R. Greenwald et al., INTERPRETING RESEARCH ON SCHOOL RESOURCES AND STUDENT-ACHIEVEMENT - AREJOINDER TO HANUSHEK, Review of educational research, 66(3), 1996, pp. 411-416
Hanushek's (1996) comment illuminates some of the ways in which he dif
fers from us in approach and interpretation. Hanushek misunderstands t
he interpretation of meta-analytic results when (as in the present cas
e) studies produce range of different, but positive effects. We disagr
ee with Hanushek on the role of statistical independence. While we do
not regard multiple analyses of data on the same individuals to be as
informative as analyses of independent data sets. Hanushek treats the
two as equivalent. While publication bias remains a concern in researc
h, we show that even overcompensating for its likely effects does not
substantially influence our results. While disagreements persist, scho
larly debate should not obscure the fact that the best evidence, upon
close inspection and the application of appropriate statistical method
ology, demonstrates that student achievement is related to resource av
ailability.