Applied Psychology: Making Your Own World / Being the Second of a Series of Twelve Volumes on the / Applications of Psychology to the Problems of Personal and / Business Efficiency

by Warren Hilton

Chapter III

SENSORY ILLUSIONS AND SUGGESTIONS FOR THEIR USE

Unreliability of Sense-Organs

Figure 1 shows two lines of equal length, yet the vertical line will to most persons seem longer than the horizontal one.

Fig. 1.

In Figure 2 the lines A and B are of the same length, yet the lower seems much longer.