Flexible scaling and persistence of social vocal communication.

Innate vocal sounds such as laughing, screaming or crying convey one's feelings to others. In many species, including humans, scaling the amplitude and duration of vocalizations is essential for effective social communication1-3. In mice, female scent triggers male mice to emit innate courtship ultrasonic vocalizations (USVs)4,5. However, whether mice flexibly scale their vocalizations and how neural circuits are structured to generate flexibility remain largely unknown. Here we identify mouse neurons from the lateral preoptic area (LPOA) that express oestrogen receptor 1 (LPOAESR1 neurons) and, when activated, elicit the complete repertoire of USV syllables emitted during natural courtship. Neural anatomy and functional data reveal a two-step, di-synaptic circuit motif in which primary long-range inhibitory LPOAESR1 neurons relieve a clamp of local periaqueductal grey (PAG) inhibition, enabling excitatory PAG USV-gating neurons to trigger vocalizations. We find that social context shapes a wide range of USV amplitudes and bout durations. This variability is absent when PAG neurons are stimulated directly; PAG-evoked vocalizations are time-locked to neural activity and stereotypically loud. By contrast, increasing the activity of LPOAESR1 neurons scales the amplitude of vocalizations, and delaying the recovery of the inhibition clamp prolongs USV bouts. Thus, the LPOA disinhibition motif contributes to flexible loudness and the duration and persistence of bouts, which are key aspects of effective vocal social communication.

Emergent Mental Health Visits to a Pediatric Hospital: Impact on Firearm Storage Practices.

OBJECTIVE: The aims of this study were to describe firearm storage practices in homes of patients evaluated for mental health (MH) complaints at a tertiary care children's hospital and to describe storage practice changes after treatment. METHODS: We surveyed families of children with MH complaints presenting to the emergency department or psychiatry unit who stored firearms in their homes between February 12, 2016, and January 14, 2017. Patients and families received standard care, including routine counseling on limiting access to methods of suicide. Participants completed surveys at baseline, 7, and 30 days after discharge. The primary outcome was triple safe firearm storage-storage of firearms unloaded, locked, and with ammunition stored and locked separately. RESULTS: Ninety-one household members of MH patients who stated they had firearms were enrolled at baseline. Seventy-seven (85%) completed at least 1 follow-up survey, and 63 (69%) completed both. At baseline, 21% (19/91) of participants reported engaging in triple safe firearm storage, 26% had an unlocked firearm, 23% had a loaded firearm, and 65% stored ammunition either unlocked or with their firearm. Triple safe storage rates increased to 31% at both 7 days and 30 days. Ten (17%) of 59 (P < 0.01) participants who did not report triple safe storage at baseline and completed a follow-up survey changed to reporting triple safe storage on follow-up. CONCLUSIONS: The majority of firearm-storing family members of children with MH complaints do not follow triple safe storage practices. Storage practices modestly improved after an emergent MH visit, but over two thirds of participants reported unsecured or partially secured firearms 7 and 30 days later.

Group therapy for mood disorders: A meta-analysis.

The addition of group psychotherapy as a specialty by the APA in 2018 creates a need for rigorous empirical reviews of group treatments for specific disorders. We conducted a meta-analysis of randomized controlled trials (RCTs) that tested the effect of group psychotherapy for mood disorders, including depression and bipolar disorder, at posttreatment and follow-up time-points, as well as rates of recovery and attrition. Major databases were searched for RCTs of group treatment for depression and bipolar disorder published from 1990 to 2018, which identified 42 studies across both disorders. Random effects meta-analyses indicated that group therapy for depression produced superior outcomes compared to waitlist control (WLC) and treatment as usual (TAU) and equivalent outcomes to medication. Similarly, group therapy for bipolar disorder produced superior outcomes to TAU. Analyses of recovery rates were conducted for depression, producing similar results to the main outcome analyses. Rates of attrition did not differ between group and comparison conditions for either disorder. These findings support group therapy for treating depression and bipolar disorder, although further research is needed comparing group treatment for bipolar disorder to medication.

A Trypanosomatid Iron Transporter that Regulates Mitochondrial Function Is Required for Leishmania amazonensis Virulence.

Iron, an essential co-factor of respiratory chain proteins, is critical for mitochondrial function and maintenance of its redox balance. We previously reported a role for iron uptake in differentiation of Leishmania amazonensis into virulent amastigotes, by a mechanism that involves reactive oxygen species (ROS) production and is independent of the classical pH and temperature cues. Iron import into mitochondria was proposed to be essential for this process, but evidence supporting this hypothesis was lacking because the Leishmania mitochondrial iron transporter was unknown. Here we describe MIT1, a homolog of the mitochondrial iron importer genes mrs3 (yeast) and mitoferrin-1 (human) that is highly conserved among trypanosomatids. MIT1 expression was essential for the survival of Trypanosoma brucei procyclic but not bloodstream forms, which lack functional respiratory complexes. L. amazonensis LMIT1 null mutants could not be generated, suggesting that this mitochondrial iron importer is essential for promastigote viability. Promastigotes lacking one LMIT1 allele (LMIT1/Δlmit1) showed growth defects and were more susceptible to ROS toxicity, consistent with the role of iron as the essential co-factor of trypanosomatid mitochondrial superoxide dismutases. LMIT1/Δlmit1 metacyclic promastigotes were unable to replicate as intracellular amastigotes after infecting macrophages or cause cutaneous lesions in mice. When induced to differentiate axenically into amastigotes, LMIT1/Δlmit1 showed strong defects in iron content and function of mitochondria, were unable to upregulate the ROS-regulatory enzyme FeSOD, and showed mitochondrial changes suggestive of redox imbalance. Our results demonstrate the importance of mitochondrial iron uptake in trypanosomatid parasites, and highlight the role of LMIT1 in the iron-regulated process that orchestrates differentiation of L. amazonensis into infective amastigotes.

Sensory neurobiology: Muscles power pheromone sensation.

While we understand how the five main sensory organs enable and facilitate stimulus detection, little is known about how the vomeronasal organ enables pheromone sensation. A new study finds specialized muscles poised to coordinate stimulus delivery, dynamics, and arousal.

Dynamics of inflammation-associated plasma proteins following faecal microbiota transplantation in patients with psoriatic arthritis and healthy controls: exploratory findings from the FLORA trial.

OBJECTIVES: The gut microbiota can mediate both pro and anti-inflammatory responses. In patients with psoriatic arthritis (PsA), we investigated the impact of faecal microbiota transplantation (FMT), relative to sham transplantation, on 92 inflammation-associated plasma proteins. METHODS: This study relates to the FLORA trial cohort, where 31 patients with moderate-to-high peripheral PsA disease activity, despite at least 3 months of methotrexate treatment, were included in a 26-week, double-blind, randomised, sham-controlled trial. Participants were allocated to receive either one gastroscopic-guided healthy donor FMT (n=15) or sham (n=16). Patient plasma samples were collected at baseline, week 4, 12 and 26 while samples from 31 age-matched and sex-matched healthy controls (HC) were collected at baseline. Samples were analysed using proximity extension assay technology (Olink Target-96 Inflammation panel). RESULTS: Levels of 26 proteins differed significantly between PsA and HC pre-FMT (adjusted p<0.05), of which 10 proteins were elevated in PsA: IL-6, CCL20, CCL19, CDCP1, FGF-21, HGF, interferon-γ (IFN-γ), IL-18R1, monocyte chemotactic protein 3, and IL-2. In the FMT group, levels of 12 proteins changed significantly across all timepoints (tumour necrosis factor (TNF), CDCP1, IFN-γ, TWEAK, signalling lymphocytic activation molecule (SLAMF1), CD8A, CD5, Flt3L, CCL25, FGF-23, CD6, caspase-8). Significant differences in protein levels between FMT and sham-treated patients were observed for TNF (p=0.002), IFN-γ (p=0.011), stem cell factor (p=0.024), matrix metalloproteinase-1 (p=0.038), and SLAMF1 (p=0.042). FMT had the largest positive effect on IFN-γ, Axin-1 and CCL25 and the largest negative effect on CCL19 and IL-6. CONCLUSIONS: Patients with active PsA have a distinct immunological plasma protein signature compared with HC pre-FMT. FMT affects several of these disease markers, including sustained elevation of IFN-γ. TRIAL REGISTRATION NUMBER: NCT03058900.

Distance Education in Nutrition and Dietetics Education over the Past 30 Years: A Narrative Review.

The coronavirus disease 2019 pandemic necessitated the use of distance education, which sparked a technological transformation that was long overdue in higher education. The purpose of this narrative review is two-fold: to summarize the state of knowledge regarding distance education in nutrition and dietetics education over the past 30 years to inform recommendations for future education/research and implications for practice and to determine the influence that distance education has had on the knowledge, skills, and attitudes of both nutrition and dietetics educators and their students. A narrative review of 822 publications yielded 25 that met the search criteria. In the scope of 30 years, the literature shows that attitudes and perceptions of distance education have changed as barriers to online access have diminished and the availability of online nutrition and dietetics courses and Accreditation Council for Education in Nutrition and Dietetics-accredited distance education programs has expanded. However, whereas the limited results are promising, the paucity of large-sample research about the use of distance education in nutrition and dietetics education restricts educators' knowledge of and ability to evaluate the learning outcomes of distance programs and courses. Moreover, differences in how accreditors, government agencies, and institutions define distance education could have significant influence on funding and financial aid benefits for students and research. Recommendations for future research and implications for practice are provided given the relevance and importance of distance education to nutrition and dietetics education.

Endogenous Derivatives of Linoleic Acid and their Stable Analogs Are Potential Pain Mediators.

Psoriasis is characterized by intense pruritus, with a subset of individuals with psoriasis experiencing thermal hypersensitivity. However, the pathophysiology of thermal hypersensitivity in psoriasis and other skin conditions remains enigmatic. Linoleic acid is an omega-6 fatty acid that is concentrated in the skin, and oxidation of linoleic acid into metabolites with multiple hydroxyl and epoxide functional groups has been shown to play a role in skin barrier function. Previously, we identified several linoleic acid‒derived mediators that were more concentrated in psoriatic lesions, but the role of these lipids in psoriasis remains unknown. In this study, we report that two such compounds-9,10-epoxy-13-hydroxy-octadecenoate and 9,10,13-trihydroxy-octadecenoate-are present as free fatty acids and induce nociceptive behavior in mice but not in rats. By chemically stabilizing 9,10-epoxy-13-hydroxy-octadecenoate and 9,10,13-trihydroxy-octadecenoate through the addition of methyl groups, we observed pain and hypersensitization in mice. The nociceptive responses suggest an involvement of the TRPA1 channel, whereas hypersensitive responses induced by these mediators may require both TRPA1 and TRPV1 channels. Furthermore, we showed that 9,10,13-trihydroxy-octadecenoate‒induced calcium transients in sensory neurons are mediated through the Gßγ subunit of an unidentified G-protein coupled receptor (GPCR). Overall, mechanistic insights from this study will guide the development of potential therapeutic targets for the treatment of pain and hypersensitivity.

Evaluation of Patient Access to Spanish-Language-Concordant Care on a Postpartum Unit.

OBJECTIVE: To evaluate patient access to Spanish-language-concordant care on a postpartum unit and to identify facilitators and barriers to the use of interpretation services. DESIGN: Mixed-methods research study, comprising a cross-sectional chart review from September to December 2019 and semistructured interviews from June to December 2020. SETTING/LOCAL PROBLEM: A tertiary academic medical center in the southeastern United States where individuals with limited English proficiency are at risk for poor health outcomes when they are unable to communicate with clinicians in their preferred language. PARTICIPANTS: We conducted a chart review of 50 randomly selected birthing parent-newborn couplets and interviews with 14 inpatient health care team members. MEASUREMENTS: The chart review examined patient characteristics, health care team composition including Spanish language proficiency, length of stay, number of interpreter requests, and time between clinician interpreter requests and interpreter arrival on the unit. Interviews evaluated facilitators and barriers to interpreter use. RESULTS: Access to a clinician certified in medical Spanish or an interpreter was offered to 12 of 50 (24%) couplets upon admission to the unit and to 7 of 50 (14%) of couplets for daily maternal and newborn medical rounds. Clinicians reported long and unpredictable wait times to access interpreters, which led them to rely on hand gestures, broken Spanish, and smartphone apps to "get by" when communicating with patients without certified interpretation services. Participants described low usage of interpreters for "noncritical" encounters. CONCLUSION: Interpreters and other forms of Spanish-language-concordant care were underused on the postpartum unit. This deviation from national standards may put families at risk for harm. Recommendations from this study include advancing a culture of respectful care, improving the interpreter request workflow, addressing safe staffing, facilitating direct patient access to interpreters, and providing ongoing evaluation and support.

Electronic Screening for Adolescent Risk Behaviors in the Emergency Department: A Randomized Controlled Trial.

INTRODUCTION: In this study we aimed to assess the impact of an electronic health assessment with individualized feedback for risk behaviors in adolescents seeking care in a pediatric emergency department (ED). METHODS: We conducted a randomized control trial using a tablet-based screening program with a study population of adolescents in a busy pediatric ED. The intervention group received the screening program with individualized feedback. The control group received the screening program without feedback. All participants received one-day and three-month follow-up surveys to assess behaviors and attitudes toward health behaviors. RESULTS: A total of 296 subjects were enrolled and randomized. There was no difference in changes in risky behaviors between the control and experimental groups. A higher proportion of participants in the intervention groups reported that the screener changed the way they thought about their health at one-day follow-up (27.0%, 36/133) compared to the control group (15.5%, 20/129, P = .02). CONCLUSION: This study successfully tested a multivariable electronic health screener in a real-world setting of a busy pediatric ED. The tool did not significantly change risky health behaviors in the adolescent population screened. However, our finding that the intervention changed adolescents' perceptions of their health opens a door to the continued development of electronic interventions to screen for and target risk behaviors in adolescents in the ED setting.

Distinct host species correlate with Anaplasma phagocytophilum ankA gene clusters.

Anaplasma phagocytophilum is a gram-negative, tick-transmitted, obligate intracellular bacterium that elicits acute febrile diseases in humans and domestic animals. In contrast to the United States, human granulocytic anaplasmosis seems to be a rare disease in Europe despite the initial recognition of A. phagocytophilum as the causative agent of tick-borne fever in European sheep and cattle. Considerable strain variation has been suggested to occur within this species, because isolates from humans and animals differed in their pathogenicity for heterologous hosts. In order to explain host preference and epidemiological diversity, molecular characterization of A. phagocytophilum strains has been undertaken. Most often the 16S rRNA gene was used, but it might be not informative enough to delineate distinct genotypes of A. phagocytophilum. Previously, we have shown that A. phagocytophilum strains infecting Ixodes ricinus ticks are highly diverse in their ankA genes. Therefore, we sequenced the 16S rRNA and ankA genes of 194 A. phagocytophilum strains from humans and several animal species. Whereas the phylogenetic analysis using 16S rRNA gene sequences was not meaningful, we showed that distinct host species correlate with A. phagocytophilum ankA gene clusters.

A Comparison of Demographic and Psychosocial Characteristics Between Transgender Youth Enrolling Versus Not Enrolling in a Multisite Study.

Purpose: To characterize demographics, psychosocial functioning, and gender-related experiences in transgender youth enrolling versus declining participation in a multisite research study. Methods: Clinical data were abstracted from patient charts at two study sites. Continuous variables were compared using t-tests, and categorical variables were compared using χ 2 tests based on study enrollment status. Results: Few significant differences were observed between enrolled and nonenrolled youth. None of these differences (i.e., designated sex at birth/gender identity; parent-reported separation anxiety; and youth-reported attention deficit/hyperactivity disorder) was replicated across sites. Conclusion: Trans Youth Care findings are likely generalizable to transgender youth initiating hormone treatment at pediatric academic centers.

Impact of a Firearm Safety Device Distribution Intervention on Storage Practices After an Emergent Mental Health Visit.

OBJECTIVE: To determine if providing firearm storage devices with training during clinical care improves safe storage practices in household members of children who present to a pediatric hospital with an emergent mental health complaint. METHODS: Prospective, pre-post study. Enrollment occurred in the emergency department or the inpatient psychiatric unit. Participants in the observation phase received usual care. Participants in the intervention phase were randomized to be offered a firearm storage device at either no or low ($5) cost and trained in its use. We surveyed participants at enrollment, 7, & 30 days post visit. Our primary outcome was triple-safe storage (TSS) - storing firearms unloaded, locked, and with ammunition stored and locked separately. RESULTS: About 256 participants enrolled. In the observation phase TSS increased from 21% (95% confidence interval [CI] 14%-30%) at baseline to 31% (95% CI 21%-42%) at 7 and 31% (95% CI 21%-43%) at 30 days. In the intervention phase, TSS increased from 32% (95% CI 25%-39%) at baseline to 56% (95% CI 48%-64%) at 7 and 56% (95% CI 47%-64%) at 30 days. Among those not practicing TSS at baseline, 7-day TSS was higher in the intervention (38%) versus the observation phase (14%, P = .001). CONCLUSIONS: Distribution and training in the use of firearm storage devices increased TSS in the study population, improves pediatric safety and should be part of the routine care of these high-risk patients.

Ethnic disparities in youth access to tobacco: California statewide results, 1999-2003.

The authors examined the role of youth ethnicity in youth access to tobacco with large, random samples of stores and large samples of ethnically diverse youths for the first time. From 1999 through 2003, White, Black, Latino, and Asian youths made 3,361 cigarette purchase attempts (approximately 700 per year) statewide. Analyses revealed that Black youths had significantly higher access than other youths and that access rates for Black and Asian (but not Latino or White) youths exceeded the Synar-mandated < or = 20%. Clerks who failed to demand youth proof of age identification (ID) sold 95% of the tobacco that youths received and sold significantly more often to minorities and to girls, whereas clerks who demanded youth ID sold equally infrequently to all youths. These findings highlight significant ethnic disparities in youth access to tobacco and imply that those might be eliminated by policies and interventions that increase clerk demands for youth ID.

Identifying oxidized lipid mediators as prognostic biomarkers of chronic posttraumatic headache.

Chronic posttraumatic headache (PTH) is among the most common and disabling sequelae of traumatic brain injury (TBI). Current PTH treatments are often only partially effective and have problematic side effects. We previously showed in a small randomized trial of patients with chronic nontraumatic headaches that manipulation of dietary fatty acids decreased headache frequency, severity, and pain medication use. Pain reduction was associated with alterations in oxylipins derived from n-3 and n-6 fatty acids, suggesting that oxylipins could potentially mediate clinical pain reduction. The objective of this study was to investigate whether circulating oxylipins measured in the acute setting after TBI could serve as prognostic biomarkers for developing chronic PTH. Participants enrolled in the Traumatic Head Injury Neuroimaging Classification Protocol provided serum within 3 days of TBI and were followed up at 90 days postinjury with a neurobehavioral symptom inventory (NSI) and satisfaction with life survey. Liquid chromatography-tandem mass spectrometry methods profiled 39 oxylipins derived from n-3 docosahexaenoic acid (DHA), and n-6 arachidonic acid and linoleic acid. Statistical analyses assessed the association of oxylipins with headache severity (primary outcome, measured by headache question on NSI) as well as associations between oxylipins and total NSI or satisfaction with life survey scores. Among oxylipins, 4-hydroxy-DHA and 19,20-epoxy-docosapentaenoate (DHA derivatives) were inversely associated with headache severity, and 11-hydroxy-9-epoxy-octadecenoate (a linoleic acid derivative) was positively associated with headache severity. These findings support a potential for DHA-derived oxylipins as prognostic biomarkers for development of chronic PTH.

Plasma oxylipins and unesterified precursor fatty acids are altered by DHA supplementation in pregnancy: Can they help predict risk of preterm birth?

Oxidized lipids derived from omega-6 (n-6) and omega-3 (n-3) polyunsaturated fatty acids, collectively known as oxylipins, are bioactive signaling molecules that play diverse roles in human health and disease. Supplementation with n-3 docosahexaenoic acid (DHA) during pregnancy has been reported to decrease the risk of preterm birth in singleton pregnancies, which may be due to effects of DHA supplementation on oxylipins or their precursor n-6 and n-3 fatty acids. There is only limited understanding of the levels and trajectory of changes in plasma oxylipins during pregnancy, effects of DHA supplementation on oxylipins and unesterified fatty acids, and whether and how oxylipins and their unesterified precursor fatty acids influence preterm birth. In the present study we used liquid chromatography-tandem mass spectrometry to profile oxylipins and their precursor fatty acids in the unesterified pool using plasma samples collected from a subset of pregnant Australian women who participated in the ORIP (Omega-3 fats to Reduce the Incidence of Prematurity) study. ORIP is a large randomized controlled trial testing whether daily supplementation with n-3 DHA can reduce the incidence of early preterm birth compared to control. Plasma was collected at study entry (≈pregnancy week 14) and again at ≈week 24, in a subgroup of 48 ORIP participants-12 cases with spontaneous preterm (<37 weeks) birth and 36 matched controls with spontaneous term (≥40 weeks) birth. In the combined preterm and term pregnancies, we observed that in the control group without DHA supplementation unesterified AA and AA-derived oxylipins 12-HETE, 15-HETE and TXB2 declined between weeks 14-24 of pregnancy. Compared to control, DHA supplementation increased unesterified DHA, EPA, and AA, DHA-derived 4-HDHA, 10-HDHA and 19,20-EpDPA, and AA-derived 12-HETE at 24 weeks. In exploratory analysis independent of DHA supplementation, participants with concentrations above the median for 5-lipoxygenase derivatives of AA (5-HETE, Odds Ratio (OR) 8.2; p = 0.014) or DHA (4-HDHA, OR 8.0; p = 0.015) at 14 weeks, or unesterified AA (OR 5.1; p = 0.038) at 24 weeks had higher risk of spontaneous preterm birth. The hypothesis that 5-lipoxygenase-derived oxylipins and unesterified AA could serve as mechanism-based biomarkers predicting spontaneous preterm birth should be evaluated in larger, adequately powered studies.

Effect of Concurrent Gonadotropin-Releasing Hormone Agonist Treatment on Dose and Side Effects of Gender-Affirming Hormone Therapy in Adolescent Transgender Patients.

This retrospective chart review aims to address gaps in the literature regarding the efficacy and interaction of gonadotropin-releasing hormone agonists (GnRHa) and gender-affirming hormone therapies in medical transition regimens in transgender adolescents. We abstracted and reviewed data from 83 patients at our pediatric gender clinic, and found that patients who initiated treatment with GnRHa before gender-affirming hormones (estrogen, testosterone) required lower doses of those hormones than those who did not use GnRHa. The results of this preliminary research provide a foundation for future long-term prospective studies aimed to better understand these relationships.

Central Amygdala Prepronociceptin-Expressing Neurons Mediate Palatable Food Consumption and Reward.

Food palatability is one of many factors that drives food consumption, and the hedonic drive to feed is a key contributor to obesity and binge eating. In this study, we identified a population of prepronociceptin-expressing cells in the central amygdala (PnocCeA) that are activated by palatable food consumption. Ablation or chemogenetic inhibition of these cells reduces palatable food consumption. Additionally, ablation of PnocCeA cells reduces high-fat-diet-driven increases in bodyweight and adiposity. PnocCeA neurons project to the ventral bed nucleus of the stria terminalis (vBNST), parabrachial nucleus (PBN), and nucleus of the solitary tract (NTS), and activation of cell bodies in the central amygdala (CeA) or axons in the vBNST, PBN, and NTS produces reward behavior but did not promote feeding of palatable food. These data suggest that the PnocCeA network is necessary for promoting the reinforcing and rewarding properties of palatable food, but activation of this network itself is not sufficient to promote feeding.

An item reduction analysis of the Group Questionnaire.

There is a constant tension between having measures short enough for daily practice and long enough to provide useful information. Although shorter measures are more convenient for clients, fewer items necessarily mean less information, a loss of psychometrics, and possible floor and ceiling effects. This study examined the effects of shortening the Group Questionnaire (GQ) on its clinical utility and psychometric integrity. Creation of a 12-item GQ (GQ-12) was done using archival data with 1,087 participants gathered from counseling centers, nonclinical process groups, outpatient psychiatric hospitals, and an inpatient state hospital. Testing of the loss of clinical utility was conducted using archival data from 432 group counseling center patients. Analysis for creation of the GQ-12 was done using multilevel structural equation modeling. Items were selected using clinical judgment and statistical judgment considering interitem correlation and factor loading. Model fit was analyzed in comparison with the standards in the literature and with the full-length GQ. Loss of clinical utility was analyzed by comparing alerts generated by the GQ-30 with alerts generated by the GQ-12. The GQ-12 has good model fit and acceptable reliability. A significant number of alerts were lost by reducing the items (status alerts: sensitivity 82-93%, specificity 97-99%; change alerts: sensitivity 52-67%, specificity 99-100%). This study suggests that although it is possible to create a psychometrically sound, shortened version of a feedback measure, clinicians should be aware that helpful information is lost. (PsycINFO Database Record

Small Group Process and Outcome Research Highlights: A 25-Year Perspective.

We summarize major research findings from the past 25 years within the larger evolution of group psychotherapy. Small group process findings are highlighted from a group-as-a-whole, interpersonal relation, subgroup, individual member characteristics, and leader perspective. Special emphasis is given to cohesion and the significant correlation between cohesion and outcome. We note that group therapy is an empirically well-supported treatment for a large number of psychiatric disorders and describe evidence supporting the outcome of various theoretical orientations. Key studies showing outcome equivalence for group and individual therapy are reviewed, followed by a high-level summary of group therapy's efficacy research for depression, bipolar, social phobia, panic disorder, obsessive compulsive, bulimia nervosa, binge-eating, substance-related, trauma-related, HIV/AIDS, breast cancer, chronic pain, schizophrenia, and borderline personality. We conclude with the promise of recent advances for moving the field forward over the next 25 years.