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The main problem of this study is: The effect of the original environmental situation in the recognition and the remembering of human faces. For the experiments, first, we have prepared two series of materiel. For both series we took photographs of ten persons (Barber, grocerer, driver, waiter etc..) while they were at work . Then, we cut the faces of these people from the second copies of their photographs. An d glued them on white cards of the same size. In the third copies of the photographs we drew a circle round the faces and cut out the circle, thus leaving only the situation on the card. Finally, we took photograph of the same people in different situation. In addition to these series of material, we prepared 15 photographs for each group, of different people to be used together with the above photographs. A t the end of the test we put a questionnaire of three questions. We tested 190 subjects, 150 of which were tried in the preparotory experiment and the remaining 40 were tested in the essential test. Al l of the subjects were adults and had fairly good education. We indicated the results in 26 tables, histogrames and graphs. Some of the results are as follows : — The recognition and the remembering when shown in the same situation % 99.7 .— The recognition and the remembering of the Portrait when first seen without the situation % 83.5 — The recognition and the remembering of the Portrait when only the situation is seen % 71.8 — The recognition and the remembering of the Portrait when first seen in a situation % 50.5 — The recognition and the remembering of the Portrait when seen in a different situation % 41 The results we have obtained by using photographs as experimental material are quite similar to those obtained by Gottschaldt using geometric figures. It seems that.in order to be able to remember things or persons with whom we are not well acquainted in various situations, it is necessarry to see them again in the position or situation in which we first perceived them.