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Psychology International

Psychology International - formerly Psych - is an international, peer-reviewed, open access journal on psychology, published quarterly online by MDPI.

All Articles (448)

Classic psychedelics such as lysergic acid diethylamide (LSD) and psilocybin induce mild cardiovascular activation in addition to their psychological effects. While these effects are well described in healthy adults, little is known about their dynamics in clinical populations undergoing psychedelic-assisted psychotherapy. This retrospective, observational, single-center study analyzed routinely collected data from 30 patients (mean age = 51.56 ± 12.19 years; 15/30 female) treated under compassionate use for treatment-resistant depression or anxiety disorders. Participants received either LSD (100–200 mcg) or psilocybin (15–30 mg) in supervised outpatient sessions. Heart rate and self-rated anxiety (VAS 0–100) were recorded at seven intervals from 30 to 300 min post-administration. Linear mixed models examined heart rate trajectories over time × substance, controlling for age and, in a second model, perceived anxiety. Linear mixed models revealed no significant main effect of time (F(6, 77.25) = 0.76, p = 0.60) or substance (F(1, 30.82) = 0.66, p = 0.42), but a significant time × substance interaction (F(6, 77.25) = 3.03, p = 0.01). LSD was associated with a delayed but sustained increase in heart rate peaking at 3–4 h, whereas psilocybin showed an earlier decline. These patterns persisted after adjustment for age and anxiety, and anxiety did not significantly modify the relationship between time and substance. No serious cardiovascular adverse events occurred. These preliminary findings suggest that LSD and psilocybin may produce distinct temporal patterns of cardiovascular activation in clinical settings. However, interpretation should be cautious due to the retrospective design, small sample size, and dose imbalance between substances.

19 December 2025

Estimated marginal means for heart rate across time points, adjusted for age and anxiety. Error bars represent the standard error of the mean.

Numerous studies have examined the effects of the COVID-19 pandemic on university students’ attitudes. However, little is known about how their career awareness changed and how such changes differed between urban and rural areas. This study analyzed psychological data collected through a questionnaire survey conducted from 9 November 2020, to 19 January 2021, among 516 first- to fourth-year students enrolled in social science faculties in Japan. The analysis compared changes in career awareness by university location. The results indicated that, during the pandemic, urban students placed greater emphasis on self-worth, while rural students placed greater emphasis on working conditions, suggesting a possible widening gap between the two groups. Furthermore, logistic multiple regression and path analyses revealed that, among rural students, greater concern for working conditions was associated with a stronger focus on interpersonal relationships, which in turn enhanced their preference for local employment. In addition, valuing interpersonal relationships was linked to a stronger focus on social recognition, which may foster more intrinsic aspects of career awareness.

18 December 2025

Adolescence is a critical period during which alcohol is the most commonly used substance worldwide, and such use has detrimental effects on neurobiological, psychosocial, and physiological development. Despite substantial international evidence, little is known about the concurrent influence of drinking motives and internalizing symptoms on adolescent alcohol use, particularly in the Croatian context, where adolescent drinking rates remain high. A cross-sectional study using a survey questionnaire was conducted in 2024 in Split-Dalmatia County, Croatia. The final stratified cluster sample comprised 925 students (58.8% of the planned sample), with a mean age of 15.41 years. Using hierarchical regression analysis, the results showed that the final model, which included both drinking motives and mental health indicators, explained 39.6% of the variance in alcohol use, 37.2% of the variance in binge drinking, and 31.8% of the variance in alcohol intoxication. Male sex was consistently associated with all three outcomes, whereas age was positively associated with alcohol use and binge drinking. Drinking motives contributed the largest proportion of the explained variance. Furthermore, lower levels of loneliness and higher levels of anxiety were associated with more frequent alcohol use, while lower stress and higher anxiety were associated with more frequent intoxication. Drinking motives are stronger predictors of adolescent alcohol use and risky drinking patterns than internalizing symptoms whose predictive strength was generally small. Prevention programs should address aspects of drinking motives in addition to promoting mental health.

18 December 2025

Background/Objectives: In this study, we aimed to examine the changes in players’ interest/enjoyment, perceived competence, and value/usefulness through an 11-week soccer training program, using a randomized experimental study. Methods: Overall, 175 children aged 9–12 years applied to join the soccer training program at a free soccer school. Of the 175 applicants, 100 were randomly chosen to participate in the soccer training program in the intervention group (IG), whereas the other 75 children were in the control group (CG). Both groups completed a questionnaire with validated items related to interest/enjoyment, perceived competence, and value/usefulness before (pre-test) and after (post-test) the soccer training program. Results: The main finding was that participation in the 11-session soccer training program did not affect the children’s perceived competence, interest/enjoyment, or value/usefulness in a positive or negative direction compared to the CG. Another main finding was a significant decrease in interest/enjoyment from pre-test to post-test in both the control group and the intervention group. Also, the control group had higher values of perceived competence than the intervention group at both pre-test and post-test. However, the effect sizes are very small in both groups, and the practical relevance is small. Conclusions: This study demonstrated that participation at the 11-session soccer training program did not affect the children’s perceived competence, interest/enjoyment, and value/usefulness in a positive or negative direction compared to the CG. Future studies should include longer intervention periods with more weekly and overall training sessions.

17 December 2025

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Psychol. Int. - ISSN 2813-9844