Alongitudinal study that traced the development of sensation seeking, which can lead to intuitive thinking, from age 12 through age 24 found that increases in sensation seeking were notable from ages

The answer is in the question: 12 to 24. There is an entire 12 year period of development in which people are developing both sensation seeking and intuitive thinking abilities. Sensation seeking is frequently called "excitement seeking" and, at high levels, those affected are called "adrenaline junkies." Tween to young adulthood are peak times for risk taking behaviors in order to experience new things and learn of their consequences.