बुद्धि के समूह कारक सिद्धान्त के प्रणेता है ? (RPSC, II-ग्रेड सामान्य ज्ञान 2011) - What is the group factor of intelligence the principle of principle? (RPSC, II-Grade Common Knowledge 2011) - Buddhi Ke Samuh Kaarak Sidhhant Ke Praneta Hai ? (rpsc , II - Grade Samanya Gyan 2011) PSYCHOLOGY in hindi, Shiksha Aivam Baal Manovigyan Therston question answers in hindi pdf Speer Main questions in hindi, Know About ThornDike PSYCHOLOGY online test PSYCHOLOGY notes in hindi quiz book Thomasn