Correction
There was an error in "Digit-Symbol Performance in Methadone-Treated Ex-Heroin Addicts," by Philip W. Appel, Ph.D., and Norman B. Gordon, Ph.D. (November 1976 issue). The sentence in the last paragraph of the results section (p. 1338) read, "The value of r... for all patients [was] +.296 (df=46, p>.05)." It should have read, "The value of r... for all patients [was] +.296 (df=46, p<.05)." The staff regrets this error.
