Table 1 Search terms for databases and search engines

AMED

(“The four square step test” KW) AND (valid* KW) OR (reliab* KW) OR (sensitiv* KW) OR (reproducib* KW)

CINAHL

(“The four square step test” KW) AND (validation studies MH OR validation therapy MH) OR (reliability MH OR reliability AND validity MH) OR (sensitivity and specificity MH) OR (reproducibility of results MH)

MEDLINE

(“The four square step test” KW) AND (validation studies MH OR validation studies as topic MH) OR (reliab* KW) OR (sensitivity and specificity MH) OR (reproducibility of results MH)

Web of Science

(“The four square step test” TS) AND TITLE-ABS-KEY: (valid* TS) OR (reliab* TS) OR (sensitiv* TS) OR (reproducib* TS)

SPORTDiscus

(“The four square step test” KW) AND (valid* KW) OR (reliab* KW) OR (sensitiv* KW) OR (reproducib* KW)

PEDro

(“The four square step test”)

Google Scholar

(“The four square step test”)