Master of Science
In a variety of leaning situations, delay of reinforcement has been found to result in a lower level of responding. There is some question whether the asymptote of learning or only the rate of approach to asymptote is affected by delay. In addition, delay of reinforcement has been shown to increase resistance to extinction.
Sgro, Joseph A., "The effects of delay of reinforcement on subsequent running behavior under immediate reinforcement" (1961). Theses and Dissertations. 3088.