“…Others used only one area: Motor Development (Almeida & Formiga, 2010;Brito et al, 2009;Menezes et al, 2013); Language (Lorenzo et al, 2010;Sousa et al, 2013); Language and Socialization (Machado & Bello, 2015) or Infant Stimulation (Taques & Rodrigues, 2006). Nine studies did not provide data regarding the application of the OPI, two claimed they followed the instructions contained in the manual (Almeida & Formiga, 2010;Taques & Rodrigues, 2006), and only one study (Brito et al, 2009) pointed out changes in the evaluation criteria of the items in relation to the suggestions contained in the manual (Williams & Aiello, 2001). Table 1 shows that the OPI was used as the only measure (58.3%) or integrated with other instruments, in which case the "Denver Developmental Screening Test" (Frankenburg, et al, 1999(Frankenburg, et al, /2018 was the most used one (Gejão et al, 2009;Sousa et al, 2013).…”