This study investigates the extent to which the fluent life partners (LPs) of persons who stutter (PWS) understand the effect stuttering has on their partner who stutters' communication attitude. This was accomplished by administering the Communication Attitude Test for Adults Who Stutter (BigCAT; Vanryckeghem & Brutten, 2018), a subtest of the Behavior Assessment Battery (BAB; Vanryckeghem & Brutten, 2018). The BigCAT was administered to 33 PWS and a modified version was administered to their LPs via Qualtrics, an online survey software system. Between-group total score comparison revealed no significant difference in total scores, and a low-medium score correlation was evidenced. Within both groups, participants age and gender did not have a significant effect on total scores. The perception of stuttering severity was found to significantly influence BigCAT scores within each group. No differential effect of duration of relationship on score agreement was found to exist. A high Cronbach Alpha coefficient was obtained for both test forms. Between-group item score comparison revealed that only answers on two out of the 34 items differed significantly. They were related to frequency of speech disruption and avoidance of persons, places or situations. Item 24 had a perfect correlation between the two groups and relates to common behaviors PWS exhibit in trying to attain more fluency. Overall, the findings of this study show that LPs of PWS have a general understanding of the impact stuttering has on their partner who stutters' communication attitude.