Final answer:
To assist unpopular adolescents in improving social skills, interventions primarily utilize social skills training, which teaches positive interaction methods and enhances communication abilities.
Step-by-step explanation:
Interventions designed to help unpopular adolescents improve their social skills typically employ social skills training as a technique. This intervention focuses on teaching the individuals positive ways to interact with others, enhance their communication abilities, and develop friendships. Social skills training can include role-playing, social games, and direct teaching of social conventions. This technique is favored over negative approaches such as isolation or punishment, and non-reactive strategies like ignoring the issue, which are not effective in fostering social competence.