[7]. For explanation of technical terms see McCall’s How to Measure in Education.
[8]. This suggestion originated with a colleague of the present writer, who is working upon allied problems.
[9]. See Reference to Ladd and Woodworth.
[10]. It must be remembered that children and adults of almost any birthday age may be at this general intelligence level.
[11]. If alternates are counted instead of the four tests which directly involve reading or spelling, these IQ’s become 88, 85, 87, respectively.
[12]. For all practical purposes, IQ’s differing from each other by not more than 5 points are equal.
[13]. Fildes’ subjects ranged in birthday age from 9 to 16 years. In criticism it should be stated that correlation between IQ and ability to read cannot be clearly interpreted unless an array of birthday ages is given in conjunction. Fildes does not give such an array.
[14]. The substance of discussion under this topic is reprinted by courtesy of the Teachers College Record, from the issue of that journal for March, 1919.
[15]. Quoted by permission of the Atlantic Monthly Press.
[16]. Bidder died at 72.