Information support robots (ISRs) have the potential to assist older people living alone to have an independent life. However, the effects of ISRs on the daily activity, especially the sleep patterns, of older people have not been clarified; moreover, it is unclear whether the effects of ISRs depend on the levels of cognitive function. To investigate these effects, we introduced an ISR into the actual living environment and then quantified induced changes according to the levels of cognitive function. Older people who maintained their cognitive function demonstrated the following behavioral changes after using the ISR: faster wake-up times, reduced sleep duration, and increased amount of activity in the daytime (p < 0.05, r = 0.77; p < 0.05, r = 0.89, and p < 0.1, r = 0.70, respectively). The results suggest that the ISR is beneficial in supporting the independence of older people living alone since living alone is associated with disturbed sleep patterns and low physical activity. The impact of the ISR on daily activity was more remarkable in the subjects with high cognitive function than in those with low cognitive function. These findings suggest that cognitive function is useful information in the ISR adaptation process. The present study has more solid external validity than that of a controlled environment study since it was done in a personal residential space.

Objective/background: Agitation is a common behaviour of Alzheimer’s Disease (AD). Although healing robots have previously been used for alleviating agitation for people with dementia in hospitals and other healthcare facilities, its effects remain unclear whether an information-support robot capable of disseminating information with user needs may have similar effects when it is applied in community dwellings. This study was to investigate the effects of information-support robots for reducing agitation in older people with AD residing alone in community-dwellings. Methods: One participant with AD who lived alone in a community-dwelling was recruited. Participant’s frequencies, durations, and time courses of four patterns of agitation at home at baseline and during intervention were analysed. In this study, agitation was defined as: (a) restlessness going to the corridor (RLtoC), (b) restlessness going to the toilet (RLtoT), (c) restlessness going to the entrance (RLtoE), and (d) restlessness going to multiple places (RLtoMP). In the intervention phase, the information-support robot disseminated daily schedule or date information to the participant. Results: RLtoC and RLtoMP were significantly reduced in frequency during the intervention. The durations of each episode of RLtoT and RLtoMP in the intervention were slightly reduced than those at the baseline. There were no differences in time courses of episodes of RLtoC and RLtoMP after the intervention. Conclusion: This case study showed that information-support robot was useful to alleviate agitation of an older adult with AD living alone in a community-dwelling. Further study is warranted.

Purpose: This study aimed to investigate the provision and need for assistive products for older adults with cognitive impairment among rehabilitation therapists, identify any unmet needs, and analyze current issues in providing such products.Methods: We conducted a questionnaire survey with rehabilitation therapists involved in selecting and providing assistive products for cognitive function in older adults with cognitive impairments. Questionnaires comprising ten items about the experience and need for cognitive assistive products were sent to 300 facilities for older adults in Japan between January and February 2021. One hundred thirty-five responses were received.Results: The mean age of the participants was 39.5 ± SD7.1. There were 70 females, 64 males, and one unanswered questionnaire. In total, 72 (53.3%) of the 135 therapists had introduced or provided assistive products to their patients. The most frequently provided products were for safety and security; some were provided to support memory and orientation. 86% of therapists did not use the insurance system to provide them. The survey showed that most participants with experience providing assistive products needed information on the available resources.Conclusions: Although the need for assistive products for cognition is increasing, they are not sufficiently supplied in caring for older adults with cognitive impairment. Their availability differed depending on the assistive product type. It is necessary to have an effective social insurance system and access to up-to-date information to provide appropriate assistive products.

Humans flexibly allocate attention depending on the given context. The dominant view posits that attention is guided by spatial and temporal sensory contextual cues that directly specify the target location. In real-world scenarios, however, such contextual cues are not always accessible, posing a problem for identifying the current context. Here, using a visual search paradigm combined with eye movement measurement, we show that humans also rely on the history of the previous context to infer the most probable context for guiding attention proactively. Participants searched for a visual target among the distractors. On one side of the display, targets were consistently associated with a particular fixed distractor configuration (Repeated condition), while on the other side, targets appeared with non-repeated, novel configurations (Novel condition). The Repeated condition represented a highly probable context, while the Novel condition represented rare contexts. Regardless of the current condition, participants’ initial saccade was biased toward the target direction of the Repeated condition, showing attentional guidance toward the location indicated by the most encountered context. Importantly, this attentional bias already existed before the onset of the search display, indicating the proactive use of contextual history to guide attention. We confirm that the probability of the target location or the movement parameters to report the target could not explain this context-history bias. Our study shows that, together with the sensory cue-based context detection mechanism, the context-history is also proactively used to robustly guide attention in the yet-unknown forthcoming context.

This study aimed to elucidate the effect of introducing an information support robot on utterance frequency and confirm the change in utterance frequency after long-term use. We presented an information support robot installed with individualized content to three older adults with cognitive impairment who live alone at home or in an assisted living residence (mean age 83.7±SD 5.4 years). Changes in the participants' utterance frequency over six months following the intervention of long-term robot use in actual living spaces were quantitatively recorded and analyzed. Two participants' total utterance frequency maintained or improved. With robot intervention, the utterance frequency to the robot was maintained for six months. When the usability and satisfaction with the robot were high, the utterance frequency increased. These results suggest that users need to be provided with personalized information that is appropriate for their individual needs to use robots effectively over the long term. Information support robots have the potential for long-term use without inflicting boredom and may encourage more frequent interactions. Long-term use of such information support robots may help older adults to continue living autonomously and independently for longer. These findings may contribute to future efforts in supporting autonomous living.