Identifying perception behaviours in people with profound intellectual and multiple disabilities

Odor hedonic responses in children and young people with profound intellectual and multiple disabilities

Introduction

Odors are closely linked to emotions, play an important role in the well-being of individuals and can influence mood. Despite these crucial properties, the hedonic responses to odors of people with profound intellectual and multiple disabilities (PIMD) remain little explored.

Aim

This within-subjects study aims to examine whether children and young people with PIMD react in a differentiated way to odors evaluated as pleasant or unpleasant by neurotypical adults and, if so, with which behaviors. The influence of their global mood on their emotional responses to odors is also examined.

Method

Twenty children and young people (7-18 years old) with PIMD were exposed to four pairs of hedonically contrasted odors. A control stimulus was presented before each odorant. Five emotional responses, one physiological reaction (nausea reactions), and three responses reflecting approach toward or avoidance of the stimulus were recorded throughout the duration of the stimulus exposure. The participants' global mood status was measured before the start of the research with the French version of the Mood, Interest and Pleasure Questionnaire (Ross and Oliver, 2003).

Results

The results show that when exposed to pleasant odorants, participants kept their heads aligned with the odorant source longer, smiled longer, and produced more positive vocalizations. In contrast, unpleasant odorants elicit more pouts and grimaces. Nausea reactions occurred in the presence of unpleasant odorants. The hedonic responses were more marked during the second presentation of the stimuli. Participants with a higher MIPQ score showed significantly more emotional reactions to odors.

Conclusion

The results confirm the presence of olfactory preferences in participants with PIMD and the existence of a link between their mood, emotions and olfactory hedonic processing. They prompt the use of odors to support not only the cognitive development of this population, but also their mood and their emotional regulation abilities.

Characterizing eye-gaze positions of people with severe motor dysfunction: Novel scoring metrics using eye-tracking and video analysis

Nonverbal communication with people who have physical disabilities is difficult. Eye-tracking technologies have recently been developed and applied to help people with physical disabilities in their communication. However, the eye-gaze patterns of people with severe motor dysfunction (SMD) have not been analyzed in detail. To clarify characterization of people with SMD, we aimed to develop gaze position-based evaluation metrics and analyze detailed eye-gaze patterns of people with SMD. We developed two new scoring metrics: (1) saliency score based on three saliency maps—spectral residual (SR), fine grained (FG), and motion (Mo); and (2) the distance score, which represents to what extent people can chase an object in a video. The evaluation was performed on 102 participants, consisting of 35 subjects with profound intellectual and multiple disabilities (PIMD; SMD with IQ < 20), 19 with severe physical disabilities (SPD; SMD with IQ ≥ 20), and 48 healthy individuals. We observed that two saliency scores (SR and FG) and the distance score showed significant differences between the PIMD/SPD and healthy groups for the entire video, whereas Mo scores did not. Moreover, the distance score was analyzed separately for each scene, where scenes were categorized into three patterns—running, explanation, and hiding—according to the behavior of the moving objects. In the SPD and healthy groups, the explanation scenes accounted for the highest percentage of all scenes with the best distance score (63.6% and 61.9%, respectively), whereas in the PIMD group, the running scenes accounted for the highest percentage (54.5%). In conclusion, the new metrics were successful in quantitatively assessing the gaze responsiveness of people with SMD, which could not be assessed using a conventional metric, gaze-acquisition time. This study is expected to expand the possibilities of nonverbal communication using eye-tracking devices for people with SMD.

Odour detection in children and young people with profound intellectual and multiple disabilities

BACKGROUND

Olfaction provides information on very important dimensions of the environment; however the olfactory abilities of children and young people with profound intellectual and multiple disabilities (PIMD) remain largely unknown. This within-subjects study explores olfactory detection abilities in children with PIMD.

METHOD

Twenty-two children and young people with PIMD (7-18 years) were presented with 18 medium intensity odours and an odourless control stimulus. Odorants were presented one by one in a randomised order. The neutral stimulus was presented prior to each odorant. Participants' responses were measured using 21 behavioural indicators.

RESULTS

Results show that participants make a clear distinction between odorous and neutral conditions, between food and non-food, and between pleasant and unpleasant odours. The detection abilities are manifested by several behaviours, in particular by the duration of the head alignment on the odorant.

CONCLUSIONS

This study shows that participants detect the stimuli and act differently depending on the category.

Witnessing Quality of Life of Persons with Profound Intellectual and Multiple Disabilities. A practical-Philosophical Approach

Persons with profound intellectual and multiple disabilities (PIMD) cannot speak about their Quality of Life (QoL), which makes it necessary to involve others. In current approaches, these 'others' are seen as assessors trying to describe QoL as objectively as possible, which involves a reduction of their experiences, through which they develop knowledge on the QoL of the person with PIMD. The objective of this paper is to give caregivers' knowledge on the QoL of a person with PIMD a theoretical basis that values these experiences. We will argue that caregivers should be seen as witnesses, not assessors, and their statements on QoL as testimonies, not assessments. Audiences judge the trustworthiness of these witnesses intersubjectively, which implies a relationship characterized by trust and suspicion. Trust supports the witness to tell in her own words about the QoL of the person with PIMD; it demands receptivity, indicating that both the witness and the audience are willing to reconsider their perspective on QoL. Suspicion is necessary too, which helps the witness to critically approach her own interpretations and supports her to create more trustworthy testimonies. We conclude that the concept of witnessing helps to acknowledge caregivers' experiential knowledge of QoL of a person with PIMD, which may also apply to other persons who cannot speak about their own QoL. We hope that our study will empower caregivers to give testimonies on QoL of a person with PIMD, which is crucial when complex decisions about the life of this person have to be made.