Table 1. Comprehensive summary of research works discussed in the related work.

Reference	Approach	Model	Aim
Singh et al. (2013a)	Lexicon-Based	SentiWordNet	Movie review classification
Singh et al. (2013b)	Machine Learning	RLPI, Hybrid Features, KNN	IMDb reviews classification
Yenter & Verma (2017)	Deep Learning	CNN LSTM	IMDb reviews classification
Giatsoglou et al. (2017)	Machine Learning	BoW-DOUBLE and Average emotion-DOUBLE	IMDb reviews classification
Mathapati et al. (2018)	Deep Learning	CNN	IMDb reviews classification
Ali, Abd El Hamid & Youssif, 2019	Deep Learning	Multilayer perceptron, CNN and LSTM	IMDb reviews classification
Minaee, Azimi & Abdolrashidi, 2019	Deep Learning	Bi-LSTM	IMDb review and Stanford sentiment treebank v2 (SST2)
Qaisar (2020)	Deep Learning	LSTM	IMDb reviews classification
Shaukat et al. (2020)	Deep & Machine Learning	NN	IMDb reviews classification
Jain & Jain (2021a)	Deep Learning	CNN	IMDb reviews classification
Nafis & Awang (2021)	Machine Learning	SVM + (SVM-RFE)	IMDb reviews classification
Jain & Jain (2021b)	Machine Learning	NB + ARM	IMDb reviews classification