Dimensions and Design of swimming pool fences and balcony - ANEC

After 150 s, in groups 1 and 2, the experimenter
placed 2 boxes (dimensions 30 cm length x 20
cm width x 10 cm height, and 30 cm length x 20
cm width x 20 cm height) close to the barrier,
offering additional but not compulsory aid to
cross the barrier. In group 3 the children knew
that the boxes were available and could get
them whenever they wanted.
The children were taken to the experiment
apparatus in small groups. The task was
performed by one child at a time. Visual access
to other children’s trials was allowed.
In all conditions the children were filmed from
behind. The video recordings were pasted into
movie fragments for analysis. The following
items were then considered: 1) success/failure
in crossing the barrier (with or without boxes),
2) time to cross the barrier (from the moment
of the first contact with the barrier, previous to
the climbing action, until contact with the floor
on the other side, or until the last visible frame
when contact was occluded by the height of the
barrier), and 3) passing technique (action modes
adopted for transposition).
3.7 Actions modes
The action modes adopted for the crossing of
the barrier were classified following the criteria
of action control and safety when transposing
the barrier. It was assumed that when crossing
a barrier with maximum control, children keep
their vertical posture, keeping the head above
the waist. Arms can move easily and balance
when transposing the barrier is not greatly
affected. The risk of falling is minimal (see Fig.
3). The second action mode is generally used
when the level of difficulty of the barrier
restrains the amount of options. In these
situations vertical balance is sacrificed in favour
of a position that offers a greater contact
between the body and the barrier. So, the barrier
is crossed with the head and waist at the same
level. This technique is more dangerous and
guarantees less balance than the previous one
(see Fig. 4). The third action mode is the most
dangerous one since it is characterized by
crossing with the head under the waist. In a way
this represents a situation of a probable fall (see
Fig. 5). Next, we present some examples of the
action modes described.
Dimensions and design of swimming pool fences and balcony and stairs barreirs to protect children from falling and from passing through, bellow or above
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