Factors That May Make It Difficult to Draw Conclusions from the Research

Multiple Choice

Factors that may make it difficult to draw conclusions from the research evaluating the effectiveness of separate pull-out programs include all of the following EXCEPT

A) the varying quality of instructional practices used in pull-out programs.
B) the heterogeneity of students placed in pull-out programs.
C) the heterogeneity of placements classified as "pull-out".
D) the lack of research available.