Since clear relationships exist between age, gender, and the occurrenc
e of different kinds of accident, safety researchers and educators nee
d to take account of recent work in developmental and environmental ps
ychology, which is leading to a revised view of children's environment
al competence. Studies of the development of risk perception and risk-
taking are first reviewed: these have identified three broad phases th
rough which children proceed, culminating in an understanding of the i
nteraction between their own perspective, that of other participants,
and characteristics of the situation itself in the causation of accide
nts. This broad picture is in line with the reformulations of Piagetia
n stage theory which have occurred in recent years: rather than being
''pre-operational'' or ''egocentric'' in a global sense, young childre
n's main limitations seem to be in applying the principles of routines
or drills from one setting to another, and studies of attention and m
emory show that the amount of information children are able to process
improves with age, as does their resistance to distraction. Three asp
ects of individual differences seem to have an influence upon risk-tak
ing, namely gender, reflection-impulsivity and family structure, and t
he findings are reviewed in each case. As children get older they expe
rience an increasingly wide variety of unfamiliar situations, and it i
s essential to understand the interaction between these age changes in
environmental circumstances and mechanisms of developmental change in
formulating programmes for safety education.