Apparatus to qualify individuals for equine-assisted physical therapy is controlled entirely by a trainer or therapist, thereby regimenting the process for consistent and transferable results. In one embodiment, a light emitting device includes a substrate, a nucleation layer disposed on the substrate, a defect reduction structure disposed above the nucleation layer, and an n-type III-Nitride semiconductor layer disposed above the defect reduction structure. One embodiment relates to a memory device comprising a muxing device and at least one cluster device coupled to the muxing device.