“…The researcher of this work observed that from previous literatures, some researchers used written sentences to explain their conceptual frameworks (Nwokwu, Rathnasinghe, and Pradeep, 2019), while on the other hand, some researchers used diagram to represent their conceptual frameworks (Nwokwu, Atapattu, and Azeez, 2019;Nwokwu, Dharmadasa, and Rathnasinghe, 2018;Nwokwu, 2018).…”