Current views suggest that autism spectrum disorders (ASDs) are characterised by enhanced low-level auditory discrimination abilities. Little is known, however, about whether enhanced abilities are universal in ASD and how they relate to symptomatology. We tested auditory discrimination for intensity, frequency and duration in 21 adults with ASD and 21 IQ and age-matched controls. Contrary to predictions, there were significant deficits in ASD on all acoustic parameters. The findings suggest that low-level auditory discrimination ability varies widely within ASD and this variability relates to IQ level, and influences the severity of restricted and repetitive behaviours (RRBs). We suggest that it is essential to further our understanding of the potential contributing role of sensory perception ability on the emergence of RRBs.

Despite numerous qualitative and cross-sectional studies investigating how dog-related factors may impact owners’ well-being, empirical studies to test these causal effects are lacking. This prospective cohort study examined the correlation and potential causal effect of 17 dog-related factors with six well-being outcomes (depression, anxiety, loneliness, suicidal ideation, hedonic well-being and eudaimonic well-being) in dog owners. Over a four-week period, 709 adult dog owners reported their weekly well-being and occurrence of each dog-related factor (e.g. how many times they ran with their dogs). A random intercept cross-lagged panel model (RI-CLPM) with significance threshold set at 0.001 was used. Six factors correlated with poorer owner well-being (i.e. aggressive dog behaviour, fearful dog behaviour, poor dog health, failure to provide for the dog, lack of control over the dog, and dog presence). Only ‘friendly conversation with others due to the dog’ correlated with better well-being. Purposeful reductions in the frequency of dog behavioural and health-related issues are likely to improve owner well-being, as well as greater consistency in dog care (i.e. provide for the dog) and more engagement in friendly dog-facilitated social interactions. No potential causal effects were significant. Further studies investigating causal relationships are essential to improve people’s well-being through dog ownership.

Dog behavioural problems are one of the main reasons for dog relinquishment. Studies on how dog behavioural problems affect owner well-being are limited. We review the literature concerning the link between dog behavioural problems and owner well-being. We propose practical solutions to minimize the negative impacts of behavioural problems on human well-being and dog welfare, whilst suggesting future research directions. Twenty-one studies were included in the literature review. These indicate that dog behavioural problems may particularly reduce social interactions, and increase negative emotions of high arousal, such as stress and frustration, caregiver burden and symptoms of both depression and anxiety in their owners. To improve both owner well-being and dog welfare, we suggest targeting three areas: practical behavioural support for the dog–human dyad, social support for owners and psychological support for owners. Considering the lack of research in the field, further studies are needed to better understand the relationship between dog behavioural problems and human well-being, such as how the three areas previously mentioned may affect dog relinquishment and owner well-being.

There is a set of hypotheses commonly used in the literature to explain how pets affect human well-being (e.g., pets as social catalysts). Many studies are reported as giving results consistent with one or more of these, but they may not appear to be sufficient to explain the impacts of several pet-related activities on owner well-being. Confirmation bias may also overshadow the consideration of alternative mechanisms. This report aims to review and evaluate a range of psychosocial hypotheses that might help to explain how pets affect the well-being of their owners. This included a theoretical testing of the hypotheses against the recurring themes which emerged from four previously published qualitative frameworks relating to pet-related activities and their well-being outcomes. Twelve psychosocial hypotheses were generated and evaluated using this process: (1) social catalyst-repellent, (2) emotional contagion and empathy, (3) social support, (4) biophilia, (5) attributed fault, (6) social norms, (7) annoyance by noises, (8) routine, (9) caring, (10) exercise, (11) learning, and (12) affective touch. Only three presented potentially contradictory evidence (i.e., social catalyst-repellent, routine, and caring hypotheses), but closer examination revealed that these could not be rejected. These twelve hypotheses are a source of reference for a broader consideration of how pets might affect human well-being. Researchers are encouraged to use, test and/or challenge these hypotheses using established methods of scientific falsification in order to identify which are of the most important in relation to specific owner well-being outcomes.

Autism spectrum disorders (ASD) are a set of neurodevelopmental disorders characterised by behavioural, communication and social impairments. The prevalence of sleep disturbances in children with ASD is 40–80%, with significant effects on quality of life for the children and carers. This systematic review aimed to synthesise evidence of the effects of behavioural interventions to improve sleep among children with ASD. Databases (MEDLINE, PsycINFO, CINAHL, ScienceDirect, Autism Data, CENTRAL, ClinicalTrials.gov and Current Controlled Trials) were searched for published, unpublished and ongoing randomised controlled trials evaluating the effect of non-pharmacological interventions for insomnia in children with autism spectrum conditions. Three studies met the inclusion criteria, one provided actigraphy data, one Children’s Sleep Habits Questionnaire (CSHQ) data, and one both actigraphy and CSHQ data for use in meta-analyses. There were significant differences between the behavioural intervention and comparison groups (actigraphy data) for total sleep time (24.41 minutes, 95% CI 5.71, 43.11, P = 0.01), sleep latency (-18.31 minutes, 95% CI -30.84, -5.77, P = 0.004) and sleep efficiency (5.59%, 95% CI 0.87, 10.31, P = 0.02). There was also a favourable intervention effect evident for the subjective CSHQ data (-4.71, 95% CI -6.70, -2.73, P<0.00001). Risk of bias was low across several key domains (randomisation, allocation concealment and reporting), with some studies being unclear due to poor reporting. There are very few high quality randomised controlled trials in this area. Here we provide initial synthesised quantitative evidence of the effectiveness of behavioural interventions for treating sleep problems in children with ASD. Protocol was registered (CRD42017081784) on the International Prospective Register of Systematic Reviews (http://www.crd.york.ac.uk/PROSPERO).

Cross-sectional comparisons of well-being between dog owners and non-owners commonly generate inconsistent results. Focusing on the uniqueness of the relationship might help address this issue and provide a stronger foundation for dog-related psychotherapeutic interventions. This study aims to evaluate the impact of dog-related activities (e.g., exercising the dog) on owner hedonic well-being, life satisfaction and eudaimonic well-being. It was also hypothesised that psychological closeness to the dog would affect these well-being outcomes. For this study, 1030 dog owners aged over 18 years old answered an online questionnaire about the impact of 15 groups of dog-related activities on their well-being. Ordinal regressions were used to estimate the mean response (and its uncertainty) for each outcome, while conditioning for psychological closeness to the dog and controlling for several key covariates. Tactile interactions and dog playing were significantly more beneficial than other activities for hedonic well-being, and dog training and dog presence for eudaimonic well-being. In contrast, dog health issues and behavioural problems were linked to decrements in these well-being outcomes. Higher psychological closeness to the dog predicted greater improvement in well-being in positive dog-related activities. Our quantitative study validates the general findings of previous qualitative work and lays the groundwork for future longitudinal studies.