**7. Future scopes**

Hybrid BCI has wider future scope and combining three or more signals may result better performances. Optimum combination of signals with high degree of compatibility may be obtained which is accessible to all [98]. Virtual environment-controlled applications [72] may turn to a real one which may provide easy access to target as well as healthy users. These applications may be broadened to people without disabilities too. Various researches are going on to calculate mental workload of armed soldiers, and brain automation control of wheelchair may be extended to control automobiles and airplanes [99]. Efficient algorithms need to be developed in future to make BCI practical with high accuracy and speed which act as a neurorehabilitation for stroke patients suffering from movement and language deficits. Human's intentions, emotions, and behaviors might be predicted in future using EEG which will ease for identifying fatigue in soldiers during war. It might be used in children to study various psychological measures such as behavior and learning tendency relative to age, and can be extended to animals besides human [97]. The laboratory experiment may be extended to the real world to ease our daily lives. Eventually, these might attract stakeholders to invest in BCI industry to produce commercialized BCI products in future.
