If a Researcher Is Interested in Whether a New Training

Multiple Choice

If a researcher is interested in whether a new training technique affects reading achievement scores, and the group chosen for the study is already high in reading-achievement levels, the lack of any further significant increase may be due to the

A) researcher having chosen the .05 rather than the .01 level of statistical significance
B) halo effect
C) Hawthorne effect
D) ceiling effect