The detailed results for one subject (_Mr_,) are given in Table I. The
first column, under _CT_, gives the values of the different compared
intervals employed. The next three columns, under _S_, _E_ and _L_,
give the number of judgments of _shorter_, _equal_ and _longer_,
respectively. The fifth column, under _W_, gives the number of errors
for each compared interval, the judgments of _equal_ being divided
equally between the categories of _longer_ and _shorter_.

In all the succeeding discussion the standard interval will be
represented by _ST_, the compared interval by _CT_. _ET_ is that _CT_
which the subject judges equal to _ST_.


TABLE I.

_ST_=5.0 SEC. SUBJECT _Mr._ 60 SERIES.

_CT_ _S_ _E_ _L_ _W_
4. 58 1 1 1.5
4.5 45 11 4 9.5
5. 32 13 15 21.5
5.5 19 16 25 27
6. 5 4 51 7
6.5 1 2 57 2


We can calculate the value of the average _ET_ if we assume that the
distribution of wrong judgments is in general in accordance with the
law of error curve. We see by inspection of the first three columns
that this value lies between 5.0 and 5.5, and hence the 32 cases of