In situations when the presentation of reinforcement is controlled, such as during training, the timing of when a reinforcer is presented can be manipulated. During the early stages of learning, continuous reinforcement is often used. This schedule involves reinforcing a response each and every time it occurs.
Newcomb is either English or Welsh in origin and if your family arrived in the earliest batch of pre-revolutionary Newcombs they came from the English west country which can also mean Wales. If you need more information there are two books on the Newcombs. I have the one published in 1874.
Lipscomb's father moved the rest of the family back to Tennessee in 1835 or 1836 and he married his third wife, Jane L. Breedan (died September 8, 1885), on April 11 or August 11, 1837. David's half-brother, also named Granville, was born to Jane Breedan Lipscomb.