Table 2.

Quality Assessment (QA) questions.

#QA	Quality Questions	Yes	Partially	No
QA1	Are the objectives of the study clearly identified?	32	45	8
QA2	Are the limitations of the study clearly specified?	15	19	51
QA3	Are the detected emotions clearly specified?	48	24	13
QA4	Are the technologies used clearly specified?	23	54	8
QA5	Are the emotion detection targets clearly specified?	10	4	71
QA6	Are the used dataset clearly specified?	76	4	5
QA7	Are the findings and results stated and discussed?	64	16	5
QA8	Is the research methodology reproducible?	14	22	49
QA9	Has a comparative analysis been performed?	45	23	17