A-B-A-B design is a single-problem layout in which researchers take a baseline measurement after which introduce the intervention and degree the equal variable again.
Measurement is the manner of contrast of the given physical amount with the known standard quantity of the same nature. as instance, measurement of duration the use of Vernier Callipers and dimension of the diameter of the cord the usage of screw gauge.
The system of measurement numbers with bodily quantities and phenomena. size is fundamental to the sciences; to engineering, construction, and other technical fields; and to almost all ordinary sports
Without the ability to a degree, it'd be hard for scientists to behavior experiments or form theories. now not the simplest measurement vital in science and the chemical enterprise, it is also critical in farming, engineering, creation, production, trade, and several other occupations and sports.
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