क्रियात्मक अनुसंधान में "पूर्व परीक्षण-पश्च परीक्षण एकल समूह प्रारूप" से क्या आशय है?

उत्तर: (B) A design where one group is tested before and after treatment — Pre-post single group: measure before intervention → apply intervention → measure after → compare. Simplest action research design. Limitation: no control group, so can't rule out other factors. But p...