The above experiment shows that not all the information which is received can be retained for even a second. The information is taken in all right, and 【S1】______ immediately thereafter, most of it is lost and can not be recalled. Only a small part can be retained for future use. Now this immediate-forgetting is not an isolated phenomenon occurs only in the psychological 【S2】______ laboratory, h is, rather, the fate of most of the information which human beings are constantly receiving. Information is taken in, and the bulk of it vanishes within a second and so. On the whole, this 【S3】______ immediate-forgetting is advantageous. Most of the information taking in during the daily round is of 【S4】______ momentary value only. It serves to keep us abreast of the ever-changing relationships among 【S5】______ ourselves and our environment and, this service rendered, its further retention would merely obstruct the ongoing flow of our activities. It is necessary 【S6】______ to retain every minute detail of immediately past circumstances; and indeed, if we did retain these details this would deprive us freedom to consider the 【S7】______ detailed requirements of the present moment. In all of life's activities, we take in, from one moment to the next, a great deal of information which value is 【S8】______ restricted to the moment of its intake. So it is altogether an economy such information be forgotten 【S9】______ immediately. It is an economy that is selected for 【S10】______ more lasting retention be only those minima outstanding characteristics likely to be of future value. 【S1】