The data from the first sample of participants (i.e., the Prolific daily diary study) have not been presented previously. Data from select measures from the other two samples (i.e., data from Prolific participants from two assessments approximately 2 weeks apart; cross-sectional data from undergraduates) have been published in one previous manuscript (see for more information: https://osf.io/bcavr/). However, all analyses presented are original and the scope of the current manuscript is distinct from any prior research. Data presented in the manuscript and data analytic syntax are available on the Open Science Framework website: https://osf.io/x37ej/

Background Individuals with Social Anxiety Disorder (SAD) may be at a higher risk for negative outcomes during the COVID-19 pandemic due to isolation that is both characteristic of the disorder and also potentially exacerbated by quarantine and public health restrictions. Accordingly, we evaluated emotional and behavioral responses to stress during COVID-19 and attitudes towards COVID-19 vaccine adoption in socially anxious versus non-socially anxious adults. Methods Participants (N = 84) were young adults between 18 and 24 years of age who completed a diagnostic interview and self-report measures assessing stress, anxiety and coping responses during COVID-19. Welch’s t -tests assessed group differences on mental health outcomes between the SAD versus non-SAD group, and Pearson’s χ2 test evaluated COVID-19 vaccination status by group. Lastly, logistic regression examined whether SAD predicted positive COVID-19 vaccination attitude. Results Results indicated the SAD group demonstrated significantly elevated rates of anxiety and depression as compared to individuals without SAD and had significantly increased rates of engagement in safety behaviors as well as maladaptive coping mechanisms in response to COVID-19 stress. Individuals with SAD were significantly more likely to receive or plan to receive the COVID-19 vaccine. Conclusions The current study provides evidence that social anxiety may be a significant factor associated with the impact of COVID-19 as well as attitudes with vaccine compliance. Supplementary information The online version contains supplementary material available at 10.1007/s10608-022-10310-3.

We examined hierarchical structural models of psychopathology in samples of (a) adults recruited online and screened based on psychopathology history ( N = 429) and (b) undergraduates ( N = 529) to inform classification of neurodevelopmental disorder (NDD)- and hypomania-relevant dimensions within the Hierarchical Taxonomy of Psychopathology (HiTOP). Results differed across samples in some ways, but converged to indicate that some NDD- and hypomania-relevant dimensions aligned closely with different HiTOP spectra. For example, some hypomania-relevant dimensions (e.g., affective lability) overlapped strongly with the internalizing spectrum, whereas others (e.g., self-perceived charisma) were reverse-indicators of detachment. Examination of cross-sectional and prospective correlates for emergent factors also was informative in some ways. This included NDD-relevant and disinhibited externalizing dimensions associating robustly with treatment seeking history and recent experiences of distress. These results provide initial insights into classifying NDD- and hypomania-relevant dimensions within the HiTOP and indicate a need for future research in this area.

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