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.
s s
Evaluation
0-Balloon
lAlllOTOBIdl
7-Airctitl
3-Li£ti| Pfienom.
4-Birds
S-Clouds, Dust, etc
6-lnsuttic kite.
7-Piydnlo|ial
t-Ur*MMi
Mttiw
Total
Numbet
Certan
0
1
,H
0
0
0
0
0
3
I
IO
Doubtful
/
1
0
0
0
0
0
a
0
9
Tola]
/
d
5
0
0
0
0
0
3
1
Pet Cent
Certain
0.0
l/.l
21.1
0-0
0-0
QJL
00
o.O
IC-I
SS.C
Doubtful, Total
S.I,
Ml
o.o
0. Q
Q.O
2 7«
Q.Q
0.6
0-0
iT^i 6.6
o.o\ o.C
O.o
o.O
/t-7
/no.
Number ,
Certain
2
2
1
Q
0
/
0
!
/
B
Doubtful
Q
Q
Q
0
0
0
0
0
0
(*
Total
7
9
1
lO.S
o.f
0.0
to
Off
is-8
o.o
100.
Evaluatnn
0-Balloon
l-Astionooiul
2-Aircrift
3-Lijht Phenon.
4-BirH
9-9
/:?•?
i.%
iff.
Au& (J5T
Number
Certain
9
1
1
0
0
0
2
2
/
0
7
Doubtfu
Q
3 0
2
0
0
9
Q
o
o
• o
32
Total
O
31
3
0
0
9
2
I
1
0
3?
Pet Cent
Certain
0.0
2.C
7-t
0.0
o.o
o.f
S.I
u
z<>0.9
111
Doubtful
0-0
S.I
O.o
o.o
e.t
0.0
o.o
0,0
o.o
fo.J
Total
OJ
V.5
7 7
O.O
tl-0
CO
S.I
5-1
i-0
100.
1
Evaluation
0-Balloon
1-Astromiiiiul
2-Aircrafl
3-Lirnt Pfienon.
t-Buds
S-Clouds, Dust, etc
6-lnsuffic Info.
7-PsychologicaJ
D-Unknowi
Wither
Total
Number
Certain
/
0
0
n
0
2
{)
0
0
3
Doubtfu
• 0
0
0
0
0
0
0
0
0
0
0
ToUl
;
0
0
0
0
0
•2
9
d
0
3-
Pet Cent
Certain
3.3.3
8.9
CO
0.0
O.f
d.0
CC.7
Q.f
0.0
Q.O
lOO-Q
Doubtfu
0.0
9.0
(?•(?
0.0
o-o
o.o
0.0
0.0
9.0
Total
33.3
Q.O
OP
Q.fl
0.0
0.0
0.0
1$
Number
Certain
0
1
1
0
0
0
2.
0
I
6
S
Doubtful
0
J
/
•o
0
0
0
0
0
0
H
Total
0
9
%
9
0
0
X
g
i
0
f
Pet Cent
Certain
0-0
ILL
II-1
O.o
0.0
0.6
22.2
O.o
ll-l
0.0
550
Doubtful
0.0
33-3
II-1
Off
0.0
0,0
0-0
o.o
CO
Total
6.0
0,2-2
OJO
00
322
0.0
III
O.f
too-
Nuflter
Certain
Q
if
0
0
0
0
0
0
1
0
Q
Doubtful
/
7
0
0
&
0
0
0
0
1
Total
/
/
Q
0
0
0
0
0
15
Pet Cent .
Certain
0-9
ZL1
1A
9.0
0.0
o.o
o.o
o.o
/33
O.O
qt.o
Doubtful
i l
c-i
9-t
o.o
(10
0.0
1.0
0.0
o.o
60.0
Total
L-7
73.H
Cl
o.o
o.o
O-O
0.0
00
13-3
00
100.
Number
Certain
/
2
2
0
6
0
0
3
2
1L
Doubtfu
0
if
Q
0
0
0
d
0
0
0
Total
/
C
%
6
0
0
1
0
3
/5
Per Cent
Certain
i . l
/3-3
/J-3
CO
O.O
0.0
(o.l
0.0
Zo.o
13."$
73-3
Doubtful
o.a
U.I
0.0
0-0
Q-0
Q.O
O-O
Of
O.o
o.o
Hi
Total
(-7
19-0
133
0.0
0.0
0-0
(,l
'0-0
i9-f
I1Q
104.
119 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.