184 MEMOIRS NATIONAL ACADEMY OF SCIENCES. [vol xv, 



Scoring. — The end products are scored as follows: roints. 



(a) One point for each piece in correct poition; i. e., for a perfect performance 5 



One or both arms not exactly fitting joints '. 4 



One reversal of arms or legs 3 



Two reversals, arms and legs 2 



Legs and arms interchanged, or any other result that looks like a man 1 



Poorer than this, not resembling a man 



(6) One point for each face piece in the correct position, 1 point for a partly correct ear — i. e., one, two, or three pieces 

 in the correct place — and 2 points for a completely correct ear, making a total for accuracy of 5 points. 



Credit is given for time only if the score for accuracy is on (a) 4 or 5 points, on (b) 5 points. Then credit as follows: 



Time. 



(<0 (6) Credit. 



0- 10 0-30 5 



11-15 31-40 4 



16- 20 41- 60 3 



21-30 61-80 2 



31- 50 81-120 1 



51-120 12 1-300 



The maximum raw score is, therefore, 20 points on (a) and (b) together. 



Test 3, cube imitation. 



Materials. — (1) Four 1-inch cubes fastened 2 inches apart to a wooden base. Both cubes and base are painted a 

 dark red. The cubes are numbered 1 to 4 from right to left. (2) A fifth cube of the same size unattached and similarly 

 painted. (3) Ten imitation problems (a to J) , as printed on the record sheet. 



Directions. — Examiner places the cube board before subject, with the numbered side of the cubes directed away 

 from him, and says, " Watch carefully and then do just what I do." Examiner next with the fifth cube taps the attached 

 blocks in a predetermined order, as, for example, in (a) 1 — 2 — 3—4, at the rate of one per second. He now lays the tap- 

 ping cube down before subject, midway between the second and third cubes, but nearer to subject than the cube board, 

 and says, "Do that." If in the first problem subject taps 4 — 3 — 2 — 1 instead of the reverse, examiner credits the response 

 and says, "No, begin here" (pointing to 1). 



Parts (b) to (j) are given in order unless subject fails in 5 successive parts. In this event the test is discontinued. 

 It is important that the rate of tapping should not be faster than one per second. 



Scoring. — The responses are recorded as right (+) or wrong ( — ) ; and 1 point is given for each success. The maxi- 

 mum raw score is 10 points. 



Test 4, cube construction. 



Materials. — (1) A block of wood (model 1) 1 by 3 by 3 inches, painted a dark red on the four sides, not on the upper 

 or lower surfaces, and cut to a depth of 2 mm. , so that it closely resembles a composite of 9 small cubes. (2) Nine 1-inch 

 cubes necessary for the construction of model 1, four painted on two sides, four painted on one side, and one not painted. 

 (3) A block of wood (model 2j, same size as model 1 bat painted on the top as well as the four sides. (4) Nine 1-inch 

 cubes necessary for construction of model 2. (5) A 2-inch cube (model 3), unpainted and cut on the six surfaces so 

 that it looks like a composite of eight small cubes. (6) Eight 1-inch cubes painted on three sides for the construction 

 of model 3. 



Directions. — Examiner presents model 1, and says, " You see this block. Notice that it is painted on the sides but not 

 on the top or the bottom; and you see these smaller blocks (examiner presents blocks described under (2), above) partly 

 painted and partly unpainted. These nine blocks can be put together so as to make one just like this." Examiner puts the 

 blocks together, pointing to the painted surface or surfaces of each cube as he fits it in position. 



(a) Examiner then presents the same model and blocks in irregular order, and says, " Nov, you Jit the blocks together 

 so as to make one like this." 



(b) Examiner now presents model 2 and the blocks for its construction and says, "Now, put these blocks together 

 so as to make one just like this. Notice that it is painted on the edges and on the top but not on the bottom." 



(c) Examiner presents model 3 and says, " You see this block; notice that it is not painted anywhere; and you see these 

 smaller blocks (present blocks described under (6) above) that have three sides painted and three not painted. Now, Iwant 

 you to fit these eight blocks together so as to make one just like this. Remember, it is not painted on the bottom, top, or sides." 



With a stop watch examiner takes time in- seconds for assembling the cubes. He also counts the number of moves. 

 A move is to be understood as a placement in some position designed to complete the structure. If parts of a structure are 

 assembled separately, putting such parts together does not count an additional move. If the blocks are fitted together 

 in the hand, the moves are counted just as they are if assembled on the table. Turning a block over or otherwise shifting 

 its position in the structure is counted a move, but turning it over in the fingers, picking it up, and placing it upon the 

 table are not to be counted moves. Subject is penalized sufficiently for such behavior by the longer time. 



Time for Work on each part, two minutes. If subject assembles blocks before time is up, allow spontaneous correc- 

 tions, counting extra time and additional moves. Each block changed counts one move as before. The time should 

 be taken when subject indicates verbally or otherwise that he has finished. 



