CastoG. (1984). Final Report. Logan, UT: Early Intervention Research Institute.
2.
CohenI. (1977). Statistical power analysis for the behavorial sciences (revised ed). New York: Academic Press.
3.
DunstC. J.SnyderS., & MankinenM. (in press). In WangM.WalbergH., & ReynoldsM. (Eds), Handbook of special education: Research and practice (vol 1–3). Oxford, England: Pergamon Press.
4.
GlassG. V. (1978). Reply to Mansfield and Bussey. Educational Researcher, 7, 3.
5.
SnyderS. (1985). Meta-analysis and intervention literature: Issues of data structure. Unpublished doctoral dissertation, Purdue University, West Lafayette, IN.