AUTHOR=Luo Xuan , Huang Youlian TITLE=RETRACTED: Mental Health Identification of Children and Young Adults in a Pandemic Using Machine Learning Classifiers JOURNAL=Frontiers in Psychology VOLUME=Volume 13 - 2022 YEAR=2022 URL=https://www.frontiersin.org/journals/psychology/articles/10.3389/fpsyg.2022.947856 DOI=10.3389/fpsyg.2022.947856 ISSN=1664-1078 ABSTRACT=COVID-19 has altered every lifestyle, communication, employment, and also our emotion. The pandemic and its devastating implications had a significant impact on higher education, as well as other sectors. Numerous researchers have utilized typical statistical methods to determine the effect of COVID-19 on the psychological well-being of young people. Moreover, to describe the primary aspects that alter in the psychological condition of children and young adults during COVID lockdown is analyzed. This mental state of people is analyzed using machine learning and AI techniques which should be established for the alterations. This research work mainly concentrates on children’s and young people’s mental health in the first lockdown. There are six processes involved in this work. Initially, it collects the data by using questionnaires, and then the collected data is pre-processed by data cleaning, categorical encoding, and data normalization method. Next, the clustering process is used for grouping the data based on their mood state, and then the feature selection process is done by Chi-square, L1-Norm, and ReliefF. Then the machine learning classifiers are used for predicting the mood state and then the automatic calibration is used for selecting the best model. Finally, it predicts the mood state of the children and young adults. The findings revealed that to have a better understanding of the effects of the COVID-19 pandemic on children’s and youths' mental states. A combination of heterogeneous data from practically all feature groups is required.