A study was conducted in districts of Karimganj, Lakhimpur and Jorhat of Assam to assess the extent of yield gap of most widely adopted AAU recommended rice variety in the state. A purposive sampling technique was followed and statistical methods such as percentage, frequency, mean and ranking was used for analysing the data. Data were collected through personal interview method during the period of 2010-11. A total of 360 respondents were interviewed with the help of the structured schedule. The highest yield gap in the study area was obtained in the year 2006-07 (- 10.44 q/ha) followed by 2008-09 (- 8.16 q/ha) and 2007-08 (- 7.56 q/ha). The yield gap in the year 2006-07 was increased by the poor yield obtained throughout the sample villages of Jorhat. The yield of most adopted recommended HYV "Ranjit" had positive and significant correlation with economic motivation (r = 0.4151**), scientific orientation (r = 0.2703**) and training exposure on rice (r = 0.2159*). The regression coefficients of educational level (b = - 4.0284**), number of family members engaged in farm activities (b = - 2.8938*) and economic motivation (b = 5.8606**) were found to be significant with the yield of most adopted HYV "Ranjit".