From Wikipedia, the free encyclopedia. A dopamine agonist is a compound that activates dopamine receptors in the absence of that receptor's physiological ligand, the neurotransmitter dopamine. Dopamine agonists activate signaling pathways through the dopamine receptor and trimeric G-proteins, ultimately leading to changes in gene transcription. 1 Uses.
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The Picture Exchange Communication System (PECS) is a form of augmentative and alternative communication produced by Pyramid Educational Consultants, Inc. Phase 1: How to Communicate During Phase I, the focus is on teaching the student to initiate social communication. 2  The student is taught to approach the communicative partner with a picture of a desired object or food item and place the picture in the trainer's hand, in order to receive the desired reward.