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Exact(8)
Performance bias was unavoidable in this instance as the operators were directly involved in the interventions so the judgment was lenient yet objective due to the impossibility of blinding.
A second point is the impossibility of blinding in data recording.
Given impossibility of blinding the intervention, we decided to withdraw the information regarding the intervention from the controls.
Given the impossibility of blinding, hospital admissions will be decided by the independent treating physicians, not by the investigators, wherever possible.
A closer analysis of the studies with a modified JADAD score [ 17] resulted in scores between 1 and 2 due to the impossibility of blinding in music therapy.
Because of the subjective nature of the outcome and impossibility of blinding participants to their treatment, improvements in self-reported sleep quality may have been subject to expectancy effects, as exercise is commonly believed to improve sleep quality.
Similar(52)
The major limitation in randomised trials of this sort is the impossibility of implementing blinding of the participants or field workers, once they visited the home.
The study's limitations include the impossibility of completely blinding the therapist due to the nature of the intervention and the lack of a control group (undergoing no treatment) for comparison with the other groups.
The greatest concern was impossibility of blindness of the treatment.
Relatively weak statistical power and impossibility of blindness of the treatment.
In addition, the subjects who were third-year undergraduate EFL students, their familiarity with one another, their proficiency level, and the impossibility of performing blind assessment could have had limiting effects on the results.
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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com