Category: P

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 with the first term of the pair.  

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. The degree of pain an individual can withstand.  

That level of tolerance at which pain becomes uncomfortable, pain tolerance. The point at which a person finds it impossible to bear pain without crying. Point at which a stimulus activates pain receptors to produce a feeling of pain. Individuals differ in pain threshold, some experiencing pain sooner than others with a higher pain threshold.…

A hypothetical system in the spinal cord thought to account for moderating the signals being sent to the brain. The “gate” can be closed by such techniques as acupuncture and hypnosis, by sending inhibitory signals back down the spinal cord, effectively “closing” the gate.