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.
Evaluation
0-Balloon
1-Astnnowcal
2-Aircraft
3-LiiM Pnenom.
4-Birte
S-doodj, Dust, etc
C-bnaffic M o .
'• Psycho lofi CM
S-Urrkaow
MHtut
Total
g
Number
Certain
2-
7
1
0
$
JJL
Doubtful
3
//
2-
0
0
0
0
/
2_
If
Total
5
f
I
0
0
3
3
It3
7
p/y
Certain
» • *
1?.?
l/$
/ i
0.0
0.0
Vj
,?1
i k
> « C m t
Doubtful
Y.I
/r.a
0.0
0.0
0.0
0.0
/ £
0.0
4/1
Ay
ToUl
fa
37.7
/4-J
IL
0.0
0M
4-7
47
4-7
1*.
r 6£/S//7-A'Erss
Nunbet
Certain
7
32-
o
-Ai
/y
jl
XJ_
6
IJ1
Doubtful
(7
2-7
3
/
0
O
£_
60
Total
IS
Sf
J
X
1
IS
H-
i
179
Certain
K.I
Jl
17-f
0J
0.
0
0
0
0
0\
0
.0
+
DoubHu
0>
/
0
0
/
0-
/>
Total
/
0
0
D
1
0
0
0
0
P«Cent
Certain
ay
0.0
CD
JA
0.0
0.0
0.0
do
0.0
O-O
66-7
Doubtfu
f{.7
0.0
0.0
0.0
/*• 7
00
0.8
0.0
£0
3Z3
Total
#7
/{.7
0.0
0.0
0.0
/6.7
0.0
00
•OJ
/?f?/6HrF8 rtf/iy MooAt
Number
Certain
J*L
JA
~l
-±
. 0
M
LL
-1
ZIS
Doubthi
ti
4/
3
0
0
0
0
0
4'
//?
Total
3S
130
41
?
I
0
tt
/r
33y-
PdCent
Certain
JA
SM
AA
/ /
Ad
0>.t
0.0
O.L
/r.3
Ad
AM
Doubtful
at
0.0
0.0
0.0
0.0
0.0
IS
Total
in-i
*)4
ir-3
A.7
0 3
0,0
t..o
11.2
+.s
100.
NunAer .
Certain
A
3
S
/
0
0
0
0
//
0
JZ-I
Doubtful
0
f
2-
2-
0
0
0
I
0
0
/3
Total
/
/ /
7
3
0
0
0
(
II
0
3H-
Percent
Certain
J-lft
IY.7
JA
AO
0.0
0,0
0,0
m.
m
Doubtful
0.0
i ^
5f\
0.0
0.0
0.0
?1
0.0
0.0
JfJ.
Total
M.7
M
00
0.0
0.0
a.«|
0.0
J00.
Numbcf
Certain
S
6
S
_JL
-JL
3
_£
J4-
0
Douutfu
3
X
3
/
J
&
0
Total
%
6
2-
1
0
3
IC
?
PaCnt
Certain
MA
11.1
Cl
1.0
0.C
0.0
(,.)
do
16.H
/.o
57.1
Doubtful
i-l
IIA
6.1
l-o
1 0
O.0
v./
0.6
4-1
U2.f
Total
to, 3
ft.*
12,9
fO
u
41
A»-t
<>-\
1st.
Evaluation
O-Balloon
1-Astronomical
2-Airctatt
3-UeMPhcnw.
4- Birds
S-Clouds, Dust etc
6-lnsutfic Info.
7-PsydvlO(ical
S-Unknoan
W ) t h «
Total
Ntflnbcf
Certain
/
/
J_
0
O
_£_
1
O
JL
0
$-
Doubtfu
/
0
1
0
0
0
0
0
0
Total
2.
I
2.
0
0
0
1
0
I
0
7
Pei C a t
Certain
/Jtl
0.0
M
JM
/U-.3
0.0
Uh3-
JLO
Doubtfu
/A3
0.0
0.0
0.0
0.0
0.0
0.0
10
0.0
ISA
Total
ty.3
Uf.6
10
0.O
0.0
/Hr3
0.0
>+3
0-0
/op.
Number
Certain
me
ISA
231
l l
-JJ.
_JL
/til
-21
m.Si
V0~?4
Doubtful
7f
Iff
i?-0
f
/+
0
3
0
/ /
Total
7-19
772
311
2-1
' /*>
•6
/u
77
1443
Pe Cent
Certain
9.i
IAl
11.1
AA
O.f
6.1
I3.Q
JA
i-l
Doubtful
td
4-I
4-3
0-1
6.1
^•?
0.0
0.1,
0.D
04
Ml
Total
•\\s
(.1
OA
/3.0
a.a
^4
/to.
Nutter
Certain Doubtful Total
Percent
Certain Doubtful Total
Number
Certain Doubtfu Total
t
PerCait
Certain Doubtful Total
212
, 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.