Original sentence: A meta-analysis looking at the contribution of eye movements to treatment effectiveness in EMDR concluded that eye movements were not necessary to the treatment effect across all studies.A researcher from London's Institute of Psychiatry confirmed the findings and stated that if eye movement was not relevent to EMDR, then all that remained was cognitive behavioral therapy
Edited sentence: 15 (eye movement over no eye movement) is significant.However, this analysis has a methodological flaw.On the other hand, a meta-analysis looking at the contribution of eye movements to treatment effectiveness in EMDR concluded that eye movements made very little difference across all studies, with an exception of those individuals who had a formal diagnosis of PTSD.The degrees of freedom used to examine the level of significance of the effect was based on the number of studies rather than the number of participants which is the convention.When this is corrected, the actual effect size obtained of r=