A Laboratory Introduction to Psychology by John W. P. Ost

By John W. P. Ost

Advent to laboratory experiments within the box of psychology, easy for advent university classes

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You may find the data points curving downward slightly. This is caused by self-adaptation, for the line itself affects the AL. ) DISCUSSION (a) The slopes of the lines in this figure tell how judgments / vary with length of the line, L. The spaces between the lines are the result of size differences among the boxes. The greater the spaces, the greater the illusion. EXPERIMENT 10 60 The illusion can be measured approximately in inches. Suppose, for example, that judgments of a line with a small square are larger by 11 judgment units than judgments of the same line with a large square.

In ratio schedules, the contingency of reinforcement depends on the number of responses the animal makes. On interval schedules, the reinforcement contingency is dependent upon time and independent of the number of responses made by the animal. On the simplest interval schedule, the experimenter measures some fixed interval of time, say 1 minute, since the last reinforced response and reinforces the first response that occurs after this interval has elapsed. From this reinforced response the experimenter again measures out a 1-minute interval and again rewards the first response to occur after the interval, and so on.

RELATIVE-SIZE ILLUSION 59 RESULTS Total and average the response to the various lines, counting only Trials 3, 4, 5, and 6. Leave the first two trials aside as practice. Plot the average judgment of the five lines with small boxes on a graph, mean judgment as a function of length of line. On the same paper, plot the average judgments of the same five lines with medium boxes, as a separate line, and then the average judgment of the five lines with large boxes. The three sets of data should look somewhat like Fig.

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