Ordinary extraordinary: Elusive group differences in personality and psychological difficulties between STEM-gifted adolescents and their peers.

Background: Individual differences in personality, behavioural, and academic outcomes of gifted adolescents remain under-explored.

Aims: The present study directly compared selected and unselected adolescents on multiple measures of personality, behavioural strengths and difficulties, and achievement.

Sample: Nine hundred seventy-three adolescents selected for high performance in Science, Technology, Engineering, and Mathematical (STEM) fields (M = 15.