Before addressing and comparing the Likert and Thurstone scales, we
             must first briefly discuss two conceptual elements: attitudes and scaling
             We must agree that an attitude, because of its psychological
             dimension, is hard to evaluate. We have no problem in measuring physical
             characteristics of a person, like height and weight, to which a numerical
             attribute can be easily associated, however, a psychological dimension is
             harder to measure. How can this be done' According to Hogg & Vaughan, we
             can measure a person's attitude by "asking questions about thoughts,
             feelings, and likely actions toward the attitude object". In this sense,
             each person's opinion can be measured by a numerical score, obtained by
             scaling his response and reaction to a certain object. This brings us to
             According to S.S. Stevens, "scaling is the assignment of objects to
             numbers according to a rule". From this point of view, the objects are
             represented by text statements (attitude text statements to be more
             precise). In order to address this, we have to solve the problem of the
             scale's dimensionality that is the number of dimensions. To exemplify
             this, height can be considered a unidimensional concept: the concept of
             height can be associated with one single number. Psychological concepts
             can however be more complex and several dimensions may need to be
             addressed, but this is not the case here. We will be discussing two
             unidimensional scales: the Thurstone or Equal- Appearing Interval Scaling
             and the Likert or the Summative Scaling.
             The Likert scale associates with each concept a number of possible
             reactions, from Agree (or Strongly Agree) with the concept to Disagree (or
             Strongly Disagree). In general, there is a mid-way element on the scale
             that can be labeled Neutral or Undecided, but most Likert scale will tend
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