“Outliers and American Vanguard Art”

The National Gallery’s description of the show is off-putting—anyone curious about “historicizing the shifting identity and role of this distinctly American version of modernism’s ‘other’ ”?—but don’t be daunted. The exhibit features some 300 works that illustrate connections between notable outsider artists such as Horace Pippin and Janet Sobel and their more establishment contemporaries.