Population and sampling design- To achieve the objectives of the present research, data were collected from Jhenaidah Sadar upazila. Considering the result demonstration program practiced or observed by the farmers, Narikelbaria, Vupotipur and Chand villages under Narikelbaria and porahati unions of Jhenaidah Sadar upazilla was purposively selected as the locale of the study. The total number of the listed Boro farmers (1,165) in the study area was considered as the population of the study. According to Yamane's (1967) formula, sample size was determined as 90. In calculating sample size from the formula, 10% precision level, 50% degree of variability and value of Z = 2.57 at 95% confidence level were chosen. Then 90 farmers were selected by using simple random sampling method. Data were collected through face-to-face interview by using structured interview schedule from the selected respondents of the study area during 24 July 2014 to 20 August 2014. The methodology followed for measuring the dependent and independent variables are described below: Measurement of independent variables The selected characteristics of the Boro farmers include: age, education, farming experience, training exposure, farm size, annual income, organizational participation, extension media contact, innovativeness, cosmopoliteness, motivation and personality which were considered as independent variables of the study. The age of a respondent was measured in terms of actual years from her/his birth to the time of interview. Level of education of a respondent was measured on the basis of classes s/he had passed in formal educational institution. Farm size of the respondent was measured as the size of his farm (including rice and other crops) on which s/he continued her/his farm practices during the period of study. Annual income of a respondent was measured in thousand taka on the basis of previous year income by active members of a household from agriculture (rice, wheat, jute, mustard, pulse, vegetables, fruits and flower), livestock, poultry, and fisheries and non-agricultural sector (service, business, labor and other family members? income). In this study, farming experience score of a respondent was measured by the number of years of a respondent had been involved with rice cultivation in her/his entire life. Extension media contact score of the farmers was determined by summing the scores obtained from all the 16 selected extension media by using a four-point (0-3) rating scale. The extension media contact score could range from 0 to 48; where „0? (zero) indicates no extension media contact and „48? indicates very high extension media contact. Agricultural training score of a respondent was measured by the number of days that a respondent had received agricultural training in her/his entire life. Organizational participation of a respondent was measured on the basis of nature of membership in the concerned organizations by using a four- point (0-3) rating scale. Cosmopoliteness of a respondent was measured in term of her/his nature of visits to ten different places external to her/his own social system by constructing a four-point (0-3) cosmopoliteness scale. Innovativeness of a respondent was measured on the basis of the period of adoption of 15 improved agricultural technologies by developing a five-point (0-4) innovativeness scale. For determining the respondent?s personality, ten independent characteristics were carefully selected to develop four-point (1-4) personality scale. For determining the respondent?s motivation, seven independent statements were carefully constructed to develop four-point (0-3) motivation scale. Measurement of dependent variable Effectiveness is defined as the degree to which objectives are achieved and the extent to which targeted problems are solved (BusinessDictionary.com, undated). Effectiveness of result demonstration in transfer of BRRI dhan50 was the dependent variable of this study. The objectives of the result demonstration program were to increase knowledge, attitude and adoption of the farmers regarding BRRI dhan50 cultivation. These knowledge, attitude and adoption dimensions were used for measurement of effectiveness of result demonstration program. The effectiveness of result demonstration program in transfer of BRRI dhan50 was measured by combining and averaging knowledge, attitude and adoption scores of the farmers and expressed as percentage. Each of the dimensions was measured by developing concerned scale. Knowledge on BRRI dhan50 of a respondent was measured by asking 10 questions related to BRRI dhan50 cultivation which could range from 0 to 20. Attitude was measured by using Likert-type scale which contained 10 statements out of which 5 statements were positive and 5 statements were negative. Scores were assigned to these five alternate responses as 5, 4, 3, 2, and 1, respectively for each positive statement. In case of negative statements, the reverse scores were assigned. Attitude score of a respondent could range from 10 to 50. The adoption of BRRI dhan50 score was calculated by multiplication of score of area coverage and score of time. Area coverage score was measured on the basis of percentage of land allotted for BRRI dhan50 and then score of 0, 1, 2, 3 and 4 were given for 0.00%, 1-25%, 26-50%, 51-75% and 76-100%, respectively. For determining time score the respondent was asked how many years s/he had been cultivating BRRI dhan50 and then score of 0, 1, 2, 3 and 4 were given for no cultivation, up to 1 year, >1 to 2 years, >2 to 3 years and ≥ 4 years cultivation. So, the adoption of BRRI dhan50 score of a respondent could range from 0 to 16. Thus, the values of ES could range from 6.60 to 100.00%, where 6.60% indicates very low effectiveness and 100.00% indicates very high effectiveness of result demonstration in transfer of BRRI dhan50.