The review found no eligible studies for this question.
Summary of findings: SLT may leads to lower number of dropouts for any reason compared with social support and stimulation (low certainty).
Summary of findings: SLT probably leads to higher functional communication compared with no SLT (immediate outcome) (moderate certainty).
Summary of findings: SLT showed no clear difference in number of dropouts (for any reason) compared with no SLT (follow‐up at 6 months) (moderate certainty).
Summary of findings: SLT A may leads to higher functional communication compared with SLT B (low certainty).
Summary of findings: SLT A probably leads to higher severity of impairment compared with SLT B (moderate certainty).
Summary of findings: SLT showed no clear difference in number of dropouts (for any reason) compared with no SLT (immediate outcome) (moderate certainty).
It is very uncertain whether summary of findings: SLT changes functional communication (6 months compared with no SLT (follow‐up at 6 months) (very low certainty).