Before revision: Alderfer also proposed a progression and regression theory to go along with the ERG theory: he said that when needs in a lower category are satisfied, individuals invest more efforts in the higher category, and when needs in a higher category are frustrated, individuals invest more efforts in the lower category.
After revision: Alderfer also proposed a progression and regression theory to go along with the ERG theory: he said that when needs in a lower category are satisfied, an individual will invest more efforts in the higher category, and when needs in a higher category are frustrated, an individual will invest more efforts in the lower category.