Social Interaction Profiles Among Youth with Intellectual Disabilities: Associations with Indicators of Psychosocial Adjustment

This study investigates the nature of the social interaction profiles observed among youth with intellectual disabilities (ID), defined while considering their relationships with their parents, peers, and teachers, as well as the implication of these profiles for self-esteem, aggressive behaviors, and prosocial behaviors. A sample of 393 youth with mild (48.2%) to moderate (51.8%) levels of ID, aged between 11 and 22 (M = 15.70), was recruited in Canada (n = 141) and Australia (n = 253). Our results revealed four profiles, corresponding to Socially Isolated (23.24%), Socially Integrated (39.83%), Socially Rejected (28.37%) and Socially Connected (8.57%) youth with ID. The socially integrated and connected profiles both presented higher self-esteem, more prosocial behaviors, and less aggressive behaviors than the socially isolated and rejected profiles.

Longitudinal Associations Between Relationship Quality and Depression Among Youth with Intellectual Disabilities: A Latent Change Perspective

This study investigates associations between initial levels and change in the quality of the relationships youth with intellectual disabilities (ID) share with their parents and teachers, and changes in their levels of depression over time. A sample of 395 youth with mild (48.3%) and moderate (51.7%) ID, aged between 11 and 22 (M = 15.69), were recruited in Canada (n = 142) and Australia (n = 253). Youth completed self-report measures of relationship quality and depression twice over a one-year period. Initial levels of warmth (β = - .109) and conflict (β = - .302) predicted decreases in depression. Increases in warmth predicted decreases in depression (β = - .179), while increases in conflict predicted increases in depression (β = .268). Discrepancies between youth relationships with their parents and teachers predicted decreases in depression (βwarmth = - .732; βconflict = - .608).

Perceptions of a virtual reality sensory room for adults with neurodevelopmental disabilities

PURPOSE

Mental ill health and sensory processing difficulties often limit participation in everyday life for adults with neurodevelopmental disabilities. Interventions using technology such as virtual reality (VR) are increasingly accessible and may mitigate these difficulties. Understanding what contributes to the successful implementation of novel interventions is important for future use and evaluation. This study aimed to explore the feasibility of implementing a VR sensory room for adults with neurodevelopmental disabilities, their carers and support staff and to explore future iterations of the product and process.

MATERIALS AND METHODS

Thirteen stakeholders who participated in a pilot trial of a VR sensory room were interviewed. Interviews were recorded and transcribed verbatim for thematic analysis.

RESULTS

Eleven themes were identified which indicated that adults with neurodevelopmental disabilities found the VR sensory room to be mostly acceptable and enjoyable with usage largely consistent. Individual variation and support requirements were highlighted for each user. Future use may require modifications to the headset, in-built customisation options as well as buy-in and training for support staff.

CONCLUSIONS

The VR Sensory room is a promising tool to support adults with neurodevelopmental disabilities and results warrant further scaled research into the impact of this tool on outcomes for adults with disabilities.Implications for RehabilitationWhilst adults with neurodevelopmental disabilities may experience sensory processing difficulties which impact their everyday life, there is a paucity of interventions to address these difficulties.Implementation studies offer the opportunity to explore how evidence-based interventions may be implemented to facilitate the best outcomes.A Virtual Reality Sensory Room may offer an innovative alternative to a traditional sensory room for adults with neurodevelopmental disabilities where implementation is well supported.

School Experiences and Anxiety Trajectories Among Youth with Intellectual Disabilities

This study investigated how the school experiences and personal characteristics of youth with Intellectual Disabilities (ID) contribute to their longitudinal trajectories of anxiety. To this end, we relied on a sample of 390 youth with mild (48.2%) to moderate (51.8%) levels of ID, aged from 11 to 22 (M = 15.70), and recruited in Canada (n = 140) and Australia (n = 250). Across three yearly time points, all participants completed self-report measures of anxiety, school climate, and victimization. Our results revealed a slight normative decrease in anxiety over time and showed that experiences of school victimization were associated with higher levels of anxiety (initially and momentarily) and increases in victimization were accompanied by increases in anxiety over time. Perceptions of attending a school that fosters security and promotes learning also tended to be accompanied by lower levels of anxiety (initially and momentarily). Momentary increases in perceptions of attending a school that fosters positive peer interactions were associated with momentary decreases in anxiety, whereas momentary increases in perceptions of attending a school characterized by positive teacher-student relationships and an equitable treatment of all students both led to small momentary increases in anxiety once all other components of student school experiences were considered. The theoretical and practical implications of these results are discussed.

Effectiveness of sensory adaptive dental environments to reduce psychophysiology responses of dental anxiety and support positive behaviours in children and young adults with intellectual and developmental disabilities: a systematic review and meta-analyses

BACKGROUND

People with Intellectual and developmental disabilities (IDDs) experience oral health inequality due to myriad of risk factors and complex needs. Sensory processing difficulties, maladaptive behaviours and dental anxiety contribute to difficulties in receiving preventive and routine dental treatments. This study aimed to systematically review the evidence on the effectiveness of sensory adaptive dental environments (SADE) for children and young adults (up to the ages 24 years) with IDD to address cooperation and dental anxiety.

METHODS

This review was reported according to The Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) guidelines. MEDLINE (Ovid), The Cochrane Library, Embase, Google Scholar, Web of Science and OT Seeker were searched using appropriate terms to identify Randomised Control Trails (RCTs) that matched inclusion criteria. Screening was conducted by two reviewers after de-duplication based on titles and abstracts followed by full text retrieval. Quality of the included studies was assessed using Cochrane Risk of Bias (ROB)-2 for crossover trials and data extracted by two reviewers. The details of the interventions and effectiveness were compared and discussed narratively, and comparable outcomes were included to meta-analyses using R software.

RESULTS

A total of 622 articles were identified and five articles met eligibility for inclusion. Three studies used multi-sensory adaptations and one used single sensory adaptation of music. Narrative synthesis showed some evidence of SADE reducing magnitude and duration, although, questionable for reducing the number of maladaptive behaviours. Two studies demonstrated conflicting evidence of the effect of SADE on cooperation. Three studies demonstrated significant positive impact of SADE on psychophysiological outcomes. Despite an overall tendency to favour SADE, no statistically significant difference of maladaptive behaviours was found between SADE and regular dental environment (RDE) (Standardised mean change (SMC) = 0.51; 95% Confidence Interval (CI) -0.20 to 1.22; p = 0.161). SADE was superior to RDE (SMC -0.66; 95% CI -1.01 to -0.30; p =  < 0.001) in reducing psychophysiological responses of dental anxiety.

CONCLUSION

Current evidence suggests that adapting visual, tactile, and auditory aspects of the dental environment in a single or multi-sensory approach demonstrates small positive effects on psychophysiological responses and maladaptive behaviours of dental anxiety for people with IDD.

TRIAL REGISTRATION

The title of this review was registered with PROSPERO (CRD42022322083).

Evaluating a virtual reality sensory room for adults with disabilities

Sensory processing difficulties can negatively impact wellbeing in adults with disabilities. A range of interventions to address sensory difficulties have been explored and virtual reality (VR) technology may offer a promising avenue for the provision of sensory interventions. In this study, preliminary evidence about the impact of Evenness, an immersive VR sensory room experience, for people with disabilities was investigated via a single intervention pre-post mixed methods design. Quantitative methodology included single intervention pre-post design (five month timeframe) with 31 adults with various developmental disabilities to determine the impact of use of aVR sensory room using a head mounted display (HMD) in relation to anxiety, depression, sensory processing, personal wellbeing and adaptive behaviour. Qualitative semi-structured interviews were also conducted with thirteen purposefully selected stakeholders following Evenness use. Results indicated significant improvements in anxiety, depression and sensory processing following Evenness use. Qualitative analysis corroborated the anxiety findings. No significant changes were observed in personal wellbeing or adaptive behaviour. Results are promising and indicate that a VR sensory room may have a positive impact on anxiety, depression and sensory processing for adults with disabilities. A longer study timeframe and a more rigorous experimental methodology is needed to confirm these findings.

A psychometric validation of the motives for physical activity measure for youth with intellectual disabilities (MPAM-ID)

PURPOSE

To validate a version of the Motives for Physical Activity Measure (MPAM) adapted for youth with intellectual disabilities (ID).

MATERIALS AND METHODS

A sample of 359 youth with mild to moderate ID from Australia and Canada respectively completed English and French versions of the MPAM-ID.

RESULTS

Exploratory structural equation models supported the validity and reliability of the five-factor structure of the MPAM-ID, as well as the weak, latent variance-covariance, and latent mean invariance across linguistic versions. Additional results supported the partial strong and strict invariance of most MPAM-ID items across linguistic versions. The results also supported the complete measurement invariance of the MPAM-ID over time and revealed a lack of differential item functioning (DIF) as a function of youth's age, body-mass index (BMI), ID level, and frequency of sport involvement (FSI). However, partial DIF was found as a function of youth's sex. Additionally, latent mean differences in MPAM-ID's factors were found as a function of youth's ID level, sex, and FSI. Finally, results supported the convergent validity of the MPAM-ID factors with a measure of perceived physical abilities.

CONCLUSION

The MPAM-ID can be used among English- and French-speaking youth with ID irrespective of their age, BMI, ID level, sex, and FSI.IMPLICATIONS FOR REHABILITATIONWe propose English and French adaptations of the Motives for Physical Activity Measure for Youth with Intellectual Disabilities (MPAM-ID).The MPAM-ID was able to identify the same motives as the original measure.The MPAM-ID will facilitate the assessment of motives for physical Activity in cross-sectional and longitudinal studies.The MPAM-ID will facilitate the assessment of motives for physical Activity among English- and French-speaking youth with ID.The MPAM-ID could be used to compare youth motives for physical Activity as a function of their age, body-mass index, ID level, and frequency of sport involvement.

Development and Validation of a Multi-informant Measure of Social Behaviors for Youth with Intellectual Disabilities

Youth with intellectual disability (ID) are at an increased risk of displaying fewer prosocial behaviors and more numerous aggressive behaviors in various environments. This study proposes a new multi-informant (youth, teachers, and parents) measure of social behaviors for youth with ID. The sample includes 348 youth with mild (51.41%) and moderate (48.59%) levels of ID, aged 11-22 years old (M = 15.73, SD = 2.14; including 138 females), enrolled in secondary schools in Canada (French-speaking; N = 116; 33.33%) and Australia (English-speaking; N = 232; 66.67%). Measures were completed by the participants, their teachers, and their parents. Results support the reliability, factor validity, discriminant validity (in relation to sex, ID level, and country), concurrent validity (with measures of victimization, depression, hyperactivity-inattention), and one-year test-retest stability of the measure. Youth, teachers, and parents all provided a complementary perspective on youth social behaviors, consistent with youth adjusting their behaviors to the various environments in which they share social interactions.

Toward a Comprehensive Assessment of Relationships with Teachers and Parents for Youth with Intellectual Disabilities

This study proposes a multi-informant (youth, teachers, and parents) measure of relationship quality with adults for youth with intellectual disabilities (ID). A sample of 395 youth with mild (49.15%) and moderate (50.85%) ID, aged 11-22 (M = 15.82) was recruited in Canada (French-speaking, N = 142), and Australia (English-speaking, N = 253). Results support the reliability, factor validity, discriminant validity (in relation to sex, ID level, country, and comorbidity), convergent validity (depression, anxiety, aggressiveness, and prosocial behaviors), and one-year longitudinal stability of the measure. Youth self-reports provide a complementary perspective on relationship quality with adults relative to teachers' or parents' reports, whereas teachers and parents seem unable to differentiate their own perspective from that of the target youth.

The intrusion of polluted Fly River mud into Torres Strait

There is a concern that the Fly River plume from Papua New Guinea (PNG) may be delivering mine-derived polluted mud along the southern PNG coast into the northern Torres Strait, which is the northernmost extent of the Great Barrier Reef. To quantify this threat, the mud transport dynamics along the southern PNG coast were studied using the SLIM model. The model was qualitatively verified using historical field data on sediment dynamics and compared with more recent satellite-derived turbidity data. During strong south east winds and spring tides, about 5.4% of the Fly River mud discharge enters the Torres Strait, in agreement with previous field-derived results. The annual net movement of mud is westward, thus polluted Fly River mud progressively intrudes into Torres Strait. This intrusion is slow and may take a century to reach in significant quantities at Saibai Island, the nearest Australian island to the Fly River. Field data are needed to fully validate the model and provide greater confidence in these results.

Mathematics Motivation in Students With Low Cognitive Ability: A Longitudinal Study of Motivation and Relations With Effort, Self-Regulation, and Grades

Expectancy-value theory (EVT) is a popular framework to understand and improve students' motivation. Unfortunately, limited research has verified whether EVT predictions generalize to students with low levels of cognitive ability. This study relies on Grade 5 and 8 data from 177 students with low levels of cognitive ability and a matched sample of 177 students with average to high cognitive ability from the German "Project for the Analysis of Learning and Achievement in Mathematics." Results showed that students with low levels of cognitive ability were able to differentiate EVT components. Both groups demonstrated a similar downward developmental trend in motivation from early to middle adolescence, and similar relations between EVT components and levels of efforts, self-regulation, and mathematics class grades.

The moderating role of teacher-student relationships on the association between peer victimization and depression in students with intellectual disabilities

BACKGROUND

Students with intellectual disabilities (ID) are at increased risk of peer victimization and depressive symptoms. Little is known about the protective and aggravating factors that influence the association between peer victimization and depressive symptoms among students with ID.

AIMS

This study assesses the moderating role of two facets of teacher-student relationships (TSR)-warmth and conflict-on the association between peer victimization and depressive symptoms.

METHODS

A sample of 395 students (aged 11-22) with mild and moderate ID was recruited in Canada and Australia.

RESULTS

Hierarchical multiple regressions indicated that victimization and TSR conflict were both associated with higher levels of depressive symptoms, and that TSR conflict moderated the associations between both TSR warmth and victimization, and depressive symptoms. TSR warmth was related to lower levels of depression only for students who also reported a low level of TSR conflict. Similarly, associations between victimization and depression were weaker among students exposed to more conflictual TSR.

CONCLUSIONS

Students with ID are at increased risk of developing depressive symptoms when exposed to negative social relationships (i.e., peer victimization or TSR conflict). For these students, the benefits of TSR warmth were far less important than the consequences of conflict.

A Systematic Review Protocol Investigating Community Gardening Impact Measures

Existing community gardening research has tended to be exploratory and descriptive, utilising qualitative or mixed methodologies to explore and understand community garden participation. While research on community gardening attracts growing interest, the empirical rigour of measurement scales and embedded indicators has received comparatively less attention. Despite the extensive body of community gardening literature, a coherent narrative on valid, high quality approaches to the measurement of outcomes and impact across different cultural contexts is lacking and yet to be comprehensively examined. This is essential as cities are becoming hubs for cultural diversity. Systematic literature reviews that explore the multiple benefits of community gardening and other urban agriculture activities have been undertaken, however, a systematic review of the impact measures of community gardening is yet to be completed. This search protocol aims to address the following questions: (1) How are the health, wellbeing, social and environmental outcomes and impacts of community gardening measured? (2) What cultural diversity considerations have existing community garden measures taken into account? Demographic data will be collected along with clear domains/constructs of experiences, impacts and outcomes captured from previous literature to explore if evidence considers culturally heterogeneous and diverse populations. This will offer an understanding as to whether community gardening research is appropriately measuring this cross-cultural activity.

Do Exercise Interventions Improve Balance for Children and Adolescents With Down Syndrome? A Systematic Review

BACKGROUND

Youths with Down syndrome are characterized by deficits in balance/postural stability. One way to palliate balance deficits among this population is through exercise interventions. However, to the authors' knowledge, the effects of exercise interventions designed to improve the balance of youths with Down syndrome have never been systematically reviewed.

PURPOSE

The purpose of this review was to summarize the findings from studies examining the effects of exercise interventions designed to improve balance in youths with Down syndrome.

DATA SOURCES

A systematic literature search was performed in 10 databases (Academic Search Complete, CINAHL Plus With Full-Text, Education Source, ERIC, Medline With Full-Text, PsycARTICLES, Psychology and Behavioral Sciences Collection, Scopus, SocINDEX, and SPORTDiscus With Full-Text) on June 12, 2017.

STUDY SELECTION

Randomized controlled trials and controlled trials examining the effects of exercise interventions designed to improve balance in youths with Down syndrome were included.

DATA EXTRACTION

Two authors selected the studies and extracted their characteristics and results. Three authors assessed the risk of bias in the studies using the Cochrane Collaboration tool.

DATA SYNTHESIS

Eleven studies, published between 2010 and 2017, met the inclusion criteria. The findings showed that exercise interventions were more effective than control conditions for improving the static balance of children with Down syndrome and the static-dynamic balance (ie, global balance score obtained with a scale measuring both static and dynamic balance) of children and adolescents with Down syndrome. Nevertheless, the findings on dynamic balance in children and static balance in adolescents were inconclusive.

LIMITATIONS

With a small number of studies and their high risk of bias, the present findings must be interpreted with caution.

CONCLUSIONS

The reviewed exercise interventions were successful in improving the static balance of children with Down syndrome and the static-dynamic balance of children and adolescents with Down syndrome.

Exercise interventions to improve balance for young people with intellectual disabilities: a systematic review and meta-analysis

AIM

To conduct a systematic review and meta-analysis of the effects of exercise interventions designed to improve balance in young people with intellectual disabilities.

METHOD

A systematic literature search was performed on 10 databases. Studies in press or published in English in a peer-reviewed journal were included if: (1) participants were young people with intellectual disabilities; (2) exercise interventions were designed to improve balance; and (3) they used quasi-experimental or experimental designs. Studies focusing only on a specific subpopulation of young people with intellectual disabilities or having a specific physical characteristic were excluded. Risk of bias was assessed for randomization, allocation sequence concealment, blinding, incomplete outcome data, selective outcome reporting, and other biases.

RESULTS

The search strategy identified 937 articles and 15 studies, published between 1991 and 2017, that met the inclusion criteria. Exercise intervention groups showed a significant and larger improvement in static (pooled effect size, Hedges' g=0.98) and dynamic (g=1.34) balance compared with the control groups. However, although the pooled improvement of static-dynamic balance was large (g=2.80), the result was non-significant. None of the subgroup analyses were significant, except for the improvement in: (1) static balance (higher in quasi-experimental than in experimental studies); and (2) dynamic balance (higher in young people with a mild vs a mild-moderate intellectual disability).

INTERPRETATION

The reviewed exercise interventions seem to represent an effective means for improving the static and dynamic balance of young people with intellectual disabilities. However, the present findings should be considered as preliminary given the small number of studies and their limitations.

WHAT THIS PAPER ADDS

Exercise intervention results in large and significant improvements in static and dynamic balance in young people with intellectual disabilities. Exercise intervention results in a large but non-significant improvement in static-dynamic balance. Static balance improvement was significantly higher in quasi-experimental versus experimental studies. Dynamic balance improvement was significantly higher in young people with mild versus mild-moderate intellectual disability. No significant differences related to age group, balance measures, and components of exercise intervention were found.

Self-concept research with school-aged youth with intellectual disabilities: A systematic review

BACKGROUND

Research on the self-concept of youth with intellectual disabilities has not been summarized in more than four decades. The present systematic review addresses this gap.

METHOD

A systematic literature search was performed in nine databases and 21 studies, published between 1979 and 2017, met our inclusion criteria.

RESULTS

Significant differences between the self-concepts of youth with intellectual disabilities and typically developing (TD) youth were found in: (a) cognitive-academic self-concept in disfavour of youth with intellectual disabilities; (b) global self-concept and cognitive-academic self-concept in disfavour of children with intellectual disabilities; and (c) global, behavioural, and cognitive-academic self-concept in disfavour of youth with intellectual disabilities schooled in a special class. Additionally, except for age, intellectual functioning and school placement, no significant relations were found between the self-concept dimensions and academic achievement and sex.

CONCLUSION

Studies on self-concept research with school-aged youth with intellectual disabilities have several weaknesses that need to be advanced in future research.

Combining Acceptance and Commitment Therapy With Adventure Therapy to Promote Psychological Wellbeing for Children At-Risk

With high rates of psychological distress reported amongst children internationally, the development and evaluation of new program initiatives is critical in order to meet the challenge of this burgeoning issue. Both acceptance and commitment therapy and adventure therapy are emerging as popular strategies to elevate psychological wellbeing. This small-scale program evaluation focuses on nine upper primary school-aged children enrolled in a specialist school in Australia for children with challenging behavior and/or emotional needs. Participants completed a newly developed 8-week intervention entitled ‘ACT in the Outdoors’ which combined key principles of both acceptance and commitment therapy and adventure therapy. The program was evaluated via a combination of pre and post participant psychological measures, and post interviews with participants and teachers. The results of this small-scale preliminary evaluation suggest that a portion of the participating children reported improvements in psychological wellbeing and skill development. Improvements appear to be mitigated by attendance and level of psychological wellbeing upon program entry. Based on this premise, the results suggest that more research is warranted to further understand the potential benefit of this innovative interdisciplinary approach.

Prevalence of anxiety and depressive disorders among youth with intellectual disabilities: A systematic review and meta-analysis

BACKGROUND

The purpose of this meta-analytic study was to determine the pooled prevalence estimates of anxiety and depressive disorders among children and adolescents with intellectual disabilities (ID) and to assess the extent to which these pooled prevalence rates differed according to studies' characteristics.

METHOD

A systematic literature search was performed in nine databases and 21 studies, published between 1975 and 2015, met the inclusion criteria.

RESULTS

The resulting pooled prevalence estimates of combined subtypes of anxiety and depressive disorders were respectively (a) 5.4% and 2.8% across samples; (b) 1.2% and 0.03% among children; and (c) 7.9% and 1.4% among adolescents. Pooled prevalence estimates for specific subtypes of anxiety disorders ranged from (a) 0.2% to 11.5% across samples; (b) 0.7% to 17.6% among children; and (c) 0.6% to 19.8% among adolescents. Pooled prevalence estimates of dysthymic disorder and major depressive disorder were respectively (a) 3.4% and 2.5% across samples; (b) 2.1% and 3.2% among children; and (c) 6.9% and 5.7% among adolescents. Finally, subgroup analyses showed significant variations in the pooled prevalence estimates of combined subtypes of anxiety disorders, obsessive-compulsive disorder, and generalized anxiety disorder; and combined subtypes of depressive disorders.

LIMITATIONS

The present findings of this meta-analysis should be interpreted with caution given several limitations related to the characteristics of the populations, diagnostic method and sampling method.

CONCLUSION

Findings provide recommendations for future studies investigating psychological disorders among youth with ID, as well as how clinicians and policy makers can improve diagnostic practices and support for youth with ID.

Static postural control among school-aged youth with Down syndrome: A systematic review

BACKGROUND

Youth with Down syndrome are characterized by motor delays when compared to typically developing (TD) youth, which may be explained by a lower postural control or reduced postural tone.

OBJECTIVE

In the present article, we summarize research comparing the static postural control, assessed by posturography, between youth with Down syndrome and TD youth.

METHODS

A systematic literature search was performed in 10 databases and seven studies, published between 2001 and 2017, met our inclusion criteria.

RESULTS

Based on the present reviewed findings, it is impossible to conclude that children with Down syndrome present significantly lower static postural control compared to TD children. In contrast, findings showed that adolescents with Down syndrome tended to present significantly lower static postural control compared to TD adolescents when visual and plantar cutaneous inputs were disturbed separately or simultaneously.

CONCLUSION

The present findings should be interpreted with caution given the limitations of the small number of reviewed studies. Therefore, the static postural control among youth with Down syndrome should be further investigated in future rigorous studies examining the contribution of a range of sensory information.

Self-Esteem Trajectories and Their Social Determinants in Adolescents With Different Levels of Cognitive Ability

This study examines the development of self-esteem in a sample of 138 Australian adolescents (90 males; 48 females) with cognitive abilities in the lowest 15% (L-CA) and a matched sample of 556 Australian adolescents (312 males; 244 females) with average to high levels of cognitive abilities (A/H-CA). These participants were measured annually (Grade 7 to 12). The findings showed that adolescents with L-CA and A/H-CA experience similar high and stable self-esteem trajectories that present similar relations with key predictors (sex, school usefulness and dislike, parenting, and peer integration). Both groups revealed substantial gender differences showing higher levels of self-esteem for adolescent males remaining relatively stable over time, compared to lower levels among adolescent females which decreased until midadolescence before increasing back.

Applying Positive Psychology to Illuminate the Needs of Adolescent Males Transitioning Out of Juvenile Detention

Reducing the recidivism of young offenders is a critical research issue, not only to enhance the future outcomes for the young person but also to reduce the future risk to the community. Navigating the immediate transition from detention back into the community is positioned as a critical milestone. This small qualitative study describes how young offenders participating in a formal mentoring program in Australia experienced the transition from detention to the community and the intrinsic drivers of their behaviour throughout this transition. Perspectives of their mentors and caseworker were also solicited. Importantly, their stories were interpreted through the lens of positive psychology and self-determination theory to discuss the relevance of one's pursuit of autonomy, relatedness, and competence. Increasing our understanding of these intrinsic motivators will assist young offenders to pursue a better life away from crime and benefit both themselves and the wider community.

A study protocol for Truce: a pragmatic controlled trial of a seven-week acceptance and commitment therapy program for young people who have a parent with cancer

BACKGROUND

This paper presents the rationale and study protocol for a pragmatic controlled effectiveness trial of Truce, a prevention-based selective intervention targeting the significant mental health needs of young people who have a parent with cancer.

METHODS/DESIGN

Truce is a seven week, facilitated, face-to-face group program. The design is a 2 groups (intervention vs control) x 3 (pre-treatment vs post-treatment vs 2 month follow-up) repeated measures. Allocation to groups will be dependent upon recruitment; when groups have sufficient numbers, they will be assigned to the intervention condition, but participants recruited without a viable group will be assigned to the wait-list control condition. Eligible participants are young people aged 14 to 22 years who have a parent diagnosed with cancer within the last 5 years. Wait-list controls are offered the opportunity to participate in the program once they have completed their follow-up questionnaires. The target sample size is 65 participants in each condition. The primary hypothesis is that participants in the intervention will show significant reductions in distress and increases in psychological well-being relative to participants in the wait-list control group, and these effects will continue through two-month follow-up. Mixed-models analysis of variance will be used to measure differences between the two conditions. Secondary analyses will focus on variables which may relate to the effectiveness of the intervention: ACT-related concepts of experiential avoidance and mindfulness, family functioning, unmet needs and demographic variables. We will also assess program fidelity and satisfaction.

DISCUSSION

The development and evaluation of a manualised intervention for young people with a parent with cancer responds to a gap in the provision of empirically-based psychological support for this vulnerable group.

TRIAL REGISTRATION

Australian and New Zealand Clinical Trials Registry ACTRN12615000761561. Registered 22(nd) July 2015.

Caspase-1 processes IFN-gamma-inducing factor and regulates LPS-induced IFN-gamma production

Interferon-gamma-inducing factor (IGIF, interleukin-18) is a recently described cytokine that shares structural features with the interleukin-1 (IL-1) family of proteins and functional properties with IL-12. Like IL-12, IGIF is a potent inducer of interferon (IFN)-gamma from T cells and natural killer cells. IGIF is synthesized as a biologically inactive precursor molecule (proIGIF). The cellular production of IL-1beta, a cytokine implicated in a variety of inflammatory diseases, requires cleavage of its precursor (proIL-1beta) at an Asp-X site by interleukin-1beta-converting enzyme (ICE, recently termed caspase-1). The Asp-X sequence at the putative processing site in proIGIF suggests that a protease such as caspase-1 might be involved in the maturation of IGIF. Here we demonstrate that caspase-1 processes proIGIF and proIL-1beta with equivalent efficiencies in vitro. A selective caspase-1 inhibitor blocks both lipopolysaccharide-induced IL-1beta and IFN-gamma production from human mononuclear cells. Furthermore, caspase-1-deficient mice are defective in lipopolysaccharide-induced IFN-gamma production. Our results thus implicate caspase-1 in the physiological production of IGIF and demonstrate that it plays a critical role in the regulation of multiple proinflammatory cytokines. Specific caspase-1 inhibitors would provide a new class of anti-inflammatory drugs with multipotent action.

IgE and monoclonal antibody reactivities to the major shrimp allergen Pen a 1 (tropomyosin) and vertebrate tropomyosins

Pen a 1, the major shrimp allergen from brown shrimp Penaeus aztecus has been identified as the muscle protein tropomyosin. To identify Pen a 1 IgE binding sites, the reactivities of Pen a 1-specific monoclonal antibodies (mAbs) and shrimp-allergic subjects' IgE to shrimp and homologous mammalian tropomyosins were analyzed. Pen a 1, purified by preparative SDS-PAGE and commercially obtained porcine, bovine and rabbit tropomyosin were cleaved by CNBr or digested by endoproteinases Lys-C, Glu-C, trypsin, Arg-C and chymotrypsin. Reactivities of Pen a 1-specific mAbs and IgE to the resulting peptides were analyzed by dot blot and immunoblotting. The dot blot analysis showed that mAbs and IgE antibodies did not react with any of the mammalian tropomyosins. The immunoblot analysis showed that all Pen a 1 digests bound IgE or mAbs. However, not all peptides in each digest possessed an IgE binding site. IgE binding intensity and frequency varied by subject and peptide digest. IgE and mAb reactivity patterns were similar but no mAb reproduced the IgE binding patterns indicating that subject' IgE bound some epitopes that were not recognized by the Pen a 1-specific mAbs. These studies suggest that IgE-binding epitopes are restricted to certain parts of the Pen a 1 molecule, Pen a 1 may have several similar epitopes, and that Pen a 1 epitopes do not appear to be located in the highly homologous parts of the tropomyosin molecule.

Effects of plume produced by the Nd:YAG laser and electrocautery on the respiratory system

Sprague-Dawley rats were exposed to Nd:YAG laser exhaust (contact and noncontact) as well as to electrocautery exhaust passed through smoke evacuation filters. Exposure periods for each group were equal and increasing in time. Histologic analysis revealed alveolar congestion and emphysematous changes in all modes. Controls exhibited similar change but to a milder degree. It appears that any plume produced by lasers or electrosurgical devices produces pathologic change in rat lungs and that effective smoke evacuation will help control these effects.

Asymmetries of vertical vestibular nystagmus in the cat

In the cat, the asymmetry of vertical nystagmus in response to a rotation around the Y-axis has been characterized by measuring the beat frequency and gain of vestibulo-ocular reflexes in each direction (upward and downward). Sinusoidal variations of head velocity or velocity steps have been applied under three visual conditions (a) in darkness (pure vestibular stimulation); (b) in the light (mixed vestibular and optokinetic stimulation); (c) with a mirror placed in front of the animal; since the mirror image moved with the head, the animal was provided with a stable visual cue (stabilized vision). In all three conditions, beat frequency and gain were greater for downward than for upward nystagmus (the direction refers to that of the quick phase). In darkness, the characteristics of postrotatory nystagmus suggested a greater time constant for downward than for upward vestibulo-ocular reflexes. In the light, both stimuli acted synergistically. In stabilized vision, upward vestibular nystagmus was preferentially suppressed, suggesting an algebraic summation of the effects arising from both kinds of stimuli.

Natural killer cells. In vitro and in vivo

A nonadherent, nonphagocytic mouse cell found in lymphoid organelles, but lacking characteristic surface markers of mature lymphocytes, is capable of lysing a wide spectrum of tumor cells but shows little cytolytic activity toward normal cells. This cytotoxic cell, termed a "natural killer" (NK) cell, shows a marked capacity to lyse lymphomas (syngeneic, allogeneic, or even xenogeneic) to the effector cell source. Its activity is inhibited by a variety of pharmacologic agents, eg, cytochalasins, cAMP-"active" drugs, and colchicine, over the same dose range at which these drugs inhibit other cytotoxic cells. We have no evidence that NK cell "specificities" are clonally distributed. Two sets of evidence are presented which suggest that the same NK cell population is responsible for lysing a variety of tumor target cells. Preliminary evidence suggests that modulation of NK cell levels in vivo is correlated with resistance to challenge with a syngeneic tumor, inferring that NK cells may play a salient role in host defenses against neoplasia.

Killer cells: a functional comparison between natural, immune T-cell and antibody-dependent in vitro systems

Previous reports have shown that spleen cells from nonimmune adult mice of certain strains do regularly kill Moloney leukemia virus-induced lymphomas in short-term 51Cr release assays. This naturally occuring killer (NK) cell had low adherent properties and had the morphological appearance of a lymphocyte. Still it lacked surface characteristics of mature T or B lymphocytes. In the present report a functional study was carried out, comparing in parallel the NK system, the T-cell killing across an H-2 barrier (anti-P815), and the antibody-dependent cell-mediated chicken red blood cell (CRBC) system. In contrast to the effector cells in the CRBC system, the NK cells were insensitive to erythrocyte antibody complement (EAC) rosette depletion and would pass through nylon wool columns. NK activity was not inhibited by the presence of heat-aggregated human or mouse gamma globulin, in contrast to the strong inhibition noted in the CRBC system. Sensitivity to trypsin pretreatment was noted in the NK system as well as in the immune P815 system, whereas the CRBC system was relatively trypsin resistant. Antitheta plus complement eliminated the anti-P815 activity, but did not touch the NK activity. The present results thus further distinguish the NK cell from cytotoxic T lymphocytes or from antibody-dependent killer cells.