In any research involving sensitive questions, respondents tend to refuse to answer such questions or give evasive response. Many randomized response sampling techniques were developed but could only handle two answer options; ‘Yes’ and ‘No’, among which are , e.t.c. In this paper, a tripartite randomized response sampling technique was developed to handle the three answer options: ‘Yes’, ‘No’ and ‘Undecided’,based on the modification of  model.
Keywords: Stigmatized attributes, Tripartite Randomized Response Technique (TRRT), response and non response bias
Journal of the Nigerian Association of Mathematical PhysicsVolume 19 (November, 2011), pp 119 – 122