... References Not consider other factors (21) [25], [26], [30], [31], [32], [38], [43], [44], [45], [46], [47], [48], [49], [50], [51], [52], [53], [54], [55], [56], [57] Convenience sampling (19) [32], [35], [37], [40], [43], [45], [46], [50], [52], [53], [55], [57], [58], [59], [60], [61], [62], [63], [64] Multi levels analysis (17) [25], [37], [44], [45], [46], [48], [49], [51], [55], [56], [59], [62], [65], [66], [67], [68], [69] Limited to one region (16) [30], [32], [33], [37], [38], [46], [47], [48], [49], [54], [56], [58], [59], [63], [68], [70] Tailored to a specific AR product (14) [45], [46], [47], [52], [53], [54], [57], [61], [62], [64], [65], [67], [68], [70] Small Sample Size (10) [30], [32], [33], [38], [40], [47], [50], [54], [60], [71] Short term effect (10) [29], [31], [38], [43], [45], [58], [63], [65], [69], [72] Not specified (9) [34], [41], [50], [73], [74], [75], [76], [77], [78] Only Intention Model (6) [31], [51], [52], [56], [58], [79] Lack of AR features (6) [25], [29], [32], [48], [63], [71] Lack of functions (4) [25], [26], [29], [32] Self-Administered Survey (3) [58], [66], [79] Use Videos for demonstrations (3) [25], [26], [65] Technical challenges (2) [27], [28] Standardized tools (2) [29], [52] Single Analysis technique (2) [33], [48] Lab setting (2) [55], [64] Not consider privacy concerns (2) [25], [60] Others (8) [25], [26], [29], [32], [56], [59], [58], [70] Along with convenience sampling, limited study to one region is another shortcoming that is often mentioned with non-probability method limitation. Unlike convenience sampling drawback that subjects may come from different parts of the world, the regional issue was arising where the study was intentionally designed for a specific region through a case study or in the lab setting [55], [64]. ...