Page:Kohs-Block-Design tests-1920.pdf/7

 cases it may take only fifteen or twenty minutes, in others perhaps an hour.

(B)

Preliminaries

Seat the subject comfortably at a table, noting that his visual angle when working with the tests is not less than 45 degrees. Be sure that no designs are visible in your preliminary instructions, nor more than a single design at any one time. The blocks which are not being utilized should be kept in a box, apart, so that they are either invisible to the subject, or if visible, the blocks should be arranged so that the top sides are all of the same color.

(Section A) Take a block. (Instructions to subject are placed in quotation marks. For Design 1 four blocks will have been removed from the box.) "Here are some blocks,—give me the name of the color on this side." Sides with the full color are presented first. Place your finger on the side designated. After the subject has responded, turn to another side. "And what is the color on this side?"—"Now the color here?"—"And what is the color here?"—If the subject has succeeded in naming the colors correctly, proceed with the experiment. (If he has failed, further instructions are given below, in Part 2.) Then the experimenter explains: "Now on this side we have blue and yellow, (point), and on this side red and white (point). And all the blocks are painted in the same way."

(Section B) "What you are to do is this: Take these blocks," (Shuffle them so that when finally placed before the subject, no more than one fourth of the blocks have topside colors which are present in the design, the separate blocks being placed apart, flat on table, and not piled one on top of another) "pick out the right colors, put them together, and make them look, on top, just like this." (Point to design 1.)

Give no further hints nor suggestions if the directions have