The evidence base on home visiting in tribal communities is fairly small. The HomVEE tribal review has identified 49 effectiveness studies of home visiting program models either used in tribal communities or that included a sizable share (10 percent or more) of American Indian and Alaska Native (AIAN) families. Forty-one percent of these used a sufficiently rigorous study design to provide unbiased estimates of program impacts. (The more rigorous the design, the more likely it is that a study’s impacts were caused by the program model itself, rather than by other factors.) Only six of them specifically examined the effect of a program model with tribal populations (meaning the studies included samples made up entirely of AIAN participants or reported findings by tribal community affiliation).