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4. Outline and assessment of the evidence<br />

Figure 4.1: Evidence maps for each assumption<br />

Key<br />

STRONG = Body of evidence rated as ‘strong’ overall.<br />

MODERATE = Body of evidence rated as ‘moderate’ strength<br />

overall.<br />

WEAK = Body of evidence rated as ‘weak’ overall.<br />

+ = Positive findings supporting assumption.<br />

- = Negative findings refuting assumption.<br />

o = Neutral findings ambiguous in relation to assumption.<br />

* = Numbered study assessed as high quality (remaining are<br />

medium)<br />

43

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