_____

(1) It may be kept active by a continuing peripheral stimulus.

(2) It may be unable to discharge fully because its main path of
discharge is blocked.

H. _______

(1) The main center has minor connections with other
centers, in addition to its main path of discharge.

(2) The persisting activity of the main center influences
other centers by way of facilitation and inhibition.

2. Fill in the blanks in the following paragraph:

"A motive or (1) is a reaction that has not yet come off. It has
been (2) by some stimulus, and it tends towards a certain (3),
which however it is unable of itself to produce, but requires the
assistance of another (4) which is not yet present. The motive
gives rise to (5) responses, which, if (6), finally bring the
required (7), and this, combined with the (8) arouses the (9), and
so brings the whole (10) of acts to a close."

3. Cite cases illustrating the importance of preparatory adjustment
(a) for securing prompt reaction, and
(b) for securing keen observation.

4. Cite a case where some need or desire gives rise to a series of
preparatory reactions.

5. Cite a case where a need or desire leads to the omission
(inhibition) of acts that would otherwise have occurred.

6. What is meant by the last sentence in the chapter?

7. An experiment on the "delayed reaction". Take two sheets of
paper, and on each write the letters A, B, C, D, E, and F,
scattering them irregularly over the sheet. The task, in general,
is now to take aim at one of the letters, while your hand, holding
a pencil, is raised to the side of your head, and then to close the
eyes and strike at the letter aimed for. First aim at A, and mark
the point hit with an a, then the same with B, and so on. With the
first sheet, strike as soon as you have got your aim and closed
your eyes; but with the second sheet, aim, close your eyes, and
count ten slowly before striking, keeping the eyes closed till the
stroke has been made. Two sorts of observation should now be made:
first, introspective--record at once what you can of the way you
kept your aim during the delay. Second, objective--measure the
errors, and determine how much the delay affected your aim. What
conclusions can you draw from the experiment?

{88}

REFERENCES

On the "delayed reaction", see Walter S. Hunter, "The Delayed R