Physiological Response to Self-compassion Versus Relaxation

Inclusion Criteria: * Being ≥18 years old * A clinical level of depression or anxiety (defined as ≥ 8 on the ODSIS14 or OASIS15) * High self-criticism or low self-reassurance, as measured by the FSCRS16 (≥24 on self-inadequacy, ≥ 8 on self-hatred, or ≤18 on self-reassurance). These cut-offs correspond to 0.5 SD above the mean in self-inadequacy/self-hatred, and 0.5 SD below the mean on self-reassurance, based on a validation of the FSCRS17 in Colombia28. Exclusion Criteria (Note: these were added subsequent to seeking ethical approval but before study commencement): * Positive screen on the Mood Disorder Questionnaire (MDQ), following the norms published by the authors * Positive screen on the Standardised Assessment of Personality - Abbreviated Scale (SAPAS), defined as scoring 4+ * Severity of Dependence Scale (SDS): scoring 3+ for alcohol use or 5+ for other substances. * Significant suicidal ideation. Participants were asked, "On a scale of 1 to 7, what is your intent to end your life right now?" from 1 (low) to 7 (high), and "Are you uncertain about being able to control suicidal impulses?" (Yes/No). Participants were excluded for responding ≥5 on item 1 or "yes" to item 2