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.
“Roe”1 page
Evaluation
0-Balloon
1-Astnnwnical
2-Aircraft
R i g h t Phenom.
(-Birds
5-Clouds, Dust, etc
6-lnsuffic Into.
7-Psycholo|ical
8-Unknown
Wther
Total
S~
F
/PS
Number
Certain
3.
23
J-
-2-
0
-13-
31
tj
\2lA
Doubtful
ti
i.
'erCent
Doubtful
{•*
(••5
fi-.L
f l
61
16
rti
fl-6
4/.I.
O
Total
'A ,(>
IQQ-
0
13$
Certain
a*
X?
itt
/t,7
At
16
OJO
1.5
' P I
'erCent
Doubtful
L-Al
yJjA
L-1L
-4Z
u2A
-U-
-M\
-JA
JLA
Mi
Total
r ?
1i7
u, ?
f.7
fl.O
/> o
11,1
/to.
S/r, /try/yc, s
//
Number
Certain
—jl
J?
ifO
1
1
0
16
iff
Doubtful
/fl
/£
33
1
I
z
t>
' -Z
a
Total
A
7-5
7
II
MS
f
Certain
/ 7 /
H \
0.1
/7i
erCent
Doubtful
u6-V
/fl
OS
o.f
00
y.7
U2X.
Total
U.1
V.t
/•fl
1,0
If
u11, ^
SI
loo,
Certain
7
3/
0
5~
0
If
41
Hi
Number
Doubtful
t
/ •
0
0
0
2.
is
—&
Total
/I
.r?
4
6
II
n
7t3
c S.
Per Cent
Certain
XL
0.0
1 /
6C>
-Ml
22JL
Doubtful
Cl
/.1f
06
0.5
^00
a.o
7 J.
J7.C
Total
tLJ,
I-A
Y7
O.d
U
1 .A
IP-I
Total
1?
Zl
I/O
li
-A?
30
f
Per Cent
Certain
LU.
Z.l)
13$
1.1
0.X
0.0
7.t
Z.2.
Uih
3.7
m
Doubtful
?•?
17
113
/.0
0.P
0.7
f-fl
0.7
AW
Total
73.5
•£7-
2-7.1
2,7
0.1
J00.
Number
Certain
-12
—2i
-Ml
/£
0
1
1
-LSL
Doubtful
-JiSL
/r
ua-
1
r
0
0
o
UK
Total
¥9
1f
I f
/
9 6
j /
UXl
Pit Cent
Certain
i ' l
Ss.
00
o.x
JlL
s,o,i
JJ>\
7£A
Doubtful
101
(.1
0 6
6.6
I.H-
Total
fl-?
f0
3
iv
Total
¥7
f?
2fJ
/
//
(c
i 7
I/
PerCent
Certain
JiJL
£1
-Mi
0/i
JLL
213.
m
Doubtfu
a
%\
f.f
4.6
0.6
64
a.o
/•S
7*3
Tola
71?
IK?
1(1.?
10
16
i>.f
?•(•
? 0
66
10
10
Per Cent
Certain
zz
/f.e
1*1.
^ 2
_£j
Kl1 ^
Dabtful
9-1
SI
03
0,0
a.o
^3
00
"Total
If 1
\fC 6
I I
\JlJ>
11-7
f f
Cn/
/OO.
/ ? #7
S^ £E.COM0S OA L^SS
Number
Certain
0
&
C
0
0
0
0
L
7
Dottbtfu
0
/
0
0
0
0
p
o
/
Tobl
^
7
0
0
0
a
o
0
0
%
PetCent
Certain
a.O
7£.t>
-M.
O-O
0/)
0J)
J2A
J3J-
ns
Doubtfu
00
/f-{
0.0
OX)
OJO
Od
0.0
ao
0.0
0 0
/*
o
Total
ft
i
6
0
0
0
0
ll
Per Cent
Certain
06
£&$
0.6
0.0
0/)
ad
5&.0
Doubtful
fo.O
0.6
0.0
M)
Total
Per Cent
Certain
(1
\ _ _
Doubtful Total
Number
Certain
Z
7
/
r
A
y
//
'3
Doubtful
P
(•>
0
n
/
S7
0
6
Total
y
//
2
/
0
0
7
if
O
Per Cent
Certain
7 S
ZX2.
-11
0.0
HZ
M&.
Doubtful
0.0
0 6
O.O
0.6
0.0
00
I t
O-O
0.6
?."/
Total
AJL
70.7
1.S
7-/
0.0
0.0
/"T-7
7-fo
20.8
/06^
157 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.