The Spectrum of Thinking Interventions provides a structure for understanding the different types of decision-making processes by illustrating how our minds would respond in a default, lowest energy way, if we didn't consciously do something different. This spectrum ranges from situations requiring minimal thought to those demanding intensive thinking, and includes the mechanisms ("interventions") that our minds will likely use.
With this spectrum in mind, it is essential as a UX designer to leverage on the mind's decision-making process, analyze which mechanisms are most applicable to your target users and design the most accessible and effective solutions.