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The various kinds of indicator each have advantages and disadvantages. According to recent ideas about indicators for sustainable development, an indicator should balance "accuracy" and "resonance"; or as termed in this report, Informativeness over against the psychological factors of Involvement, Relevance and Ability. Unfortunately, the empirical data in this area is incomplete, so the report's conclusions are tentative, but do illuminate where further research would be most useful. The report concludes that there is often a tradeoff between informativeness and psychological impact, so balances must be struck. However it is generally desirable to make indicators as clear as possible, for which certain guidelines are suggested. |