A driver has to be very attentive while driving. He/she has to always stay calm. But during driving there can be various stressful instances which can affect the cognitive behavior of the driver and can lead to fatal accidents. In the coming age of autonomous driving the vehicles can assist the driver during these stressful conditions which can improve the driving experience. For this we need to find these stressful scenarios and analyse the cognitive behavior of the driver in these scenarios. Cognitive behavior of an individual can be analysed with the help of EEG or skin conductance signals. We analyse various parameters of EEG and skin conductance signal to states like stress, attention, drowsiness etc.