According to Osgood et al. (1957), the method has to use a scale that can accurately map identification and localization of attitudes in a subject's thought. Furthermore, to obtain ‘semantics’ of objects, subjects have to be given a word and asked to rate it with a variety of opposing adjectives along a seven point scale. Osgood contended that the adjectives picked have to be evaluative, because the method consists in listing the semantic attributes of the product to analyze and carry out user tests in which the user must assess the product according to these attributes. The attributes are often defined by pairs of antonymous adjectives which lie at either end of a quantitative scale (Table3.1 from Hsu et al., 2000).