scholarly journals Basic And Evolutionary Survival Effects In Adaptive Memory Of Younger And Older Adults

2021 ◽  
Author(s):  
Karen P.L. Lau
Keyword(s):  
Older Adults ◽  
Age Groups ◽  
Positive Control ◽  
Adaptive Memory ◽  
Positive Information ◽  
Age Related ◽  
Survival Scenario ◽  
Within Subjects ◽  
Memory Advantage ◽  
Survival Effect

Adaptive memory is a memory advantage for stimuli encoded in a survival scenario (e.g., stranded in grasslands) relative to a control scenario (Nairne, Thompson & Pandeirada, 2007). Basic (survival vs. non-survival scenarios) and evolutionary survival effects (high-evolutionary survival vs. low-evolutionary survival scenarios) in adaptive memory were explored in two age groups. Little research has been done with older adults. An extensive pilot study was conducted to select best matched control scenarios. Experiment 1 explored age differences in adaptive memory with a within-subjects manipulation of scenarios and found an age-equivalent basic survival effect. Experiment 2 replicated the basic survival effect in younger adults with a between-subjects design. Considering the age-related preference for processing positive information in older adults, Experiment 3 examined the survival effect with a positive control scenario. Similar results to the previous experiments were found. Overall, the data demonstrated a robust but age equivalent basic survival effect.

scholarly journals Basic And Evolutionary Survival Effects In Adaptive Memory Of Younger And Older Adults

2021 ◽  
Author(s):  
Karen P.L. Lau
Keyword(s):  
Older Adults ◽  
Age Groups ◽  
Positive Control ◽  
Adaptive Memory ◽  
Positive Information ◽  
Age Related ◽  
Survival Scenario ◽  
Within Subjects ◽  
Memory Advantage ◽  
Survival Effect

Adaptive memory is a memory advantage for stimuli encoded in a survival scenario (e.g., stranded in grasslands) relative to a control scenario (Nairne, Thompson & Pandeirada, 2007). Basic (survival vs. non-survival scenarios) and evolutionary survival effects (high-evolutionary survival vs. low-evolutionary survival scenarios) in adaptive memory were explored in two age groups. Little research has been done with older adults. An extensive pilot study was conducted to select best matched control scenarios. Experiment 1 explored age differences in adaptive memory with a within-subjects manipulation of scenarios and found an age-equivalent basic survival effect. Experiment 2 replicated the basic survival effect in younger adults with a between-subjects design. Considering the age-related preference for processing positive information in older adults, Experiment 3 examined the survival effect with a positive control scenario. Similar results to the previous experiments were found. Overall, the data demonstrated a robust but age equivalent basic survival effect.

scholarly journals The Survival Effect in Memory: Does It Hold into Old Age and Non-Ancestral Scenarios?

2021 ◽  
Author(s):  
Lixia Yang ◽  
Karen P.L. Lau ◽  
Linda Truong
Keyword(s):  
Older Adults ◽  
Old Age ◽  
Age Groups ◽  
Positive Control ◽  
Negative Control ◽  
Survival Scenario ◽  
Valence And Arousal ◽  
Encoding Strategies ◽  
Matched Comparison ◽  
Survival Effect

The survival effect in memory refers to the memory enhancement for materials encoded in reference to a survival scenario compared to those encoded in reference to a control scenario or with other encoding strategies [1]. The current study examined whether this effect is well maintained in old age by testing young (ages 18–29) and older adults (ages 65–87) on the survival effect in memory for words encoded in ancestral and/or non-ancestral modern survival scenarios relative to a non-survival control scenario. A pilot study was conducted to select the best matched comparison scenarios based on potential confounding variables, such as valence and arousal. Experiment 1 assessed the survival effect with a well-matched negative control scenario in both young and older adults. The results showed an age-equivalent survival effect across an ancestral and a non-ancestral modern survival scenario. Experiment 2 replicated the survival effect in both age groups with a positive control scenario. Taken together, the data suggest a robust survival effect that is well preserved in old age across ancestral and non-ancestral survival scenarios.

scholarly journals The Survival Effect in Memory: Does It Hold into Old Age and Non-Ancestral Scenarios?

2021 ◽  
Author(s):  
Lixia Yang ◽  
Karen P.L. Lau ◽  
Linda Truong
Keyword(s):  
Older Adults ◽  
Old Age ◽  
Age Groups ◽  
Positive Control ◽  
Negative Control ◽  
Survival Scenario ◽  
Valence And Arousal ◽  
Encoding Strategies ◽  
Matched Comparison ◽  
Survival Effect

The survival effect in memory refers to the memory enhancement for materials encoded in reference to a survival scenario compared to those encoded in reference to a control scenario or with other encoding strategies [1]. The current study examined whether this effect is well maintained in old age by testing young (ages 18–29) and older adults (ages 65–87) on the survival effect in memory for words encoded in ancestral and/or non-ancestral modern survival scenarios relative to a non-survival control scenario. A pilot study was conducted to select the best matched comparison scenarios based on potential confounding variables, such as valence and arousal. Experiment 1 assessed the survival effect with a well-matched negative control scenario in both young and older adults. The results showed an age-equivalent survival effect across an ancestral and a non-ancestral modern survival scenario. Experiment 2 replicated the survival effect in both age groups with a positive control scenario. Taken together, the data suggest a robust survival effect that is well preserved in old age across ancestral and non-ancestral survival scenarios.

scholarly journals Age Differences in the Required Coefficient of Friction During Level Walking Do Not Exist When Experimentally-Controlling Speed and Step Length

2014 ◽  
Vol 30 (4) ◽  
pp. 542-546 ◽  
Author(s):  
Dennis E. Anderson ◽  
Christopher T. Franck ◽  
Michael L. Madigan
Keyword(s):  
Older Adults ◽  
Age Differences ◽  
Coefficient Of Friction ◽  
Age Groups ◽  
Step Length ◽  
Age Difference ◽  
Age Related ◽  
Negative Effect ◽  
Independent Effects ◽  
Positive Effect

The effects of gait speed and step length on the required coefficient of friction (COF) confound the investigation of age-related differences in required COF. The goals of this study were to investigate whether age differences in required COF during self-selected gait persist when experimentally-controlling speed and step length, and to determine the independent effects of speed and step length on required COF. Ten young and 10 older healthy adults performed gait trials under five gait conditions: self-selected, slow and fast speeds without controlling step length, and slow and fast speeds while controlling step length. During self-selected gait, older adults walked with shorter step lengths and exhibited a lower required COF. Older adults also exhibited a lower required COF when walking at a controlled speed without controlling step length. When both age groups walked with the same speed and step length, no age difference in required COF was found. Thus, speed and step length can have a large influence on studies investigating age-related differences in required COF. It was also found that speed and step length have independent and opposite effects on required COF, with step length having a strong positive effect on required COF, and speed having a weaker negative effect.

scholarly journals Automated Speech Recognition Systems and Older Adults: A Literature Review and Synthesis

2019 ◽  
Vol 63 (1) ◽  
pp. 42-46 ◽  
Author(s):  
Lauren Werner ◽  
Gaojian Huang ◽  
Brandon J. Pitts
Keyword(s):  
Older Adults ◽  
Speech Recognition ◽  
Current Knowledge ◽  
Age Groups ◽  
Older Individuals ◽  
Age Related ◽  
Wide Range ◽  
Automated Speech Recognition ◽  
Technological Developments ◽  
Physical Changes

The number of older adults is growing significantly worldwide. At the same time, technological developments are rapidly evolving, and older populations are expected to interact more frequently with such sophisticated systems. Automated speech recognition (ASR) systems is an example of one technology that is increasingly present in daily life. However, age-related physical changes may alter speech production and limit the effectiveness of ASR systems for older individuals. The goal of this paper was to summarize the current knowledge on ASR systems and older adults. The PRISMA method was employed and 17 studies were compared on the basis of word error rate (WER). Overall, WER was found to be influenced by age, gender, and the number of speech samples used to train ASR systems. This work has implications for the development of future human-machine technologies that will be used by a wide range of age groups.

Changes in the Dynamic Stability of Walking in Active Healthy Older Adults Independent of Changes in Walking Speed

2008 ◽  
Author(s):  
Hyun Gu Kang ◽  
Jonathan B. Dingwell
Keyword(s):  
Older Adults ◽  
Young Adults ◽  
Dynamic Stability ◽  
Walking Speed ◽  
Age Groups ◽  
Leg Strength ◽  
Age Related ◽  
Increased Risk ◽  
Risk Of Falls ◽  
Walking Speeds

Older adults commonly walk slower, which many believe helps improve their walking stability. However, they remain at increased risk of falls. We investigated how differences in age and walking speed independently affect dynamic stability during walking, and how age-related changes in leg strength and ROM affected this relationship. Eighteen active healthy older and 17 younger adults walked on a treadmill for 5 minutes each at each of 5 speeds (80–120% of preferred). Local divergence exponents and maximum Floquet multipliers (FM) were calculated to quantify each subject’s responses to small inherent perturbations during walking. These older adults exhibited the same preferred walking speeds as the younger subjects (p = 0.860). However, these older adults still exhibited greater local divergence exponents (p<0.0001) and higher maximum FM (p<0.007) than young adults at all walking speeds. These older adults remained more unstable (p<0.04) even after adjusting for declines in both strength and ROM. In both age groups, local divergence exponents decreased at slower speeds and increased at faster speeds (p<0.0001). Maximum FM showed similar changes with speed (p<0.02). The older adults in this study were healthy enough to walk at normal speeds. However, these adults were still more unstable than the young adults, independent of walking speed. This greater instability was not explained by loss of leg strength and ROM. Slower speeds led to decreased instability in both groups.

scholarly journals ANGER, LOVE, SADNESS: DO EMOTION WORDS HAVE THE SAME SEMANTIC MEANING ACROSS AGE-GROUPS?

2019 ◽  
Vol 3 (Supplement_1) ◽  
pp. S841-S842
Author(s):  
Madeline J Nichols ◽  
Jennifer A Bellingtier ◽  
Frances Buttelmann
Keyword(s):  
Older Adults ◽  
Age Differences ◽  
Language Use ◽  
Age Groups ◽  
Past Research ◽  
Semantic Meaning ◽  
Younger Adults ◽  
Emotion Words ◽  
Emotion Word ◽  
Age Related

Abstract Every day we use emotion words to describe our experiences, but past research finds that the meanings of these words can vary. Furthermore, historical shifts in language use and experiential knowledge of the emotions may contribute to age-differences in what these emotion words convey. We examined age-related differences in the valence, arousal, and expression connoted by the words anger, love, and sadness. We predicted age-related differences in the semantic meanings of the words would emerge such that older adults would more clearly differentiate the positivity/negativity of the words, whereas younger adults would report higher endorsement for the conveyed arousal and expression. Participants included American and German older adults (N=61; mean age=68.98) and younger adults (N=77; mean age=20.77). Using the GRID instrument (Swiss Center for Affective Sciences, 2013), they rated each emotion word for its valence, arousal, and expression when used by a speaker of the participant’s native language. Across emotions and dimensions, older adults were generally more moderate in their understanding of emotion words. For example, German older adults rated anger and sadness as suggesting the speaker felt less bad and more good than the younger adults. American older adults rated love as connoting the speaker felt more bad and less good than younger adults. Arousal ratings were higher for German younger, as opposed to older, adults. Cultural differences were most pronounced for sadness such that German participants gave more moderate answers than American participants. Overall, our research suggests that there are age-related differences in the understanding of emotion words.

scholarly journals Dynapaenic obesity and its association with health outcomes in older adult populations: protocol for a systematic review

BMJ Open ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. e027728 ◽  
Author(s):  
Siobhan Leahy ◽  
Marica Cassarino ◽  
Matthew DL O' Connell ◽  
Liam Glynn ◽  
Rose Galvin
Keyword(s):  
Systematic Review ◽  
Older Adults ◽  
Health Outcomes ◽  
Older Adult ◽  
Observational Studies ◽  
Functional Disability ◽  
Age Groups ◽  
Ageing Population ◽  
Cross Sectional ◽  
Age Related

IntroductionTwo major global health challenges are the rapidly ageing population and the high prevalence of obesity in all age groups. Older adults are also susceptible to age-related loss of muscle strength, termed dynapaenia. The co-occurrence of both obesity and dynapaenia, termed dynapaenic obesity (DO), has been associated with poorer health outcomes and increased healthcare usage compared with either state alone. The purpose of this systematic review is to quantify the prevalence and incidence of DO in older adult populations, and to explore the association between DO and health outcomes, specifically chronic disease and multimorbidity, functional disability and healthcare usage.Methods and analysisUsing the Meta-analyses Of Observational Studies in Epidemiology guidelines, we will conduct a systematic review of cross-sectional and longitudinal observational studies of older adults, which include measures of DO and specified outcomes. Detailed literature searches of will be conducted using six electronic databases: Excerpta Medica dataBASE (EMBASE), PubMed, MEDLINE, SCOPUS, ScienceDirect and Cumulative Index of Nursing and Allied Health Complete (CINAHL), including articles published from database inception until Febuary 2019. The reference lists of included articles will also be searched. Two independent reviewers will undertake a three-step screening and review process using the Population, Risk Factor, Outcome framework to define eligibility. The Newcastle Ottawa Scale for non-randomised studies will be used to assess risk of bias and to rate study quality. The findings will be synthesised in a narrative summary, and a meta-analysis will be conducted where appropriate.Ethics and disseminationEthical approval is not required for this systematic review. Findings from this research will be submitted for peer-reviewed publication in academic journals, and presented at relevant academic conferences.PROSPERO registration numberCRD42018112471.

Comprehension of Explicit and Implicit Warning Information in Younger and Older Adults

2001 ◽  
Vol 45 (20) ◽  
pp. 1474-1478
Author(s):  
Holly E. Hancock ◽  
Arthur D. Fisk ◽  
Wendy A. Rogers
Keyword(s):  
Older Adults ◽  
Text Comprehension ◽  
Safety Information ◽  
Age Groups ◽  
Comprehensive Investigation ◽  
Younger Adults ◽  
Product Usage ◽  
Implicit Information ◽  
Age Related ◽  
Safe Product

Successful comprehension of warning text necessitates an ability to understand both explicitly stated safety information, as well as information about hazards and safe product usage that may be implied. Comprehension level for this type of text may vary across age groups as a function of normal age-related changes that may be experienced in memory and text comprehension in general. To date, there has been no comprehensive investigation of how well younger and older adults understand explicit and implicit information associated with actual product warnings. In the current study, 43 older and 42 younger adults read text from consumer product warnings and then rated the truth/falsity of statements containing information that was either explicitly stated or implied by the warnings. The results suggest both older and younger adults are able to recognize information that is explicitly associated with an actual product warning. However, they are less able to recognize information that can be inferred from warnings. These data also suggest that older adults perceive themselves to understand consumer warnings fairly well.

scholarly journals Age-Related Changes in the 25-Hydroxyvitamin D Versus Parathyroid Hormone Relationship Suggest a Different Reason Why Older Adults Require More Vitamin D

2003 ◽  
Vol 88 (1) ◽  
pp. 185-191 ◽  
Author(s):  
Reinhold Vieth ◽  
Yasmin Ladak ◽  
Paul G. Walfish
Keyword(s):  
Older Adults ◽  
Vitamin D ◽  
Secondary Hyperparathyroidism ◽  
Age Groups ◽  
The Elderly ◽  
Age Group ◽  
Hydroxyvitamin D ◽  
Age Related ◽  
25 Hydroxyvitamin D ◽  
The Relationship

Vitamin D requirements are thought to vary with age, but there is little comparative evidence for this. One goal in establishing a vitamin D requirement is to avoid secondary hyperparathyroidism. We studied 1741 euthyroid, thyroid clinic outpatients without evidence of calcium abnormalities, ranging in age from 19 to 97 yr, whose serum and urine had been analyzed for calcium, vitamin D, and parathyroid status. We found no effect of age on the 25-hydroxyvitamin D [25(OH)D] concentration associated with specific vitamin D intakes, and there was no relationship between 25(OH)D and 1,25hydroxyvitamin D [1,25(OH)2D]. In every age group, serum 1,25(OH)2D declined with increasing creatinine (P < 0.001). What changed with age included creatinine, which correlated with 25(OH)D (r = 0.146, P < 0.001) only in the youngest age group (19–50 yr) but not in the older age groups (P > 0.1). Creatinine did not correlate with PTH in the youngest age group, but the relationship became significant as age increased (e.g. for the elderly, r = 0.365, P < 0.001). Linear regression of log PTH vs. log 25(OH)D agreed with the natural shape of the relationship observed with scatterplot smoothing, and this showed no plateau in PTH as 25(OH)D increased. We compared PTH concentrations among age groups, based on 20 nmol/liter increments in 25(OH)D. Mean PTH in adults older than 70 yr was consistently higher than in adults younger than 50 yr (P < 0.05 by ANOVA and Dunnett’s t test). PTH levels of the elderly who had 25(OH)D concentrations greater than 100 nmol/liter matched PTH of younger adults having 25(OH)D concentrations near 70 nmol/liter. This study shows that all age groups exhibit a high prevalence of 25(OH)D insufficiency and secondary hyperparathyroidism. Older adults are just as efficient in maintaining 25(OH)D, but they need more vitamin D to produce the higher 25(OH)D concentrations required to overcome the hyperparathyroidism associated with their diminishing renal function.

Sign in / Sign up

Export Citation Format

Share Document