What is the primary reason that temperament tends to remain stable throughout a person's life?

Temperament refers to the innate traits and behavioral styles that individuals exhibit from an early age, influencing their emotional reactions, activity levels, and sociability. The primary reason temperament tends to remain stable throughout a person's life is rooted in genetic factors. Research in psychological and developmental science suggests that temperament has a significant biological basis, meaning that an individual's genetic makeup is a strong determinant of their temperamental characteristics.

From infancy, children demonstrate distinct temperamental patterns, such as being more easy-going, difficult, or slow to warm up. These temperamental traits are largely consistent as they grow, evidencing the role of genetics in shaping enduring personality attributes. While environmental and social experiences can influence and modify behavioral expressions and responses, the core aspects of temperament derive from genetic predispositions, making them relatively stable over time.