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
I'Astrommical
2-Aircraft
3-LisW Phenom.
(•Birds
5-Clouds, Dust, etc
6-lnsuflic. mfo.
7-Psycnolo|ical
I-Unkmwn
9-Othe-
Total
Evaluation
O-Balloon
1-Astnnomical
2-Aircraft
3-Lifht Phenom.
4-Birds
5-Clouds, Dust, etc
E-lnsuffic. Info.
7-Psycholo|ical
8-Unknown
M t h e r
Total
Evaluation
O-Balloon
1-AstronomicJl
2-Aircraft
3-Light Phenom.
4-Birds
5-Clouds, Dust, etc
6-lnsuffic. Info.
7-Psychological
J-Unknown
M B i e r
Total
Evaluation
0- Balloon
1-Astronomical
2-Aircraft
3-Light Phenom.
(•Birds
5-Clouds, Dust, etc
6-lnsuffic Info.
7-Psydnk>(ial
»• Unknown
Total
? /
ALL
Number
Certain
j 2
T'-i
11
nsfo
/04,
/rfj'0
Number
Certain
d -
o
O
O
o
2.
3.
0
/j~
fMAt
Doubtfu
O
o
o
o
0
o
o
o
/
/
Total
S
S
-2
J2S
fit
Doubtfu
4.0
/I 0
S>0
a.o
0.0
0,0
O&
• £
Total
V-3
0.0
40
* • #
£.2
/*„•/
/er Cent
Doubtful
0.0
/O0.0
0.0
0.0
0.0
0.O
0.0
0.0
&. 0
/04rf
j
Tota
0,0
0.0
0.0
4.0
4,0
0,0
4.0
0.0
/40.
Number
Certain
3
z.
/
0
0
0
1
0
1
0
/0
l/IT/t
S
Doubtful
0
0
0
•O
O
0
0
O
O
0f
Total
3
3
_ i _
0
0
0
1
0
0
?/
PerCent
Certain
3L7.i
/t.2
SL
0.0
0.0
0.0
1/
0.0
273
0a
fa3
0A
Doubtful
9/
E£TS
/Is,
Number
Certain
/
O
O
O
O
O
O
,
Doubtful
0
0
O
O
O
O
O
Total
/
0
0
O
O
O
O
/
Total
27, &
f/
0.0
0.0
0.0
rtain
a
0
A
0
0
/
t
Doubtful
/
O
O
O
O
a
0
0
O
/
Tota
p
0
0
P
0
0
/0
Per Cent
Certain
J4.0
10,6
0-0
d.O
00
20. i
0#
O.0
/04
fo.e
Doubtful
/0J
00
(?•/)
00
4.0
0.0
0/)
'4
Jjto
20/)
Total
-&6
20 0
4/)
00
04
4ri
a-o
0-0
/00.
Number
Certain
J£-
_^_
0
1
n
134.
LESS
Per Cent
Certain
&£
O.O
0.6
00
4.6
fi.o
AO
S6.6
IOOO
Doubtful
0.0
0.0
a .6
0,0
Ob
0.6
Total
Q,0
fj 0
(.0
fit?
06
t.Q
/oo,
/? S~/
Number
Certain
0
0
0
0
0
0
1
0
3
Doubtful
_j
0
O
O
O
0
O
O
O
1
Total
1
/
/
O
O
C?
O
/
O
4
Certain
•»?/•«
o.o
0.0
00
00
2S.o
O.O
?s.o
Per Cent
Doubtful
O.0
IS. 6
0.0
0.0
OO
0.6
0,0
ZS.o
Total
to'r>
j^.n
*t~,o
00
6.0
i.o
&0-
ts.d
6-0
/00,
Doubtful
3S
0
.0
1
, f
13
r/A/6
T/f/W
Total
00
J*
33.
_ ^ _
0
s
J7
7
2.47
S
PerCent
Certain
/?/./
7.3
t.s
/.L
0.0
0.4
Co
Jj.
/8,6
IL
704
P0i£.
Doubtful
A-4
3-7
4-sr
0.0
U
0.0
c.4
0.0
Jf£
Total
A.0
2 y
$ '?>
V* f
PerCent
Certain
37S
18.i
£.2
0.4
0-0
0.0
£2
0()
it.7
Doubtful
6.x
4.0
041
4-0
6-0
/j..r
Al.
Tota
ff-Y
st
4.0
0.{
'OS,
/ ?. 4 ^
Number
lertain
Sa
f
0
2
-j—
4-
3.
/7
73.
Doubtful
3.1
7
/
/
0
0
0
/
J~0
Total
SI
1 /7
3
2
4
/ r
/J-7
Certain
/i.L
j-f
I)
0.0
2-4
o.l
2,1
(•&•
S.f
Lo.1
5er Cent
Doubtful
/6..J'
jr.*'
/* L
X4
0.?
0.0
0.0
0 0
o.S
39.4
Total
/a/
110
X.I
/.(*
/• ?
Number
Certain
/
* •
1
—&-
O
O
/
a
a
Doubtful
a
• _ j
/
0
0
0
0
0
0
4
Total
/
Jf
A
0
0
—ZL.
1
0
/&
Pel Cent
Certain
£•?
fi.o
0.0
/*.S
#•0.
7~fo
Doubtful
fi.O
/ / /
/ a
t>ro
0.0
o.a
0.0
0.0
0.0
&~0
Total
&JL
0.0
0.0
0.0
/ f f
r.-A
0.0
Number
Certain Doubtfu
r /
M/L£TJ
Total Certain
Per Cent
Doubtful
#00A
Total
Number
Certain
/
r
a
0
C
0
1
1
-£.
Doubtfu
1
O
O
0
O
O
O
O
Total
3
C
2.
0
0
1
0
1
1
/4-
Certain
7.1
0,0
0-<?
00
0.0
7-'
0.0
7'
^4-3
PerCent
Doubtful
14.1
7.1
J4'• i
0.0
i 0
Oo
O.o
0,0
e.o
O.o
/J--7
Total
•?/.?
17-1
0.0
0,0
0.0
7,1
7-f
1/
/oo,
Number
Certain Doubtful Total Certain
"ei Cent
Doubtful Total
207
J 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.