Figure 1
The diagram is titled “Identification of studies via databases and registers”. On the left, three vertical stages are labeled “Identification”, “Screening”, and “Included”. The main flow consists of text boxes connected through downward arrows. The first box reads “Records identified from: W o S (n equals 6,951), E R I C (n equals 1,860), Dialnet (n equals 7,734), Sci E L O (n equals 28), Scopus (n equals 3,312)”, which is connected downward to “Records screened (n equals 19,885)”. This is connected downward to “Reports sought for retrieval (n equals 1,760)”, which is further connected downward to “Reports assessed for eligibility (n equals 1,634)”. A final downward arrow leads to “Studies included in review (n equals 46)”. From the main vertical flow, several rightward arrows connect to additional text boxes. From “Records screened (n equals 19,885)”, a rightward arrow leads to “Records excluded (n equals 18,125)”. From “Reports sought for retrieval (n equals 1,760)”, a rightward arrow leads to “Reports not retrieved (n equals 126)”. From “Reports assessed for eligibility (n equals 1,634)”, a rightward arrow leads to “Reports excluded: Quantitative method, No article, Not transferable method, Epistemological studies, No participation”.Record selection scheme. Source: Authors' own work