Suchergebnisse

People with blindness and visual impairments have reduced access to exercise compared to the general population during typical societal functioning. The Coronavirus-19 pandemic completely disrupted daily life for most individuals worldwide, and in the United Kingdom, a stay-at-home order was enforced. One of the sole reasons an individual could leave their home was for the purpose of daily exercise. Here, we examined how the UK national lockdown impacted access to exercise for people with blindness and visual impairment. We used a mixed methods design, collecting quantitative data from two established measures (the Exercise Barriers and Benefits Scale and the International Physical Activity Questionnaire), and qualitative data from open-ended questions. We found that, during the initial stages of the lockdown, perceived barriers to exercise increased compared to pre-pandemic levels, driven by factors, such as the closure of exercise facilities and additional difficulties posed by social distancing. Interestingly, during the later stages of the UK Coronavirus-19 response, perceived barriers decreased to lower than pre-pandemic levels. Thematic analysis indicated that this may have been due to participants finding new online methods to exercise at home, in combination with the tentative reopening of facilities.

AbstractWhen visual information is available, human adults, but not children, have been shown to reduce sensory uncertainty by taking a weighted average of sensory cues. In the absence of reliable visual information (e.g. extremely dark environment, visual disorders), the use of other information is vital. Here we ask how humans combine haptic and auditory information from childhood. In the first experiment, adults and children aged 5 to 11 years judged the relative sizes of two objects in auditory, haptic, and non‐conflicting bimodal conditions. In , different groups of adults and children were tested in non‐conflicting and conflicting bimodal conditions. In , adults reduced sensory uncertainty by integrating the cues optimally, while children did not. In , adults and children used similar weighting strategies to solve audio–haptic conflict. These results suggest that, in the absence of visual information, optimal integration of cues for discrimination of object size develops late in childhood.

Assistive technology (AT) devices are designed to help people with visual impairments (PVIs) perform activities that would otherwise be difficult or impossible. Devices specifically designed to assist PVIs by attempting to restore sight or substitute it for another sense have a very low uptake rate. This study, conducted in England, aimed to investigate why this is the case by assessing accessibility to knowledge, awareness, and satisfaction with AT in general and with sensory restoration and substitution devices in particular. From a sample of 25 PVIs, ranging from 21 to 68 years old, results showed that participants knew where to find AT information; however, health care providers were not the main source of this information. Participants reported good awareness of different ATs, and of technologies they would not use, but reported poor awareness of specific sensory substitution and restoration devices. Only three participants reported using AT, each with different devices and varying levels of satisfaction. The results from this study suggest a possible breakdown in communication between health care providers and PVIs, and dissociation between reported AT awareness and reported access to AT information. Moreover, awareness of sensory restoration and substitution devices is poor, which may explain the limited use of such technology.

AbstractIntegrating different senses to reduce sensory uncertainty and increase perceptual precision can have an important compensatory function for individuals with visual impairment and blindness. However, how visual impairment and blindness impact the development of optimal multisensory integration in the remaining senses is currently unknown. Here we first examined how audio‐haptic integration develops and changes across the life span in 92 sighted (blindfolded) individuals between 7 and 70 years of age. We used a child‐friendly task in which participants had to discriminate different object sizes by touching them and/or listening to them. We assessed whether audio‐haptic performance resulted in a reduction of perceptual uncertainty compared to auditory‐only and haptic‐only performance as predicted by maximum‐likelihood estimation model. We then compared how this ability develops in 28 children and adults with different levels of visual experience, focussing on low‐vision individuals and blind individuals that lost their sight at different ages during development. Our results show that in sighted individuals, adult‐like audio‐haptic integration develops around 13–15 years of age, and remains stable until late adulthood. While early‐blind individuals, even at the youngest ages, integrate audio‐haptic information in an optimal fashion, late‐blind individuals do not. Optimal integration in low‐vision individuals follows a similar developmental trajectory as that of sighted individuals. These findings demonstrate that visual experience is not necessary for optimal audio‐haptic integration to emerge, but that consistency of sensory information across development is key for the functional outcome of optimal multisensory integration.