The research team, led by Beyza Nur Turgut and Eyüp Çelik of Sakarya University's Department of Guidance and Psychological Counseling, set out to address a gap in the literature. Although self-compassion is widely recognized as a protective factor against depression, the psychological mechanisms that explain this association have remained insufficiently understood. Previous studies had linked the individual pieces—self-compassion, cognitive flexibility, self-acceptance, and depression—to one another in various combinations, but limited evidence had examined all of them simultaneously within a single statistical model.

Testing them together, the researchers argued, could clarify which pathways actually carry the association. Depression itself remains a substantial global burden. According to figures cited in the study from the World Health Organization, more than 300 million people worldwide are affected, roughly 4 to 5 percent of the global population.

The disorder is characterized by persistent sadness, loss of interest or pleasure, cognitive impairments, and functional difficulties, and it occurs more frequently in middle age, particularly between 25 and 50. Lifetime prevalence is reported at about 30 percent in women and 17 percent in men, with women roughly twice as likely as men to experience depression. Known risk factors include medical illness, loneliness, bereavement, low socioeconomic status, unemployment, childhood trauma, workplace difficulties, family problems, and substance use.

Self-compassion, as conceptualized by researcher Kristin Neff and colleagues, involves recognizing human imperfection and responding to oneself with understanding rather than harsh self-criticism. It comprises three interrelated components: self-kindness, common humanity, and mindfulness. Rather than suppressing, denying, or over-identifying with painful thoughts and emotions, self-compassion promotes a balanced, non-judgmental awareness of distressing experiences.

Earlier research has tied this stance to psychological wellbeing, emotional intelligence, resilience, and mindfulness, while showing consistent negative associations with depression and anxiety. The theoretical logic is straightforward: people who do not attack themselves when they fail may be less vulnerable to the spirals of rumination and self-blame that feed depressive symptoms. The study recruited 318 adults aged 18 to 65, with a mean age of 31.16 years, using convenience and snowball sampling through online channels including email, WhatsApp, Facebook, and Instagram.

Three participants under 18 were excluded, leaving the final dataset. The sample was predominantly female—242 women, or 76.1 percent, versus 76 men—and highly educated, with 71.4 percent holding undergraduate degrees and another 13.8 percent holding postgraduate qualifications. Just over half the participants were single.

Participation was voluntary and anonymous, informed consent was obtained before the questionnaire, and the study received ethics approval from Sakarya University's Education Research and Publication Ethics Committee in April 2025. Participants completed four validated instruments: the Depression Anxiety Stress Scale-21, whose depression subscale was used in raw form with scores from 0 to 21; the Turkish adaptation of Neff's Self-Compassion Scale, a 24-item single-factor measure; the Unconditional Self-Acceptance Scale, a 19-item Turkish adaptation; and the 12-item Cognitive Flexibility Scale adapted by Altunkol. All scales showed acceptable internal consistency in the sample, with Cronbach's alpha values ranging from 0.76 to 0.89.

A post hoc sensitivity power analysis indicated the sample was sufficient to detect small effect sizes in the mediation model, with a minimum detectable effect size of approximately f² = 0.03 to 0.04. The statistical picture was clear at the level of simple associations. Depression was also negatively correlated with unconditional self-acceptance (r = −0.45) and cognitive flexibility (r = −0.41), while self-compassion correlated positively with both potential mediators.

In a simple regression, self-compassion significantly predicted depression (β = −0.18, 95% CI: −0.20 to −0.14, p < 0.001), accounting for roughly 32 percent of the variance in depressive scores. The mediation analysis, conducted with the PROCESS macro (Model 4) in SPSS, tested whether unconditional self-acceptance and cognitive flexibility operated as parallel pathways between self-compassion and depression. Cognitive flexibility emerged as the significant mediator: the indirect effect of self-compassion on depression through cognitive flexibility was statistically significant, with a confidence interval excluding zero.

Unconditional self-acceptance, by contrast, showed only a weaker indirect effect, with its direct path to depression reaching only marginal significance (p = 0.05). A third pathway, running from self-compassion through self-acceptance and then through cognitive flexibility to depression, was also small but significant. Importantly, self-compassion retained a significant direct effect on depression even after both mediators were included, indicating partial rather than full mediation—the total effect of −0.18 dropped to −0.13 when the mediators were accounted for.

Why would cognitive flexibility carry more of the association than self-acceptance? The authors draw on theory suggesting that flexible thinkers can reinterpret distressing experiences, generate alternative responses to challenging situations, and forgive themselves for mistakes—capacities that dovetail naturally with self-compassion. Within Beck's cognitive model of depression, flexible thinking helps individuals transform negative automatic thoughts into more constructive ones, and prior work has shown that cognitively inflexible people, who fixate on rigid interpretations, are more prone to depressive symptoms.

Unconditional self-acceptance—valuing oneself without needing success, approval, or external appreciation—remains theoretically important, and the authors note it may support self-compassion by anchoring self-worth in existence rather than performance. But in this dataset its independent mediating contribution was modest. The authors are careful about what the study cannot show.

Because the design is cross-sectional, no causal conclusions can be drawn; the variables cannot be interpreted within a causal framework, and it is equally possible that lower depressive symptoms foster self-compassion and flexible thinking rather than the reverse. The online recruitment and snowball sampling limit representativeness, excluding people without access to online platforms, and self-report data may be inflated by socially desirable responding. The heavily female and highly educated sample further constrains generalizability, particularly given documented gender differences in depression prevalence, and the wide age range of 18 to 65 may have introduced age-related variation in both depressive experiences and the psychological processes under study.

The authors call for longitudinal and experimental designs, samples across different cultures and age groups, controls for covariates such as age, gender, and education, and examination of self-compassion's subdimensions. They also suggest that psychoeducation programs targeting self-compassion, unconditional self-acceptance, and cognitive flexibility could be developed as preventive or supportive approaches for people at risk of depression—an application that, on the present evidence, remains a hypothesis to be tested rather than a validated intervention.

Subject of Research: The mediating roles of cognitive flexibility and unconditional self-acceptance in the association between self-compassion and depressive symptoms in Turkish adults

Article Title: In light of cognitive flexibility and unconditional self-acceptance: the association between self-compassion and depression

Article References: Turgut, B. N., & Çelik, E. (2026). In light of cognitive flexibility and unconditional self-acceptance: the association between self-compassion and depression. Frontiers in Psychology, 17, Article 1750895. https://doi.org/10.3389/fpsyg.2026.1750895

Image Credits: AI Generated

DOI: 10.3389/fpsyg.2026.1750895

Keywords: self-compassion, depression, cognitive flexibility, unconditional self-acceptance, mediation analysis, cross-sectional study, Turkish adults, positive psychology, DASS-21, psychopathology, mental health, rumination