This paper organizes and evaluates 18 studies dealing with attitudes based on language differences which people possess toward others. Special consideration is given to the area of teacher-student relationships. The authors present a synopsis of each of the 18 studies, considering such details as purpose, speakers, judges, stimulus materials, measure, factors of speech studied, and findings. A summary of selected statistical data is presented, followed by a discussion of the general results of the studies, considering ethnic and dialect identification, speech quality, social and personal factors, and teacher-student relationships. The final sections of the paper include an evaluation and critique of the study and a discussion of conclusions and implications. (VM)