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 O-Balloon 1-Astronomcal 2-Aircraft 3-Lisht Pherm. •-Birth 5-Clowis, Dust, etc 6-lnsuffic kilo. , 7-PsYcholopal 8-UnkMM M i n e r Total Nunbff Certain Doubtfu Total y PerCent Certain 7 Doublfu Tobl Nunter Certain Doubtful Total - , V P a Cat Certain J y DoublU \ Total Number Certain Doubtful Total A Percent Certain / A * V y Jtouttful Total Nuabrr Certain Doubtful \ Total V PeiCml Certain y DtaiMlul tj^> Total Evaluation 0-Balloon 1-Astnmnical 2-Aircnft 3-Light Phenom. «-Binh 5-Clowts, Dust, etc. 6-lnsuffic kito. 7-Psycholo|ical S-Unknoon ; M t h e t Total Number Certain Doubtful s Total \ ) PerCent Certain Doubtful Total Numbn Certain / 0 o .JL 1 1 U Doubtful 0 1 Q 0 /? 0 0 0 O 0 1 Total / / 0 0 o 3 1 U I /,? Percent Certain *7 p.e> p.o 7.7 7.7 12.3 Doubtful a? 7T fit at> to 0,1 oti 4P 4t 0.0 7.7 Total 77 7-1 JS:o &,e 6-e Q.a 71A 7,7 r.? /0O, J~L>J.f Nuc*M :ertain 6 5 0 1 o o f o IZ JtL Doubtful D I ",£ 0 P 0 0 0 D 7 Total 7- (> O r.2. 13- 16 S!T PerCent Certain / / r 9.1 0.0 i * 0.0 ao /«.S 0.0 XI f 29.1 87,3 Doubtful 0,0 ?.(, 0,0 0$ 7,t 0,0 9-0 H,1 Total /(?if /,f ao (?.O Mr 7-11 160, A usurr NrabH Certan t> i 0 0 0 p 0 7 0 IT Owtitfu 0 1 a Q 0 0 0 a 0 1 e. / Total P 7 (? t>,e p.o 00 w I?S 0-f Aff 00 /OP. Evaluation 0-Balloon 1-Astfononical 2-AircraH M i g h t Phenoa. 4-Binb 5-Clouds, Dust, etc 6-lnsuffic Info. 7-Psycholocieal 8-Unknom M t h e t Total SE-p7-jrMg£r/<> Nmber Certain 0 / o 0 0 0 1 ( 3 0 / Doubtfu 0 o 0 0 0 0 0 0 10 o 0 Total 0 t 0 0 0 0 1 1 0 PaCeat Certain 0.0 fC7 M> P.fi 0.6 (LI if-7 SB.O 0./) (00,0 Doubtfu (?,0 OO 0-0 (?,6 M ?, P 0 0 0 / 2. O 12. Doubtful 00 0.0 0.0 fl.Q 6.0 Doubtful P.0 T?J O,0 0,0 0,0 04 0-0 00 0.0 0,0 Total p.o tfifi 0,0 313 o.e 0.0 0,0 o.o 0.0 0,0 106. Numbet Certain o 6.0 0.0 0.0 at 0.6 o.t o.o ao /OOJ Doubtful A0 0.0 0.0 0O 0-0 IP-O 0-0 ao Tom op mo t,o Ob 60 00 Q6 0.0 110
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.