Negative attitudes toward robots are considered as one of psychological factors preventing humans from interacting with robots in daily life. To verify their influence on humans' behaviors toward robots, we designed and executed experiments where subjects interacted with Robovie, which is being developed as a platform for research on the possibility of communication robots. This paper reports and discusses the results of these experiments on correlation between subjects' negative attitudes and their behaviors toward robots. Moreover, it discusses influences of genders and experiences of real robots on their negative attitudes and behaviors toward robots.