Before revision:  This value captures the degree of complexity /  decision difficulty at the relevant menuand allows for the choice probability of the outside option to either increase or decrease when the menu is expanded, depending on *how many* as well as *how attractive* options are added to it.
After revision:  The relative value of this utility determines the probability of avoiding / decision difficulty at the relevant menuand allows for the choice probability of the outside option to either increase or decrease when the menu is expanded, depending on *how many* as well as *how attractive* options are added to it.