Implicitly biased teaching practices or the unconscious discriminatory actions of teachers create the learning-threatening illusion of being biased in the minds of learners. This study identified the main manifestations of implicitly biased teaching practices in online EFL learning, and then, delved deeper into the factors shaping their manifestations. Participants of the study were 45 intermediate-level EFL learners attending an online course in an Iranian public educational institute. Each participant was required to report on the biased teaching practices manifested during the three-month course. In the end, focused interviews were conducted to identify the contributing factors to their perceptions. Results of the study came up through content analysis indicated that intermediate-level learners perceive implicitly biased teaching practices as micro-assault (underrating) or micro-insult (demeaning) behavior each of which could result in a different reaction and participation pattern among themselves. This study concludes that false expectations, negative comparisons, and the online nature of communication are the main factors determining what learners regarded as biased teaching practices. Moreover, this study rejects the efficacy of micro-invalidation in preventing implicit bias in online learning. This study encourages EFL teachers to address their implicit bias through considering the participation and development patterns of their learners.
