140 



MEMOIRS NATIONAL ACADEMY OF SCIENCES. 



[Vol. XV, 



Series 2. 



*(a) plate — saucer. 



(6) pen — pencil. 



(c) animal — plant. 

 *(d) the sun — the moon. 



(e) snake — cow — sparrow. 



*(a) cat — hen. 



(6) watch — clock. 



(c) mosquito— sparrow. 

 *(d) nail' — screw. 



(e) wool — cotton — leather. 



*(a) knife — fork. 



(b) needle — pin. 



(c) steam — electricity. 

 *(d) bucket — basket. 



(e) book— teacher — newspaper. 



*(a) hat — cap. 



(6) cigar — cigarette. 



(c) brick— stone. 

 *(rf) river — lake. 



(f) knife blade — penny- 



Scries S. 



(J) lamb— calf— child. 

 *{g) lawyer— judge. 



(h) grass — cotton — tree — thistle. 



(i) coal — a waterfall. 

 *(j) mistake — lie. 



(J) spider — fly— elephant. 

 *(g) rascal — thief. 

 (h) ship — bicycle — automobile — train. 



Series 4. 



Series 5. 



-piece of wire. 



(i) egg — seed. 

 *(j) anger — rage. 



if) physician — surgeon — dentist. 

 *(g) surgeon — ordinary physician. 



(h) dog — tree — spider — eagle. 



(i) farm — factory. 

 *(j) laziness— idleness. 



(/) scissors — knife — axe. 

 *{g) man — gentleman. 



(h) water — blood — oil — milk. 



(i) addition — multiplication. 

 *(i) poverty— misery. 



Test P, ingenuity. 



Directions.- — The formula is as follows: "A soldier must measure out exactly 3 ounces of medicine for a sick com- 

 rade. He has only an 8-ounce bottle and a 5-ounce bottle to do it with. Show how he can use these two bottles to 

 get just the right dose of 3 ounces without any guessing. Begin by filling the 8-ounce bottle." Examiner writes 

 8 — 5 — 3 on a piece of paper, leaves it in sight of subject, and says, "Remember you have an 8-ounce bottle and a 

 5-ounce bottle to get exactly 3 ounces. Tell me how you would do it and tell me everything you do." Directions 

 are not to be repeated. Subject is not allowed to figure with a pencil. The solution must be given orally. 



The above illustration of the formula is for problem (a) of series 1. The other (a) problems are stated in the same 

 way, using the appropriate numbers. In giving the (6) problems and (c) problems the formula is abbreviated to, 

 "This time you have a 5-ounce bottle and a 7-ounce bottle to get 3 ounces; begin by filling the 5-ounce bottle." 



One series of three problems should be given to each subject. The problems are always to be presented in the 

 order (a), (6), (c). 



Time allowed is 2 minutes for the (a) problems and 5 minutes each for the (b) and (c) problems. Work on the 

 (6) and (e) problems is discontinued after 2 minutes if subject has not completed the third step in the solution. When 

 any problem has been failed the experiment is discontinued. 



The solution must be unaided other than by general encouragement. If subject asks if the bottles are marked, 

 examiner should say "No." If subject asks whether it is permissible-to pour from one bottle to another, the answer 

 is "Yes." 



Scoring. — Examiner records all the steps made by subject, or as nearry all as possible. The recording should be 

 done in the notation employed in the problem lists below. Thus, for problem (a) the steps are fS (fill 8); 8t5 (pour 

 from 8 to 5); e5 (empty 5). The steps taken are not to be numbered in the record blank; they are merely recorded in 

 order in the above notation. 



(N. B. — Examiner. Observe that one of the measures must be filled or emptied at each step in a correct solution. 

 It will be noted that each of the problems as written below gives first the measure to be filled first, then the other 

 measure, and then the quantity to be obtained. Thus 8 — 5 — 3 means an 8-ounce bottle and a 5-ounce bottle to get 

 3 ounces; the 8-ounce bottle to be filled first.) 





