FIELD V 

 Column 67 



TIME TO EVALUATION 



Organization 



As in the case of Fields M, N, P, Q, and U, the quantitative numerical values for Field V (time 

 periods) are reduced to single-unit symbols for accommodation by a single punched card column. For 

 example. Symbol 2 represents any period of time within the range of 0.5 second through 1.0 second; 

 Symbol L may represent any time period from 4 through 8 days. 



The several ranges of time periods have been organized to give a logarithmic progression from 

 a very narrow range for brief periods (e. g. , 0.5 second through 1 second, a range of 0.5 second) to 

 correspondingly appropriate ranges for longer periods (e. g. , >16 months through 32 months, a range 

 of 16 months). 



The list of code symbols and their definitions is broken into four groups corresponding to the 

 standard IBM punch combinations that form the symbols. (Numerical symbols, 1 through 9, require no IBM 

 zone punch; Symbols A through I are formed by use of the 12 zone punch; Symbols J through R are 

 formed by use of the 1 1 zone punch; and Symbols S through Z are formed by use of the zone punch. ) 

 The reason for this separation in listing is explained in the discussion on double coding, Division 8, 

 of the Specific Directions and Explanations below. 



General Use 



Field V is used to code the period of time needed to produce a response (Fields T-l and T-2) 

 to a given degree (Fields W, X, and Y). In other words, this is the period of time beginning at the 

 initiation of treatment and ending at the point when the observation or measurement was made on which 

 was based the evaluation of the response. 



Note that "time of evaluation" is not synonymous with "duration of observation" which may 

 extend far beyond the point at which the response is evaluated. Consider a response which began 

 two minutes after administration of the test compound, reached a peak four minutes later, remained 

 at a plateau for 10 minutes, and took 30 minutes thereafter to return to normal, when observation 

 ended; evaluation was based on the greatest degree of response (i. e. , at peak action). In this 

 example, the period to evaluation (Field V) is six minutes, whereas the duration of observation is 46 

 minutes. The CBCC has no provision, nor has it a need, to code the duration of observation (except 

 coincidentally, as explained in Division 2). 



Specific Directions and Explanations 



1. Relation between Field V and Fields X and Y 



The time period coded in Field V (time b'etween beginning of administration and the point of 

 evaluation) is never used as a basis for evaluation by any criterion in Field X, as the time periods in 

 Field U are; on the contrary, the entry in Field V is dependent on when the response is evaluated. For 

 example, if ten observations are made at intervals of several minutes during a test and evaluation 

 (Fields X and Y) is based on the fourth observation, the time period coded in Field V ends at the point 

 of the fourth observation; if the evaluation were based on the ninth observation, the time period coded 

 in Field V would end at the point of the ninth observation. (In this example, where evaluation is 

 based on some observation other than the last, the period ending with the last observation would not 

 be coded, because there is no coding field specifically for "duration of observation". ) Ordinarily, in 

 such a series of quantitative observations, evaluation is made (and the "time to evaluation", in 

 Field V, ends ) at the point of peak action, though it may be made at the end of a pre- determined 

 optimal time (which will consequently be the "time \to evaluation") or at the point of some particular 

 degree of action other than peak action. If evaluation is made according to more than one of these 

 (e. g. , [1] evaluation based on the intensity of response 10 minutes after administration and [2] 

 maximum intensity of response regardless of time), two times to evaluation are involved in the same 

 test. This does not involve a double entry in Field V, because two evaluations have been made using 



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