Table 3.

Questionnaire items and results

Items		Results
	Cohorts:	(+ RF, − TC)		(− RF, + TC]		(+ RF, + TC)		(− RF, TC)
1. The instructions of Soliloquizing were easy and clear to follow		M	4	M	4.57	M	4.28	M	4.28
		SD	0.57	Sd	0.53	Sd	0.75	Sd	1.11
2. During the 4-week treatment, the soliloquizing technique always kept me interested		M	3.71	M	3.71	M	3.42	M	3.85
		SD	0.75	Sd	0.95	Sd	0.78	Sd	0.89
3. Soliloquizing is suitable for college students to practice their speaking skills individually		M	4.28	M	4.71	M	4.28	M	4.71
		SD	0.48	Sd	0.48	Sd	0.48	Sd	0.48
4. Compared to simply speaking in a speaker’s position, asking yourself questions in an interviewer’s position in time allowed you to produce language more fluently		M	3.71	M	4	M	4	M	4.37
		SD	0.48	Sd	0.81	Sd	1.15	Sd	0.75
5. Compared to practicing speaking with others, you prefer to practice the soliloquizing technique alone		M	3.57	M	4	M	3.28	M	3
		SD	1.13	Sd	0.81	Sd	1.38	Sd	1.52
6. By reviewing (other people’s practice) videos posted on the Facebook group, you were able to reflect on your own practices and improve		M	4.42	M	4.14	M	4	M	4
		SD	0.78	Sd	0.89	Sd	1.41	Sd	0.57
7. The daily training materials were easy to refer to in terms of background knowledge		M	4	M	4.28	M	3.57	M	4.28
		SD	0.81	Sd	0.75	Sd	0.97	Sd	0.95
8. The daily training materials were appropriate for your English proficiency, as they were neither too hard nor too easy		M	4.28	M	4.28	M	4.42	M	4.42
		SD	0.75	Sd	0.95	Sd	0.53	Sd	0.53
9. It was easier to produce speech utilizing extralinguistic features like gestures, facial expressions, and body language		M	4.71	M	4.85	M	4.14	M	4.14
		SD	0.75	Sd	0.37	Sd	0.69	Sd	0.89
10. You would recommend this technique to a friend		M	4.85	M	4.42	M	4.42	M	4.57
		SD	0.75	Sd	0.53	Sd	0.53	Sd	0.78