Final answer:
A good research topic in psychology would be to investigate the relationship between increased social media usage and self-esteem in adolescents.
Step-by-step explanation:
Good idea for a research topic in psychology would be to investigate the relationship between increased social media usage and self-esteem in adolescents. This topic can be studied using surveys to collect primary data from the respondents. The independent variable in this research would be increased social media usage, while the dependent variable would be self-esteem. By conducting surveys and analyzing the data, researchers can examine whether increased social media usage has an impact on improving self-esteem in adolescents.