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M2 is
Random Assignment
A method used in experiments where participants are randomly allocated to different groups to ensure each group is statistically similar, thus increasing the validity of the results.
Control Group
In an experiment, the group of participants that does not receive the experimental treatment, serving as a comparison to evaluate the effect of the treatment.
Distracting Sounds
Auditory stimuli that divert attention away from a focal task or activity, potentially reducing performance or concentration.
Learning Effectiveness
The degree to which learning objectives are achieved, often measured by the ability to recall or apply knowledge and skills.
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