Answer:
a 10th of a second delay between hearing the bell and noting the position of the pendulum (and vice versa)
Explanation:
Using a pendulum that hit a bell upon reaching its outer limits, Wundt demonstrated a 10th of a second delay between hearing the bell and noting the position of the pendulum (and vice versa), and it was during that very brief period that a mental process occurred.
Children learn by using their senses and to adjust their cognitive schemes.
