A Quick Test for Iconic Memory with Necker's cube.

Objective: To clarify memory, the iconic memory was quantitatively studied with Necker's cube for memory disturbances. Design: A case-control study. Materials and Methods: One hundred and two patients complaining of memory disturbance and 30 volunteers participated in this study. After observing a sample picture of Necker's cube for less than 30 sec, the picture was covered with a sheet of blank paper, the subjects were asked to draw the sample picture from memory. Then after covering the drawn picture, the sample picture was uncovered, and they were asked to copy the sample picture under observation. The revised Hasegawa's Dementia Scale was done. The drawn pictures were quantitatively assessed by scoring main characteristic parts of the pictures in appropriate position. Results: The scores showed significant multiple coefficience of correlations and Pearson's correlations between the drawn pictures and the revised Hasegawa's Dementia Scale. Conclusion: A test for the iconic memory was quickly assessed quantitatively with Necker's cube, the test might provide us some diagnostic help for memory disturbance. [ABSTRACT FROM AUTHOR]