List of Articles Kobra Fallah Article 1 - A Comparative Study of the Effects of Equal and Expanding Spacing Schedules on L2 Receptive and Productive Vocabulary Retrieval 10.30486/relp.2021.1943193.1312 Roya Khoii Kobra Fallah Abed Research in English Language Pedagogy , Issue 4 , Year , Summer 2022