Need for cognition - NFC - is a recognized indicator of deep or shallow thinking.
People who like to challenge their minds have high NFC. Those who avoid deep thinking have low NFC.
High NFC individuals possess an intrinsic motivation to think, having a natural motivation to seek knowledge. Those with low NFC don't like to grapple with complexity and tend to content themselves with superficial assessments, particularly when faced with difficult intellectual challenges.
Source: Rough Type (edited)