“…The first indicator was a teacher nomination, for which teachers were asked to consider logical/analytic thinking, abstract thinking, mathematical thinking, scientific/technical thinking, language skills, learning ability, power of deduction/combination, broad knowledge, and special knowledge of a domain in the process of identifying gifted children (Heller, 2004). Despite clear instructions, teachers usually base their nomination of a gifted child on the assumption of innate giftedness by identifying those children who are able to excel with limited support (Lohman, 2005b;Subotnik et al, 2011) or those who are able to have a high level of achievement due to their hard work (Duckworth, Kirby, Tsukayama, Berstein, & Ericsson, 2010;Gagné, 2010). This indicator was therefore assumed to provide an indirect indication of giftedness.…”