Date of this Version
Thesis (M.A.)—University of Nebraska—Lincoln, 1950. Department of Psychology.
Thirty animals were divided into three splitter groups of ten and were placed upon a half-hour feeding rhythm, then brought together and studied.The conclusions that were made from this experiment may be stated as follows:
1. Rats run without food at the end of maze, when a reward was presented, and did not show significantly large decreases in time and error scores.
2. The hypothesis that frequency is a factor in the development of a cognitive map in a maze situation seems to receive no support from this investigation.
3. The introduction of reward after a period of non-reward did not appear to alter the difficulty of the blinds as significantly as hypothesized by Tolman-Honzik.
(a)The non-goal-pointing blinds did not appear to become relatively less difficult during the reward period of the non-reward group.Group II increased the percentage of total errors from 56 percent in the non-reward situation to 64 percent in the reward situation.
(b) The goal-pointing blinds decreased slightly in difficulty with the introduction of reward for the non-reward group.Group II decreased the percentage of total errors from 44 percent in the non-reward situation to 37 percent in the reward situation.
(c) A hypothesis that the animals anticipated the next to the last correct turn of the maze was suggested by the increases in the total errors in right-turn blind alleys.Group II increased the percentage of total errors in right-turn blinds from 38 percent in the non-reward situation to 65 perent in the reward situation.
4. In the comparison of the methods of recorded errors which were used by Tolman-Honzik and by Reynolds, there was no significant difference in the final result.All the ratio computed upon the present decrease in error did not give a result significant to the five percent level.
Advisor: William J. Arnold