I believe the answer is: Naturalistic theory
Naturalistic theory refers to the theory which see that everything that happen in universe could always be explained by logical approach. In research, having this theory would make researchers reluctant to make conclusion without objective evidence.
Starting from down to top,Self actualizationEsteemLove/belongingSafetyPhysiological
<span>At Cornell university, Gibson and walk placed infants on the edge of a safe canyon to determine whether crawling infants and newborn animals can perceive depth. this famous experiment is known as the visual cliff. The </span>psychologists Eleanor J. Gibson and Richard D created apparatus <span>to investigate depth perception.</span>
