| Sec. | ||
| From | blue, | 1.603 |
| " | green, | 1.597 |
| " | yellow, | 1.589 |
| " | red, | 1.549 |
From red appears to be the easiest change, and from blue the hardest.
The getting away from a presented blue was the easiest and from a presented yellow the most difficult, as seen by these averages (216 exp. each):
| Sec. | ||
| From | yellow, | 2.54 |
| " | red, | 2.49 |
| " | green, | 2.29 |
| " | blue, | 2.16 |
The returns to the presented colors show that it was hardest to get back to the presented yellow, easiest to get back to the presented blue, the averages (216 exp. each), being:
| Sec. | ||
| To | yellow, | 1.67 |
| " | red, | 1.61 |
| " | green, | 1.58 |
| " | blue, | 1.47 |
The facts as to blue and yellow shown by these four tables of averages may be expressed also in this way:
If a blue square was shown, it was easier to change the blue memory image into the other colors, and also easier to get back the blue memory image after such changes, than if any other of the three colors was presented.
If another color than blue was shown it was harder to change the memory image of that color to blue than to any of the other colors, and also harder to get back to the memory image of that color from blue than from any of the other three colors.
If a yellow square was shown, it was harder to change the yellow memory image into the other colors, and also harder to get back the yellow memory image after such changes than if any other of the three colors was presented.