During the fourth age, a marked physiological deterioration and critical points of dysfunction are observed, during which cognitive performance exhibits a marked decline in certain skills (fluid intelligence) but good performance of others (crystallized intelligence). Experimental evidence describes important constraints on word production during old age, accompanied by a relative stabilization of speech comprehension. However, cognitive changes associated with advanced aging could also affect comprehension, particularly word recognition. The present study examines how the visual recognition of words is affected during the fourth age when tasks involving different cognitive loads are applied. Through linear regression models, performance was compared between two third-age groups and a fourth-age group on reaction time (RT) and accuracy in naming, priming and lexical decision experiments. The fourth-age group showed a significant RT increase in all experiments. In contrast, accuracy was good when the task involved a low cognitive demand (Experiments 1 and 2); however, when a decisional cognitive factor was included (Experiment 3), the fourth-age group performed significantly worse than the younger third-age group. We argue that the behavior observed among fourth-age individuals is consistent with an unbalanced cognitive configuration, in which the fluid intelligence deficit significantly reduces the speed necessary to recognize words, independent of the cognitive load associated with the test. In contrast, the maintenance in crystallized intelligence improves the accuracy of the process, strengthening linguistic functionality in the advanced stages of old age.

Older adults in the third-age group (60–79 years) maintain reading comprehension skills similar to those of younger adults, but little is known about individuals in the fourth age (80+ years). This study investigates differences in reading comprehension in a between-group design. We evaluated a sample of 150 older adults, comprising 86 third-age and 64 fourth-age participants. We examined the influence of sex, cognitive functioning, formal education, self-perceived reading difficulties, and reading habits on their text comprehension abilities. The results show that fourth-age adults have a significant decline in reading comprehension compared to third-age adults. Strong reading habits were positively associated with better comprehension across both groups, suggesting that regular reading may buffer against age-related cognitive decline. Poor readers read less frequently and perceived greater difficulty with the tasks. Cognitive functioning and education did not significantly influence comprehension—possibly due to the generally low education levels in the sample. However, strong reading habits appeared to compensate for these limitations. These findings suggest a potential protective role of lifelong reading habits and highlight the need for interventions to support reading skills in older adults, especially those with lower educational backgrounds. Future research should explore these dynamics further to enhance cognitive resilience in the oldest populations.

Although there is evidence that recognizing pseudowords is more difficult than recognizing words during childhood, adulthood, and early old age (60–75 years), it is not yet clear what happens during advanced aging or the fourth age, a stage when the decline of fluid intelligence strongly affects processing speed, but a good performance of crystallized intelligence is described through an increase in vocabulary and knowledge. The objective of this study was to determine the lexicality effect in advanced aging, specifically exploring how the ability to recognize words and pseudowords (ortho-phonologically plausible for Spanish) is affected during the third and fourth-ages. The lexicality effect was measured using naming and lexical decision tasks. Response time and accuracy were compared between a fourth-age group (80+ years) and two third-age groups (60–69 and 70–79 years) through linear regression models. The results showed that, in general, the fourth-age group had longer response times and reduced accuracy when recognizing words and pseudowords. Moreover, they showed a significant lexicality effect (which increases from the third- age onwards), reflected in higher costs during pseudoword recognition, especially when the task required more cognitive effort (lexical decision task). These results were consistent with the impact of the deterioration of fluid intelligence on the speed of lexical recognition and with the better performance that crystallized intelligence can generate on accuracy, especially in the early stages of old age. Additionally, this study supports the fact that pseudoword recognition resists cognitive decline, as accentuated deterioration is visualized only after 80 years.

Background: During the fourth age (80+ years), cognitive difficulties increase. Although language seems to resist the advancement of age, an older person without pathological developments in cognition may exhibit deficits in lexical access. This study examines the restrictions on lexical access in people aged 80 and older in word recognition and retrieval modalities through four lexical tasks. Method: The effect of aging on response time and accuracy was measured using recognition (lexical decision/naming/priming) and retrieval (picture naming) tasks. A fourth age group (>80) and two third age groups (60–69/70–79) were compared according to lexical access modality and type of task employed through linear regression models. Results: People aged 80 and older exhibit a strong lexical access constraint, as they are slower and less accurate in recognizing and retrieving words than both third age groups. These restrictions are more profound for the word retrieval modality, especially in the picture naming task. Conclusion: Impaired fluid intelligence and internode transmission deficits during advanced aging could further reduce the ability to recognize and/or retrieve words, having an impact on access speed and accuracy. Furthermore, the idea that crystallized intelligence could strengthen the accuracy of lexical access during aging is supported, specifically in word recognition modality.

Introduction: although there is consensus that physical activity plays a fundamental role in successful aging, it is necessary to investigate the real impact it has on the brain. Aim: the aim of this study is to identify the effects of physical activity on healthy brain aging by analyzing the structural and/or functional changes it may generate in the brain. In addition, we aim to determine whether regular participation in physical activity throughout life is a predictor of healthy brain aging. Methods: a systematic review was conducted in three databases: Web of Science, Scopus and PubMed, following PRISMA-P guidelines. Articles published between 2010 and 2023 were included. Experimental, quasi-experimental, clinical trials and cohort studies were considered. Results: a total of 63 articles were identified, of which 17 were included in the analysis. Of these, 14 reported significant effects of physical activity on healthy brain aging, of which 11 evidenced structural, 2 functional, and 1 mixed benefits. In addition, 13 articles demonstrated that participating in physical activity across the lifespan supports cognitive aging. Conclusions: engaging in physical activity throughout life leads to structural and/or functional benefits in the brain during old age, which are related to better cognitive performance. Furthermore, it is suggested that regular participation in physical activity may be a predictor of healthy brain aging. However, controversy persists as to the type, duration and intensity of physical activity that meets the conditions necessary to promote optimal cognitive aging and that can be used as a standard measure for the promotion of healthy brain aging

This pilot study investigates the relationship between stress situations and speech fluency in virtual reality environments. It aims to analyze how different stress scenarios, classified into low-, medium-, and high-stress environments, can affect speech rate, increase syllable/word repetitions, and lead to hesitations in university students. Previous research has established connections between stress situations and speech fluency, highlighting that stress can negatively influence behavior, cognitive processes, and communicative performance across various contexts, including oral presentations. An experiment was conducted with 30 participants randomly divided into three groups. Each group was exposed to different virtual stress environments (low/medium/high) during simulated oral presentations. A virtual reality platform was created to establish controlled environments and monitor the participants’ fluency in real time. An Analysis of Variance (ANOVA) test revealed that participants in the low-stress virtual environment performed better, achieving higher word and syllable production. In contrast, the high-stress virtual environment demonstrated an increase in disfluencies and hesitations. Results emphasize the impact of stress situations on oral communication, advocating for the use of virtual reality technology as a means of preparing individuals for challenging speaking scenarios. This approach has the potential to enhance speech fluency as a result of targeted practice in stress-inducing environments; that is to say, alleviating anxiety and improving overall communicative efficacy.