This process often leads to the participant engaging in visualization and generating mental imagery that may simulate or re-create the sensory perception[7] of sights,[8][9] sounds,[10] tastes,[11] smells,[12] movements,[13] and images associated with touch, such as texture, temperature, and pressure,[14] as well as imagined mental content that the participant experiences as defying conventional sensory categories.[15] The generating of such mental imagery can precipitate or accompany strong emotions or feelings.[16][17][18]