The study aimed to investigate the tendency of non-native instructors who teach English as a foreign language (EFL) in terms of their behavioral, emotional and speech disorders while teaching in a class, or while speaking in front of public. The study adopted a quantitative case study research design. The participants of the study comprised purposefully selected 45 volunteer instructors (32 females and 13 males) who were teaching at the School of Foreign Languages of a state university in Konya, Turkey in 2015-2016 academic year. The data were collected via a 5-point Likert type questionnaire developed by the researchers, and was composed of 30 items and 4 sub dimensions. The data about the demographic information of the participants were analyzed using non-parametric tests such as frequency, percentage and mean scores, and the relationships between the sub-dimensions were analyzed via some parametric tests such as One Way ANOVA, Kruskal Wallis, and Mann Whitney U Test. The results revealed that the participant EFL instructors were like to have behavioral, emotional and speech disorders in their first five years of the professional life due to several conditions, such as their personality, emotions, and working conditions.