THE problem is to determine certain characteristics of association; namely, rapidity, kind, reinforcement, error, and persistence.
1. Rapidity.--Call out a key-word, for example "star", and give O exactly 8 seconds, counting from the moment of the giving of the key-word, in which to speak as many disconnected words as he possibly can. Let O write them down in a vertical column, beginning with the key-word, while they are fresh in his memory. Secure five records, using as many key-words.‡ Find the total number of words in each column excluding the key-word, and divide 8 by that number to get the average duration of each association.
This experiment might be called chain reaction in free association. It has three objects: first, to secure____________________