Background Symptom-based diagnostic formulations significantly influence psychological treatment; however, they are not without limitations. Employing a transdiagnostic approach may address these shortcomings. For transdiagnosis to gain wider acceptance, it is crucial to establish a meaningful connection between transdiagnostic measures and symptom expression. Two potential transdiagnostic measures, the Event Characteristics Questionnaire (ECQ) and the Basic Psychological Needs Satisfaction and Needs Frustration Scale (BPNSNFS), were identified based on theories of psychopathology. The present study investigated whether the unique within-person characteristics assessed by each scale could indicate symptom expression over time. Method Online questionnaires were completed by 290 international participants (86% female) who had experienced a significant event within the past 12 months. The measures included the ECQ, BPNSNFS, and clinical assessments of depression, anxiety, and anger. Results Results indicated that only the BPNSNFS demonstrated a meaningful connection with symptom expression. A cross-lagged structural analysis revealed that participants experiencing higher levels of needs frustration reported higher levels of depression and anger. Conversely, those reporting higher levels of needs satisfaction reported lower levels of depression and anxiety. Conclusions The findings suggest that the BPNSNFS can serve as a valuable transdiagnostic tool to enhance the delivery of measure-based care. Further research should continue to explore the clinical role of basic psychological needs.

The novel coronavirus SARS-CoV-2 (COVID-19) has accentuated the role and interplay of numerous educational factors, inviting pedagogical research concerning online education. Using self-determination theory’s basic psychological needs and fundamental learning theories, identified educational factors were integrated into three pathways: (1) autonomy, technology acceptance, and self-regulation of learning; (2) relatedness, authentic happiness, and a classroom community; and (3) competency, harmonious passion, and trait conscientiousness. This study extends educational research by elucidating the relationships between psychological need fulfilment, educational factors, and students’ expectations of their future grades during the impact of COVID-19. Australian university students ( N = 226, 77% female) completed questionnaires assessing their experience of home isolation, factors of each hypothesised pathway, and their expected grades. Structural equation modelling revealed that higher need fulfilment significantly predicted engagement in educational factors and that educational factors are complexly interrelated, providing resilience, motivation, and the mechanisms that facilitate learning. Most importantly, relatedness between academics and students positively influenced all learning pathways. Reciprocal determinism demonstrated the most substantial association with expected grades, and new insight was gained into the interrelationships of passion, trait conscientiousness, and self-regulation of learning.