Based on the idea that tolerance for disagreement is not other-directed but rather reflects a personality trait maintained by individuals across time and situation, a study was undertaken to develop a measure of tolerance for disagreement that would help further the conflict conceptualization by being able to predict negative affective interactions with procedural or substantive disagreement. To assess individual tolerance levels for disagreement, a Likert-type scale was developed and administered to 384 educators. Initially, 35 statements were used, representing both approach and avoidance of argumentative situations specific to interpersonal and group discussion contexts. Items were worded both positively and negatively. The subjects were asked to indicate the extent of their agreement with each item as it applied to them in their own communication contexts. Analysis of the data resulted in a 20-item scale that reflected face validity as well as sufficiently high reliability consistent with the conceptualization of the unidimensional nature of the tolerance for disagreement construct. The findings suggest that, while individual tolerance levels of disagreement varied, the impact of such levels on conflict situations requires empirical investigation. (FL)