Documents / Analysis
Special Report No. 14 was issued by the U.S. Air Force's Air Technical Intelligence Center on 5 May 1955. It is a statistical study of about 4,000 reports of unidentified aerial objects from June 1947 to December 1952. The reports were reduced to IBM punched cards and analyzed with methods including chi square tests. The report concludes that the reports it examined are very unlikely to represent technology beyond present scientific knowledge, and it notes that no case produced valid physical evidence.
a
Evaluation
0- Balloon
1-AstnnMial
2-Aitctaft
3-Ueht Ptunom.
4-BitdJ
5-Clouds, Dust, e t c
6-lnjuflic Into.
7-Pivcno logical
tVUnknoan
9-Orh*
Total
r 4(**i 4LV ir(e? rff* 0/3J&AT &/&AJT//l/eZ 5 /vJ'/p /?£.L VS/f&S
d
0
o
o
o
/
Total
0
t
0
__£_
__£_
0
P
0
$
Percent
Certain
00
50.0
2S.0
0,0
0.0
0.0
0.0
/i.6
an
its
Doubtfu
0.0
A?
Number
Certain
/
/r
f
0
7
^7
Doubtful
s
0
0
0-
/
Total
4 /
/
£_
0
Z.
7
7
/,2
Pet Cent
Certain
/./,
29.O
A77
A.C
0.0
0.0
AC
3.2.
//.J
9.7
Doubtful
4/.S
/..S
9-7
0.0
0.0
0,0
0.0
0,0
/•i
Total
/.¥
/•i
/•i
/i>£ &/? #A'jeer &As>i°es
Numbei
Certain
sz.
23
i?3
2^
./
if
5V
a
Alt,
Doubtfu
_£(/_
(f
2,
j
—0—
^_
Total
-2
0.0
0 0
0o
A2.4
00
/OO.
Evaluation
0-Balloon
l-Astromniical
2-Auciatt
1-lijht Phenora.
4-Birds
5-Clouds, Dust, e t c
frlnsuffic. Into.
7-Psydnlo|ial .
S-Unknoim
M t t w
Total
Numbei
Certain
3
0
0
0
3
0
s -
0
2/
Doubtful
/
r
o
o
2,
Total
1
0
0
0
0
2-
19
o Pet Cent
Certain
207
A0 3
A3.1
0.0
0.0
A0-3
0.0
0.O
72.-7
0.0
0.O
0.0
,'0.3
0.0
£9
A00.
/9S/
Number
:«tain
J_
zz0
_£_
0
2-
_£•
2
17
Doubtful
3
/
0
0
0
o
Total
0
0
0
0
£ /
Per Cent
Certain
//-?
</?
A<}.0
0,0
0.0
0.O
23$
$/O
Doubtful
0.0
A¥. 3
/ /
00
0.0
0-0
0.0
0.0
0,0
A?.0
Total
/4.S
/9-(
211
0,0
0,0
0.0
0 0
9&
A00.
/fsz
Numbet
Certain
20
A/,
3
1
/,
(HA
Doubtful
/ • ^
a
20
2,
c
0
0
0
2,
j{7
Total
3Z
7P
*C
g-
2.
Z.
7
/£3
Per Cent
Certain
/Jj
72.
MS
2.0
0.7
#7
s.t
22.9
Doubtful
7-t
S.9
A3. A
/•?
-AZ-
07
AQ-
0.0
Total
20.9
A? A
23.L
3.S
A¥
/•?
3.?
*/.<,
(00.
Numbei
Certain Doubtfu ToUl
Pet Cent
Certain Doubtful Total
199 Analysis, from the classic collection. The PDF is mirrored here; the original link is under it. 309 pages are in the text index: search them above, or from the library's search.