A I W 9 6 1 IN A I
AlSproyed For Release 2000/08/iLvwlml-%WrAn-miqimuUO200150006-0
Attachnie'n't to' ORD' '224'0'-"75
Y.
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I I IfIL
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Approved For Release 2000/08/10 : CIA-RDP96-00787ROO0200150006-0
988 passes). The results, shown in Table 3, indicate no significant
departure from random expectation during the successful run, and therefore,
the significant result cannot be attributed to machine malfunction.
At a later time, subject S2 was asked to repeat the entire exper-
iment, and he was able to replicate successfully a high mean scoring
rate (27.88/100 average over 2500 trials, a result whose a priori
probability under the null hypothesis is p = 4.8x10-4 ).
We thus conclude from this part of the study that of the'six sub-
jects tested, one subject 02) generated a significant result replicable
and not attributable to machine malfunction.
Finally, the study taken as a whole (15,750 trials) was significant,
yielding an average scoring rate 26.47 hits/100 trials, a result
-5
whose a priori probability under the null hypothesis is p = 1.lxlO
The bit rate associated with the information channel can be cal-
culated from
R = H(x) - If (x)
y
where H(x) is the uncertainty of the source message containing symbols
with a priori probability P
4
H(x) P 100. P..
i ~2
and H(x) is the conditional entropy based on the a posteriori pro-
y
babilities that a received symbol was actually transmitted
4
H (x) P(i'j) log2 P i(i).
i,j=l
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Approved For Release 2000/06/10 CIA-RDP96-00787ROO0200150006-0
For S2s first run, with Pi 1/4, P(k,k) 0.2936, and an average of
30 seconds per choice, we have a source uncertainty II(x) = 2 bits and a
calculated bit rate
R ;:zz:0.007 bits/symbol
or R/T se2xlO -4 bits/sec.
Approved For Release 2000/08/10 : CIA-RDP96-00787ROO0200150006-0