stimulus items, paired associate learning.  

Learning pairs of terms. Subjects are required to respond with the second member of the pair of terms when presented...

The process by which two people form an extremely close attachment.  

A threshold, influenced by psychological factors, at which a person indicates that he or she cannot tolerate any further stimulation....

That level of tolerance at which pain becomes uncomfortable, pain tolerance. The point at which a person finds it impossible...