Stress Classification Using Brain Signals Based on LSTM Network

Table 7

Comparison of stress classification accuracies.

Reference	Number of subjects	Number of electrodes	Levels of stress	Stimulus	Classification method	Accuracy (%)
[31]	18	32	2	Emotional video clips	Mean asymmetry scores	—
[37]	9	14	2 and 4	SCWT	SVM	85.17 (2 classes)
						67.06 (4 classes)
[61]	12	3	3	SCWT	SVM	72.3
[35]	7	14	3	Multitasking, SCWT	SVM	77.53
				Arithmetic calculations and memory
[62]	28	4	2 and 3	Public speaking	MLP	92.85 (2 classes)
						64.28 (3 classes)
[63]	10	1	2	SCWT	SVM	97.6
[21]	9	14	2	High and low altitude	FC-DNN	86.62
				Construction site
Proposed	35	4	2	Emotional video clips	LSTM 2^1	87.22
Proposed	35	4	2	Emotional video clips	LSTM 2^2	89.28
Proposed	35	4	2	Emotional video clips	LSTM 2^3	90.33
Proposed	35	4	2	Emotional video clips	LSTM 2^4	93.17

¹Result for 50–50 training-testing data, ²result for 60–40 training-testing data, ³result for 70–30 training-testing data, and ⁴result for 10-fold cross validation.