Project Blue Book Special Report No. 14: the Battelle statistical study, 1955

Late December 1951. Capt. Edward J. Ruppelt, head of the Air Force's UFO project, met with the Battelle Memorial Institute in Columbus, Ohio. The informal contract became known as Project BEAR. Battelle's part was kept quiet. The finished report went out under the name of the Air Technical Intelligence Center at Wright-Patterson Air Force Base, to preserve the institute's anonymity.

Coding began in late March 1952. About 30 characteristics from each report went onto IBM punched cards. Four scientific analysts sorted every case into knowns, unknowns and insufficient information, and graded its quality from excellent to poor. The bar was high. Two analysts could call a case known. All four had to agree to call it unknown.

About 3,200 cases. 69% identified. 9% with too little information. About 22% unknown. The better the case, the harder it was to explain. 35% of the excellent cases stayed unknown, against 18% of the poorest. On colour, number, shape, duration and speed, the unknowns differed from the knowns at a highly significant level.

The analysts picked twelve of the best unknowns to see whether a model flying saucer would emerge. Case 10 was one of them. 24 May 1949. About 1700 hours, roughly 2½ miles from the mouth of the Rogue River, Oregon. Five witnesses, two of them employees of the NACA Ames Aeronautical Laboratory. Through binoculars the object looked "of metallic construction", pancake-shaped, about 30 feet in diameter. "Object appeared round and shiny, something like a 50-cent piece, viewed from below," one wrote. Another saw a "triangular fin" and "neither sight nor sound of any driving force." After 2½ to 3 minutes it "moved off in a horizontal flight at a gradually increasing rate of speed, until it seemed to approach the speed of a jet."

Still, the study "failed to reveal even a rough model." The report concluded it was "highly improbable" that any of the reports represented technological developments beyond present-day knowledge.

25 October 1955. Secretary of the Air Force Donald A. Quarles went public. "On the basis of this study we believe that no objects such as those popularly described as flying saucers have overflown the United States." He added that "even the unknown 3 percent" could have been explained if more complete data had been available.

Critics pointed to the gap. The report said about 22%. The Secretary said 3 percent. Bruce Maccabee found that the analysts' conclusions "were usually at odds with their own statistical results," and he called the no-model argument "fuzzy reasoning." Jennie Zeidman, assistant to J. Allen Hynek, traced Battelle's hidden role and tied the group to Project Stork.

Skeptics answered that astronomical cases drove much of the difference. With those removed, most gaps shrank to the 3 to 5% level. Allan Hendry argued that the Battelle group would never have attempted a statistical comparison if it had understood "how loose the data were." Robert Sheaffer accused Stanton Friedman of cherry-picking the report. In 2024 the All-domain Anomaly Resolution Office summarised the study as finding that "all cases that had enough data were resolved and readily explainable."

Hynek's annotated copy is now held by the Center for UFO Studies. Leon Davidson reprinted and analysed the report. Project Blue Book Special Report No. 14 is still read two ways. As proof that most sightings have ordinary causes. Or as proof that the best ones never went away.