According to the ____ law, a neuron fires an action potential at only one level of intensity

The owner of a business shows up randomly three or four times a month and inquires about the employee's health, their families and how they are getting along at work. He also passes out a few extra dollars

The owner is reinforcing his employees on a __________ a) variable-interval schedule. b) fixed-interval schedule. c) variable-ratio schedule. d) fixed-ratio schedule.

Baby Todd's mother notices that he makes a variety of sounds including cooing, crying, gurgling, and murmuring, along with facial expressions, gestures, imitation, and other nonlinguistic means. Baby Todd is demonstrating __________

a) phonology b) morphemes c) semantics d) prelinguistic communication