Find over 25,000 psychological definitions


Parkinson'sdisease

 a degenerative neurological disorder, typified by difficulties in movement, forinstance a continual rapid tremor in the limbs, a lack of sensory-motor co-ordination and atendency to be continually tired. The condition is thought to be caused by problems in theproduction of the neurotransmitter dopamine.

Browse dictionary by letter

a b c d e f g h i j k l m n o p q r s t u v w x y z

Psychology term of the day

June 21st 2021

pervasive developmentdisorder (PDD)

refers to a group of five disorders characterised by delays inthe development of multiple basic functions includingsocialisation andcommunication. The most commonly known PDD is autism.