PURPOSIVE SAMPLING
Knowingly sampling from a sub-population that shares the same characteristics as the population as a whole.
PRESSOR EFFECT
The physiological effect of vasoconstrictors on a patient's blood vessel walls affecting veins and arteries.
PRETERM VIABILITY
The possibility of survival of a fetus outside the womb prior to full-term delivery.
PREVOCATIONAL TRAINING
Designed as a prepatory training, prevocational training does not concentrate on job-specific skills, but rather attempts to enhance a subject's…
PRIMAL-HORDE THEORY
In his work entitled Totem and Taboo, published in 1913 Sigmund Freud theorized the concept of the original tribe or…
PRIMARY CORTEX
Any region of the cerebral cortex that receives information from sensory receptors or communicates with muscles for action. Examples are:…
PRIMARY RELATIONSHIP
One's closest relationship. The one relationship the individual deems important enough to invest large amounts of time, energy and physical…
PRINCIPLE OF DISTRIBUTED REPETITIONS
A learning concept that states that repeating of material should be spread out over time as opposed to being compacted…
PRIVATE MENTAL HOSPITAL
Typically smaller in regards to patients than a public hospital, a private mental hospital is staffed and operated by a…
PROBABILITY MASS FUNCTION
A function in mathematics that assigns a value to the probability of a random variable taking on that value.
PROBLEM SPACE
The problem space is a set of all possible and logical steps to take to arrive at the solution to…
PROCESS EXPERIENTIAL PSYCHOTHERAPY
Proposed by Canadian psychologist Leslie Greenberg, Process Experiential Psychotherapy focuses on the moment-to-moment experiences of the client in an attempt…
PRODROMAL SYNDROME
A syndrome characterized by traits the may predispose an individual to develop a psychological or neurological disorder.
PROFESSIONAL-APTITUDE TEST
A professional aptitude test is used in such fields as psychology, law, nursing, medicine and others to select candidates for…
PROGRAM IMPACT
Once a program has been designed to produce a specific type of good or service, the program impact looks at…
PROGRESSIVE-RATIO SCHEDULE
A schedule of reinforcement in which a reinforcer is only presented upon the completion of a set number of responses.…