Final answer:
The personality trait with a biological basis in the amygdala as per Colin DeYoung's research is neuroticism, which is associated with the emotional reactivity and processing of the amygdala according to the Big Five model of personality traits.
Step-by-step explanation:
The personality trait that is considered to have a biological basis in the amygdala, according to Colin DeYoung's research, would be neuroticism. This trait is related to an individual’s emotional stability and their tendency toward anxiety and moodiness. In DeYoung's perspective, which is associated with the Big Five personality traits model, the amygdala plays a crucial role in processing emotional responses, and therefore, a higher sensitivity or reactivity of the amygdala could lead to traits associated with neuroticism.
According to the Big Five model, also known as the Five Factor Model, the key personality traits include openness to experience, conscientiousness, extraversion, agreeableness, and neuroticism. These traits are often remembered using the mnemonic OCEAN. Neurotic individuals generally display a higher level of emotional reactivity, which may stem from the biological underpinnings of the amygdala, and this state contrasts with stable individuals who require more stimulation to trigger a similar emotional response.