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.
You can find out when most of the Newcombe families immigrated to the United States. You can focus your search to immigration records dating from that era. Immigration records can tell you an ancestor's name, ship name, port of departure, port of arrival and destination. from the Social Security Death Index (SSDI).