Note (from the link): "Based on previous research, the Need for Cognition Scale appears to be a valid and reliable measure of individuals’ tendencies to pursue and enjoy the process of thinking"
It has nothing to do with Intro/Extroversion. NFC may have some correlation to Intro/Extroversion, but one cannot draw that conclusion from the NFC study alone.
Note (from the link): "Based on previous research, the Need for Cognition Scale appears to be a valid and reliable measure of individuals’ tendencies to pursue and enjoy the process of thinking"
It has nothing to do with Intro/Extroversion. NFC may have some correlation to Intro/Extroversion, but one cannot draw that conclusion from the NFC study alone.