“…These factors include proficiency level, anxiety, social context, confidence, affective dimensions, cognitive conditions, motivation and attitudes, gender, age and so forth (Cao & Philp, 2006;Pawlak & Mystkowska-Wiertelak, 2015). These studies project WTC not as a static but as a dynamic construct since the same person's WTC may vary and fluctuate under different conditions; this has been carefully documented and explored in other research underpinned by an ecological perspective on WTC (e.g., MacIntyre & Legatto, 2011;Mystkowska-Wiertelak & Pawlak, 2014;MacIntyre, Burns, & Jessome, 2011;Yu, 2015).…”