PLANNED PARENTHOOD FEDERATION OF AMERICA (PPFA)
an establishment which encourages full reproductive and complementary medical services- advocates public policy which guarantees everyone has such services available…
PLAY THERAPY
the utilization of play activities and materials in child psychotherapy. Play-therapy methods are based upon the theory positing that such…
PACINIAN CORPUSCLE
a form of cutaneous receptor organ which is sensitive to vibration and contact. It contains a nerve-fiber ending encompassed by…
PALINOPSIA
the continuation or reappearance of an image after the stimulant has been eliminated. Palinopsia is correlated with posterior brain damage,…
PAPEZ CIRCUIT
initially explained by American neuroanatomist James W. Papez, a circular composition of nerve centers and fibers in the brain which…
PARADIGM CLASH
with regard to science or philosophy, the conflict which takes place whenever a new group of basic presumptions about reality…
PARAGRAPHIA
noun. a state wherein writing is skewed by transposition or exclusion of letters and terms or imposition of inaccurate and…
PARALLELISM
1. typically, the quality or state of being parallel, structurally alike, or possessing correlating aspects. 2. with regard to philosophy,…
PARANOID PERSONALITY DISORDER
in the DSM-IV-TR, a personality disorder marked by (i) pervasive, unnecessary suspicions and mistrust, (ii) over-sensitivity and, (iii) limited affectivity.
PARATHYROID HORMONE
a hormone dispersed by the parathyroid glands whenever blood-calcium levels are minimal. It encourages dissolution of bone tissue and absorption…
PARENTAL INVESTMENT
the quantity of energy a mother or father uses in caring for their young. Since ova are much bigger than…
PARETO PRINCIPLE 1
with regard to economics, the standard postulating that eighty percent of the wealth in any culture will be owned by…
PART METHOD OF LEARNING
an acquisition type wherein the material is separated into portions, each to be mastered on its own, in a successive…
PARTICIPANT
noun. an individual who participates in an investigation, analysis, or experiment, for instance by performing jobs mandated by the experimenter…
PARVOCELLULAR SYSTEM
the part of the optic system which projects to or starts from small neurons within the four dorsal layers of…
PATH COEFFICIENT
with regard to path analysis, any of the set of regression-like coefficients which show the magnitude of unions across the…