“…In the sample, 47 of the 61 studies generalized the study outcomes to the population in the study. Several studies generalized the study findings to a different grade level or age group (Ramírez, Verdugo, & Sánchez, 2000), another country (de Manrique & Signorini, 1994), or to the population in the study despite a small sample (Bandini et al, 2006). Still, others generalized to the entire population in the country (De Abreu, & Cardoso-Martins, 1998) and across countries (Abadzi, Crouch, Echegaray, Pasco, & Sampe, 2005).…”