It would have been more efficient to have one observer make matches on a number of the lights before being replaced by another observer. ... During the experiments two unanticipated problems arose that should be corrected in any future study that may be designed according to the same basic ... However, the 37 ms flash duration used is in the range typical of commercial rotating warning lights.
|Title||:||Some psychophysical tests of the conspicuities of emergency vehicle warning lights|
|Author||:||Gerald Leonard Howett, Law Enforcement Standards Laboratory, National Institute of Law Enforcement and Criminal Justice|