“…In summary, previous studies have demonstrated that the majority of research published in gifted education journals is not evidence-based research (Carter & Swanson, 1990;Friedman-Nimz et al, 2005;Hays, 1993;Rogers, 1989; see Table 1). One potential explanation for the very small percentage of experimental or quasi-experimental designs in the gifted education literature may be due to the methodological problems that interfere with carrying out field research.…”