Psychology MCAT Practice Exam

The term "distal stimuli" refers to objects and events that exist in the external environment, which are the sources of sensory inputs. These stimuli are the actual physical entities that our senses detect, such as a tree, a car, or a sound in the distance. Distal stimuli are crucial because they initiate sensory processing, where they are perceived and interpreted by our brains through various senses.

In contrast, proximal stimuli relate to the immediate sensation that occurs when these distal stimuli interact with our sensory organs. For example, the image of the tree that is formed on the retina when light reflects off it is a proximal stimulus. Receptive stimuli is not a standard term used in this context. Internal stimuli pertain to sensations that arise from within the body, such as hunger or pain, rather than external environmental cues. Thus, understanding the distinction between these concepts highlights why "distal stimuli" is the correct answer for identifying external environmental influences.