“…The measurement of reliability in an instrument, per Hernández, Fernández and Baptista (2003), is the extent to which its repeated application to the same subject produces the same results. Similarly, the validity, or repeatability, as argued by Moskal and Leydens (2000), Stellmack et al (2009) andThaler, Kazemi andHuscher (2009), is the extent to which the instrument measures the variables' underlying interest. Finally, in the literature associated with the rubric's design the term precision appears (Brown, Glasswell, & Harland, 2004), which refers to the psychometric position of quality between validity and reliability indicators, which is normally expressed by an exact percentage of correlation between the two factors (Cho, Schunn, & Wilson, 2006;Jonsson & Svingby, 2007).…”