Fig. 1.

Effect on WISC-R scores of a recent homicide occurring within the block group, census tract, or neighborhood cluster, respectively, among African-Americans in the PHDCN. Coefficient values are shown for all block group estimates and for significant estimates at all levels. Sample sizes: Block group estimates are based on 2,294 assessments among 1,082 respondents; census tract estimates are based on 2,381 assessments among 1,106 respondents; and neighborhood cluster estimates are based on 2,393 assessments among 1,111 respondents. *P < 0.10; **P < 0.05; ***P < 0.01.