TEST-PREP: Students who did test-preparation only
(Marked YES for any of items 11-13, but NO for all items 14-23)
GENERAL: Students who followed a general type of English learning, not test-preparation, to gain a command of English.
(Marked NO for all items 11-13, but YES for any of items 14-23)
MIXED: Students who did both test-preparation and general English learning (Marked YES for any of items 11-13, and YES for any of items 14-23)