Individuals with adverse childhood experiences (e.g.childhood abuse or neglect) will be included as the experimental group of participants. Individuals will fill out the designated questionnaires (e.g. Childhood Trauma Questionnaire, Rejection Sensitivity Questionnaire, Loneliness questionnaires), will participate in a multimodal emotion recognition experiment as well as a virtual reality (VR) task.

Individuals with no trauma history will be added as the healthy control group of participants. Individuals will fill out the designated questionnaires (e.g. Childhood Trauma Questionnaire, Rejection Sensitivity Questionnaire, Loneliness questionnaires), will participate in a multimodal emotion recognition experiment as well as a virtual reality (VR) task.

Individuals with Borderline Personality Disorder (BPD) will be added as a clinical control group. Individuals will fill out the designated questionnaires (e.g. Childhood Trauma Questionnaire, Rejection Sensitivity Questionnaire, Loneliness questionnaires), will participate in a multimodal emotion recognition experiment as well as a virtual reality (VR) task.

The intervention will include the implication of related questionnaires, followed by a lab experiment for social belonging with multiple modalities. Participants will be shown pictures of different faces and asked to judge their feelings towards them. Further, a VR task will include finding the way through a virtual maze with the help of two virtual characters.

A 20-item scale designed to measure one's subjective feelings of loneliness as well as feelings of social isolation. Participants rate each item on a scale from 1 (Never) to 4 (Often). Ratings are summed up by taking the reversed items into consideration.

Rejection Sensitivity Questionnaire will be used to measure the cognitive and affective components of the rejection experience, namely rejection expectancy and rejection concern. RSQ involves nine hypothetical interpersonal situations to measure how respondents would feel or think in stated situations. Items are answered on a 6-point Likert scale from 1= "very unconcerned" to 6= "very concerned" for the rejection concern and 1= "very unlikely" to 6= "very likely" for the rejection expectancy. By multiplying the results of the two levels, total rejection sensitivity score is calculated and higher scores indicate higher sensitivity to rejection.

JSI includes for questionnaire scales assessing victim, observer, beneficiary and perpetrator sensitivity on four subscales. Scores for each subscale range from 0 to 50 based on 10 items (6-point rating scale ranging from 0 to 5). Higher scores indicate a higher sensitivity to justice. JSI involves 4 each have 2 dimensions in terms of the applicability of the question for the self and the others.