This repeated exposure makes humans numb to the possibility that an event of that nature can occur. However, when asked to recall the probability that mass extinction will occur, people have a tendency to think counter-intuitively and rate the probability as high when it is in fact low and behaviorally respond opposite to his or her rating. Additionally, much of the individualist view comes from studying the behavioral traits of people who suffer from PTSD. Focus groups, clinical cases, as well as religion play a crucial role in one's ability to cope with the stress of traumatic stimuli. Many studies have been conducted that address the value of these therapeutic interventions as well as their efficacy. There is a strong connection to depersonalization, emotional numbing, as well as dissociation from one's identity. This shows the shift of psychic numbing from a collectivist view to an individualistic view. Collectivist Robert Jay Lifton spearheaded the psychic numbing movement and his concentration was on a much larger scale. Psychic numbing is about the way a culture or society withdraws from issues that would otherwise be too overwhelming for the human mind to comprehend. In this respect, psychic numbing is a societal reaction to impending doom, chaos, and ultimately mankind's extinction. Paul Slovic, a prominent psychologist in the realm of risk, maintains the original interpretation posited by Lifton. Slovic's article, "Psychic Numbing and Mass Atrocity", returns to the collectivist model and most notably confronts the value of saving a human's life. The figures to the right denote both arguments for the hypothesized value of saving a human's life as well as the true value of saving a human's life established through Slovic's empirical research. Slovic introduced the concept of psychophysical numbing, which is the diminished sensitivity to the value of life and an inability to appreciate loss. Essentially, the proportion of lives saved is more important than the number of lives saved. One of Slovic's arguments for this outcome is that people suffer from innumeracy and cannot comprehend the emotional connotation associated with large numbers. The threshold, as stated by Slovic, where people cannot comprehend the emotional magnitude of the loss of life is two, as shown in the figure. Paul and researchers say findings can be summarized with "The more who die, the less we care." Slovic also points to Weber's law, which states the difference between two stimuli is proportional to the