The relative importance of warning components (signal word, instructio
ns, consequences) was assessed with respect to the perceived effective
ness of the football helmet warning label created by the National Oper
ating Committee on Standards for Athletic Equipment (NOCSAE). We also
investigated whether the addition of a hazard statement or a graphic s
ymbol portraying improper helmet use would increase the NOCSAE label's
perceived effectiveness. Football players (N = 484) rated one of six
versions of the label: (a) the original NOCSAE label; labels with dele
ted (b) signal word, (c) instructions, or (d) consequences; and labels
with an added (e) hazard statement, or (f) symbol. Contrary to our hy
potheses, deletion of the signal word, instructions, or consequences f
ailed to decrease the label's perceived effectiveness. However additio
n of the hazard statement and symbol significantly increased perceived
effectiveness. Implications for NOCSAE label design and future resear
ch are discussed.