Social impacts may be ‘real’ or ‘perceived’ and measures must be able to cope with both dimensions. That is, a
so-called ‘real’ impact can be measured with objective data that verifies its existence. An example of this is the
level of traffic congestion which is a quantifiable outcome, although attribution to a particular cause of the traffic
congestion may be difficult to make. By contrast, a ‘perceived’ impact is purely a personal view of that impact
(Ap & Crompton 1998), although again, this view may be ‘contaminated’ by community discussion or media
attention, although Langford (2001) argues this view is far too simplistic.
Social impacts may be ‘real’ or ‘perceived’ and measures must be able to cope with both dimensions. That is, aso-called ‘real’ impact can be measured with objective data that verifies its existence. An example of this is thelevel of traffic congestion which is a quantifiable outcome, although attribution to a particular cause of the trafficcongestion may be difficult to make. By contrast, a ‘perceived’ impact is purely a personal view of that impact(Ap & Crompton 1998), although again, this view may be ‘contaminated’ by community discussion or mediaattention, although Langford (2001) argues this view is far too simplistic.
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