Final answer:
Cognitive complexity is the term that enables a person to perceive multiple attributes in others, allowing for a nuanced understanding of their characteristics.
Step-by-step explanation:
The term that allows a person to perceive multiple characteristics of another person rather than attending to just a few traits is Cognitive complexity. Cognitive complexity refers to a person's cognitive form, which is the mental action or process of acquiring knowledge and understanding through thought, experience, and the senses. Those with high cognitive complexity have a more nuanced perception of reality because they recognize a variety of attributes in others. This contrasts with a simpler cognitive style that tends to perceive a situation or person in more black and white terms.