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
' I-Astmrcmical
2-Aucrift
3-Litfit Phenom.
4-Bi'ds
5-Clouds, Dust. etc.
6-lnsuHic. Info.
7-Psvdtlofical
«-Unkno«n
9-OHw
TOIJI
Au.
Number
Certain
0
T
0
/
t
o
/(.
3
Doubtful
3,
o
(
o
e
/
C
o
3o
Total
8
o
I
/
8
/
/c
J
99
Per Cent
Certain
ao
3S.4
Ad.
0.0
JJ-
4.0
3o
Doubtful
Zo
0.O
/.a
0.O
/•*
a.o
av
303
Total
Z°
s,i
00
/•o
/ • »
8-1
/.0
Jf
/off.
/??/ '
Number
Certain Doubtful Total
Per Cent
Certain Doubtful Total
Ji4f
Number
;ertain
0
a
0
_£_
o
g
Doubtful
0
J."
o
Q
a
o
o
a
o
•S
Total
o
//
o
e>
o
e>
e
0
2
0
Per Cent
Certain
0,0
4t*
0.0
£&
O.O
Us
Doubtful
£>o
3lr
O.e
O.o
0.O
0 o
0.0
O.o
a.o
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St-i'
Total
O.O
S4-i
0.0
0 6
O.O
O.o
o.o
O.o
0 o
/e~o.
Number
Certain
o
o
0
o
o
Doubtful
\
el
O
O
o
o
o
o
o
o
JL
Total
0
P
p
0
A
PerCent
Certain
O.O
O.O
JSJ2-\
0.0
a.0
00
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Doubtful
to
me
-&£-
00
0.0
0.0
0.0
a.o
0.0
0.0
a.c>
0.0
/*0.
Evaluation
O-Balloon
l-Astmnoniul
2-Aircrafl
3-Lijtit Ptienom.
4-Birds
5-Clouds, Dust, e t c
6-lnsurfic. Info.
7-Psychological
B-Unknomn
9-Other
Total
/9fO
Number
Certain
'O
.4"-
O
..
0
g>
9
Per Cent
Certain
aa
£^-
ff.O
0.0
9.0
a.?
a.0
Ooubtfu
40ffi
a. a
£>.e
0.O
0.0
a.e>
0.0
0-a
/oo.
Number
Certain
0
0
/
0
2.
/
S
Doubtful
6
J0
_ .»
0.0
Total
*O
S~o.o
0o
a,a
0.0
0.0
0.*
& *
/0O.
Number
:ertain
O
c,
0
t-
7
>
Doubtfu
X
/°J.
J
0
A-
/:4
0.0
'7.1
Jo
in
Doubtful
3.O
Jo
0 0
/••"
i
jr
0
o
JL
o
IX
232
Total
/o3
Ko4
/fS
AS
/ /
o
/34
/4
13 C
4(,
231
/
SfA/f
ALl/A
ffea
PerCent
Certain
f-i
/3.t
/O.O
/•9
{ML
So
/Ll
/ • *
Jii.
A-L
Doubtfu
Vr?
/o. 7
/ • /
££O
/9
Number
Certain
7
__s2-
l_
0
S-
i
J
3X
Doubtful
J
/o
1
I
O
O
o
o
J
(tcal
S-UnknoM
V O t t w
. Total
Number
Certain
fl
/x
9
0
0
0
/S
0
/4
3
Doubtful
2
4
J"
0
0
p
0
0
a
0
II
r Total
/#
/(,
14
a
e
0
/3
0
/4
3
7O
Percent
Certain
J/4
w
41
0.0
0.0
4.0
OA
0.0
Je.o
43
Doubtful
*1
r.f
aa
'0.a
fa
0.0
0.0
0.0
fie
/*7
Total
/f-3
20.O
0.0
a,0
/ / .O
/?*
/ • * -
su
41
/S0.
/9S2
Number
>rtain
H\7/
/•r
J
0
-23-
/£
37C
Doubtful
32
J4
i3
7
J"
0
a
z
9
/So
Total
7T
//(.
A?
C
0
77
9
9/
Jf
SJ6
Per Cent
Certain
ITS
/*J1
/<>•/
*>.(,
0.0
MA
/7i
i.o
1/.S
Doubtful
/Zo
/.$
?c
0.0
0.a
a, 4
f.a
/•7
Total
/4-i
Z».e
W
4>
/ • *
a.o
/{•(.
n
4-1
/oo.
Number
Certain Doubtful Total
Per Cent
Certain Doubtful Total 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.