THE WHITE-SUITED BLACK SUBJECTS are rendered with varying degrees of realism: There is the chalky brown man at left, who possesses all the charm of a department store mannequin; the androgynous youth at right, with unfurled scarf and ghostly tinted glasses; and, of course, the woman at the center of the work, whose adjacent nude double seems to both teasingly recede into and forcefully protrude beyond the group. Barkley L. Hendricks executed this large-scale canvas, What’s Going On, in 1974, and it is perhaps the most striking of what the artist calls his “limited palette” works, with its