scholarly journals Effects of practice on visuo-spatial attention in a wayfinding task

2021 ◽  
Author(s):  
Mai Geisen ◽  
Kyungwan Kim ◽  
Stefanie Klatt ◽  
Otmar Bock
Keyword(s):  
Decision Making ◽  
Spatial Attention ◽  
Older Persons ◽  
Recall Test ◽  
Age Groups ◽  
Attentional Focus ◽  
Gaze Direction ◽  
Fixation Time ◽  
Dynamic Changes ◽  
Virtual City

AbstractSeveral studies have evaluated the distribution of visuo-spatial attention in a wayfinding task, using gaze direction as an indicator for the locus of attention. We extended that work by evaluating how visuo-spatial attention is modified by wayfinding practice. Young and older participants followed prescribed routes through a virtual city on six trials. Each trial was followed by a route recall test, where participants saw screenshots of intersections encountered, and had to indicate which way to proceed. Behavioral and gaze data were registered in those tests. Wayfinding accuracy increased from trial to trial, more so in young than in older persons. Total gaze time, mean fixation time, and the vertical scatter of fixations decreased from trial to trial, similarly in young and older persons. The horizontal scatter of fixations did not differ between trials and age groups. The incidence of fixations on the subsequently chosen side also did not differ between trials, but it increased in older age. We interpret these findings as evidence that as wayfinding practice increased, participants gradually narrowed their attentional focus to the most relevant screenshot area, processed information within this focus more efficiently, reduced the total time in which attention dwelled on the rejected side of the screenshot, but maintained the total time on the chosen side. These dynamic changes of visuo-spatial attention were comparable in young and older participants. However, it appears that decision-making differed between age groups: older persons’ attention dwelled longer on the chosen side before they made their choice.

scholarly journals Reduced immune-regulatory molecule expression on human colonic memory CD4 T cells in older adults

2021 ◽  
Vol 18 (1) ◽  
Author(s):  
Stephanie M. Dillon ◽  
Tezha A. Thompson ◽  
Allison J. Christians ◽  
Martin D. McCarter ◽  
Cara C. Wilson
Keyword(s):  
T Cells ◽  
T Cell ◽  
Cd8 T Cells ◽  
Cd4 T Cells ◽  
Older Persons ◽  
Age Groups ◽  
T Cell Immunity ◽  
Cd4 T Cell ◽  
Cell Immunity ◽  
Memory Cd4 T Cells

Abstract Background The etiology of the low-level chronic inflammatory state associated with aging is likely multifactorial, but a number of animal and human studies have implicated a functional decline of the gastrointestinal immune system as a potential driver. Gut tissue-resident memory T cells play critical roles in mediating protective immunity and in maintaining gut homeostasis, yet few studies have investigated the effect of aging on human gut T cell immunity. To determine if aging impacted CD4 T cell immunity in the human large intestine, we utilized multi-color flow cytometry to measure colonic lamina propria (LP) CD4 T cell frequencies and immune-modulatory marker expression in younger (mean ± SEM: 38 ± 1.5 yrs) and older (77 ± 1.6 yrs) adults. To determine cellular specificity, we evaluated colon LP CD8 T cell frequency and phenotype in the same donors. To probe tissue specificity, we evaluated the same panel of markers in peripheral blood (PB) CD4 T cells in a separate cohort of similarly aged persons. Results Frequencies of colonic CD4 T cells as a fraction of total LP mononuclear cells were higher in older persons whereas absolute numbers of colonic LP CD4 T cells per gram of tissue were similar in both age groups. LP CD4 T cells from older versus younger persons exhibited reduced CTLA-4, PD-1 and Ki67 expression. Levels of Bcl-2, CD57, CD25 and percentages of activated CD38+HLA-DR+ CD4 T cells were similar in both age groups. In memory PB CD4 T cells, older age was only associated with increased CD57 expression. Significant age effects for LP CD8 T cells were only observed for CTLA-4 expression, with lower levels of expression observed on cells from older adults. Conclusions Greater age was associated with reduced expression of the co-inhibitory receptors CTLA-4 and PD-1 on LP CD4 T cells. Colonic LP CD8 T cells from older persons also displayed reduced CTLA-4 expression. These age-associated profiles were not observed in older PB memory CD4 T cells. The decline in co-inhibitory receptor expression on colonic LP T cells may contribute to local and systemic inflammation via a reduced ability to limit ongoing T cell responses to enteric microbial challenge.

scholarly journals Validation of a French Version of the Career Decision-Making Difficulties Questionnaire: Relationships With Self-Esteem and Self-Efficacy

2021 ◽  
pp. 089484532110099
Author(s):  
Jérôme Rossier ◽  
Shékina Rochat ◽  
Laurent Sovet ◽  
Jean-Luc Bernaud
Keyword(s):  
Decision Making ◽  
Career Counseling ◽  
Self Efficacy ◽  
Age Groups ◽  
Career Decision ◽  
Self Esteem ◽  
Career Decision Making ◽  
Student Sample ◽  
French Version ◽  
The Relationship

The aim of this study was to validate the French version of the Career Decision-Making Difficulties Questionnaire (CDDQ) and to assess its measurement invariance across gender, age groups, countries, and student versus career counseling samples. We also examined the sensitivity of this instrument to discriminate a career counseling population from a general student sample. Third, we studied the relationship between career decision-making difficulties, career decision-making self-efficacy, and self-esteem in a sample of 1,748 French and French-speaking Swiss participants. A confirmatory factor analysis confirmed the overall hierarchical structure of the CDDQ. Multigroup analysis indicated that the level of invariance across groups almost always reached configural, metric, and scalar invariance. Differences between countries were very small, whereas differences between the general population and career counseling subsamples were much larger. Both self-esteem and self-efficacy significantly predicted career decision-making difficulties. Moreover, as expected, self-efficacy partially mediated the relationship between self-esteem and career decision-making difficulties.

scholarly journals Drivers’ Age and Automated Vehicle Explanations

2021 ◽  
Vol 13 (4) ◽  
pp. 1948
Author(s):  
Qiaoning Zhang ◽  
Xi Jessie Yang ◽  
Lionel P. Robert
Keyword(s):  
Decision Making ◽  
Middle Age ◽  
Age Groups ◽  
Design Experiment ◽  
Mixed Design ◽  
Automated Vehicles ◽  
Automated Vehicle ◽  
Automated Decision Making

Automated vehicles (AV) have the potential to benefit our society. Providing explanations is one approach to facilitating AV trust by decreasing uncertainty about automated decision-making. However, it is not clear whether explanations are equally beneficial for drivers across age groups in terms of trust and anxiety. To examine this, we conducted a mixed-design experiment with 40 participants divided into three age groups (i.e., younger, middle-age, and older). Participants were presented with: (1) no explanation, or (2) explanation given before or (3) after the AV took action, or (4) explanation along with a request for permission to take action. Results highlight both commonalities and differences between age groups. These results have important implications in designing AV explanations and promoting trust.

scholarly journals Eye Placement Bias Is Remarkably Robust

i-Perception ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 204166952110175
Author(s):  
Kirsten Smith ◽  
Vera Kempe ◽  
Lara Wood
Keyword(s):  
Decision Making ◽  
Motor Skill ◽  
Age Groups ◽  
Systematic Bias ◽  
Decision Making Processes ◽  
Drawing Ability ◽  
Potential Confound

When drawing faces, people show a systematic bias of placing the eyes higher up the head than they are placed in reality. This study investigated the development of this phenomenon while removing the potential confound of drawing ability. Participants ( N = 124) in three age groups (3–5 yo, 10–11 yo, and adults) reconstructed two foam faces: one from observation and one from memory. The high eye placement bias was remarkably robust with mean eye placement in every condition significantly higher than the original faces. The same bias was not shown for mouth placement. Eye placement was highest for the youngest participants and for the memory conditions. The results suggest that an eye placement bias is not caused by the motor skill demands required for drawing and lend evidence to the suggestion that an eye placement bias is caused by perceptual and decision-making processes.

Sex-Role Specialization in a Transforming Market: Empirical Evidence from Vietnamese Middle-Class Households

2011 ◽  
Vol 32 (1) ◽  
pp. 61-73 ◽  
Author(s):  
Elfriede Penz ◽  
Erich Kirchler
Keyword(s):  
Decision Making ◽  
Middle Class ◽  
Sex Role ◽  
Age Groups ◽  
Household Consumption ◽  
Household Decision ◽  
Role Changes ◽  
Consumption Decisions ◽  
Middle Class Families ◽  
Role Specialization

Vietnam is undergoing a rapid transformation to a more prosperous society. This article analyzes household decision making in a transforming economy that has undergone modification of the traditional view of the family, from being an autonomous unit to an object of state policy. This is relevant because policy interventions shape household consumption through gender equality programs and thus have an impact on sex-role specialization. The aim of this study is to advance understanding of Vietnamese household consumption decisions and spouses’ current influence patterns by investigating sex-role specialization in Vietnamese middle-class families’ decision making. Overall, no significant sex-role changes were observed. It seems that traditional Vietnamese sex-role specialization does not (yet) differ among age groups. Instead, traditional sex-role segmentation remains predominant across all investigated age groups. While economic and consumption habits change rapidly, middle-class families appear to preserve their traditional influence patterns in purchase decisions.

Physical Performance Measures for Characterizing High Functioning Older Persons

1996 ◽  
Vol 4 (4) ◽  
pp. 338-348 ◽  
Author(s):  
Takashi Kinugasa ◽  
Hiroshi Nagasaki ◽  
Taketo Furuna ◽  
Hajime Itoh
Keyword(s):  
Older Adults ◽  
Physical Performance ◽  
Performance Measures ◽  
Older Persons ◽  
Discriminant Validity ◽  
Age Groups ◽  
High Functioning ◽  
Eyes Open ◽  
Interdisciplinary Study ◽  
Tokyo Metropolitan Institute

The goal of this study was to identify methods for characterizing high-functioning older adults living in the community. The subjects were 495 older adults from the Longitudinal Interdisciplinary Study on Aging conducted by the Tokyo Metropolitan Institute of Gerontology. Physical performance measures included grip strength, walking at preferred and maximum speeds, one-leg standing with eyes open, and finger tapping rate. Performance scores were created by summing each categorical score. Consistent differences were found among age groups and genders. Scores were lower in subjects who had stroke or diabetes than in those without these conditions. These results suggest that physical performance measures have both discriminant validity and construct validity, which make them useful methods for characterizing high-functioning older persons.

FEATURES OF THE COEFFICIENT OF VARIATION OF HEMATOLOGICAL INDICATORS IN PERSONS OF MIDDLE, ELDERLY AND SENILE AGE WITH PNEUMONIA

2021 ◽  
pp. 102-106
Author(s):  
С. А. Рукавишникова ◽  
Т. А. Ахмедов ◽  
А.С. Пушкин ◽  
У.Р. Сагинбаев ◽  
Д.П. Пискунов ◽  
...  
Keyword(s):  
Retrospective Study ◽  
Older Persons ◽  
Risk Group ◽  
Age Groups ◽  
Biological Variation ◽  
The Body ◽  
Blood Analysis ◽  
Internal Environment ◽  
Severity Of The Disease ◽  
Hematological Indicators

Пневмония занимает лидирующие позиции по смертности среди всех инфекционных заболеваний. Установлено, что к достоверной группе риска по уровню заболеваемости и смертности от данной нозологической формы относятся лица старше 60 лет, причем с возрастом тяжесть протекания заболевания только возрастает. Согласно литературным данным, одной из причин снижения адаптационных возможностей лиц пожилого возраста является феномен «возрастного десинхроноза», проявляющийся значительными колебаниями параметров внутренней среды организма. Цель работы - сравнительный анализ коэффициентов внутри-и межиндивидуальной биологической вариации. Для этого проведено ретроспективное исследование клинического анализа крови у пациентов, страдающих пневмонией неуточненной этиологии, в разрезе трех возрастных групп - средней, пожилой и старческой. Обнаружены особенности биологической вариации в зависимости от возраста, выявленные отличия были обоснованы в соответствии с имеющимися теориями. Pneumonia is the leading mortality rate among all infectious diseases. It has been established that the reliable risk group for morbidity and mortality from this nosology includes persons over 60 years of age, and with age the severity of the disease only increases. According to literary data, one of the reasons for the decline in adaptation capabilities of older persons is the phenomenon of «age desinhronosis», which manifests itself in significant fluctuations in the parameters of the internal environment of the body. The purpose of this work was to compare the coefficients of intra- and interindividual biological variation. For this purpose, a retrospective study of clinical blood analysis in patients suffering from pneumonia of unspecified etiology was carried out in terms of three age groups: medium, elderly and senile. Features of biological variation depending on age have been found, the differences identified have been justified according to available theories.

Wandering Eyes: Using Gaze-Tracking Method to Capture Eye Fixations in Unfamiliar Healthcare Environments

2021 ◽  
pp. 193758672110423
Author(s):  
Hessam Ghamari ◽  
Nasrin Golshany
Keyword(s):  
Human Subjects ◽  
Age Groups ◽  
Healthcare Setting ◽  
Fixation Time ◽  
Gaze Tracking ◽  
Healthcare Facilities ◽  
Eye Fixations ◽  
Environmental Attributes ◽  
Architectural Features ◽  
Healthcare Environments

Objective: This study aims to investigate the elements of wayfinding in indoor complex healthcare environments. Background: The study replicates Ghamari and Pati’s 2018 study to identify the environmental attributes that attract eye fixation during wayfinding by objectively tracking eye movements and fixation as healthy subjects navigate through a complex, unfamiliar indoor healthcare setting. The study addressed what do people look at while navigating in unfamiliar healthcare environments? What are the relative time periods of eye fixations on different visual environmental elements of the healthcare-designed environments? And what role do visual environmental attributes in healthcare facilities, such as configuration, color, art, directories, maps, furniture, and so on, play during the wayfinding process. Method: Twenty-four adults in different genders and various age groups participated in this study and navigated five routes with different degrees of difficulty. The sequence of the destinations in this study was randomized. The data were collected by tracking gaze fixations while human subjects navigated an indoor complex healthcare environment. Results: The findings show that identifying signs (29.1%), informative signs (20.8%), and architectural features (11.3%) constituted the most frequent elements attracting gaze, substantially more than the other classes of information. Four types of signage (identifying signs, informative signs, directional, and safety/regulatory signs) were accounted for 62.3% of the total gaze fixation time. Conclusions: The comparison of the ordered list based on frequencies and time of eye fixations on various elements developed in Ghamari and Pati’s study shows a vast degree of similarities.

scholarly journals Prevalence of eczema among older persons: A population-based cross-sectional study

2021 ◽  
Vol 0 ◽  
pp. 1-5
Author(s):  
Vijayan Neena ◽  
Neelakandhan Asokan ◽  
Rajany Jose ◽  
A. Sarin
Keyword(s):  
Older Persons ◽  
Health Workers ◽  
Age Groups ◽  
Medical Knowledge ◽  
Population Based ◽  
Cross Sectional Survey ◽  
Community Based Interventions ◽  
Community Based ◽  
Cross Sectional ◽  
Lichen Simplex Chronicus

Background: There are very few population-based studies on the prevalence of eczema among older persons Aims: To estimate the prevalence and types of eczema in those aged 65 years or more in the community and to evaluate the effectiveness of community-based interventions for case finding. Methods: In the first stage of this cross-sectional survey, trained health workers of a non-governmental organization surveyed the eligible population and identified persons likely to have eczema. In the second stage, dermatologists examined such persons to ascertain the diagnosis. Statistical analysis was done using Epi Info software version 7. Prevalence of eczema was expressed in percentages. Chi-square test was used for comparing the difference in prevalence of eczema in various age groups and sex. Results: Health workers identified 98 persons as possible cases of eczema after interviewing 385 older persons in the community. Among them 95 persons were examined by dermatologists and 44 were confirmed to have eczema (diagnostic accuracy of health workers = 46.3%).Point prevalence of eczema was 11.4% (44/385). Prevalence was similar in males and females. It was greater (18.2 %) among persons aged 81 years or more. Asteatotic eczema, gravitational eczema and lichen simplex chronicus were the more common types of eczema. Limitations: Possible underestimation of the prevalence rates due to limited medical knowledge of health workers; limited facilities for examination and investigations at the medical camps and home visits. Conclusion: There appears to be a considerable burden of eczema among older persons in the community. A community-based approach involving non-governmental organizations has the potential to identify cases and offer care close to their homes.

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