The present study examined the ability of signal words (e.g. DANGER) a
nd their associated panels to convey hazard-level information, both in
dividually and redundantly, Subjects constructed signs on a computer f
or 30 different scenarios, The use of signal words and panels was obse
rved as a function of the level of hazard associated with the scenario
. The results show that (a) the connoted level of hazard for signal wo
rds is not perceived as moat standards suggest, (b) certain panel comp
onents (e.g. colour and symbols) are most critical in conveying hazard
-level information, (c) no current set of standards or recommendations
specifies panel formats which use these panel components optimally, a
nd (d) the use of signal word panels was not necessarily based on the
choice of signal word or on the level of hazard for the particular sce
nario, The results suggest the need for a re-evaluation of current sig
nal word hierarchies. (C) 1997 Elsevier Science Ltd.