Ko and Neuberg's ecological affordance framework, which links environmental threats to life-stage and sex-specific goals, can be extended to older adults who may display different patterns of between-sex variation in affordances posed by physical violence, pathogen prevalence, and sex-age ratio.
Key Findings
Background
The ecological affordance framework proposed by Ko and Neuberg can be extended beyond the life stages discussed in the target article to encompass late adulthood.
The commentary argues that older adults represent a distinct life stage with unique ecological affordance patterns.
The extension focuses on three ecological factors: physical violence, pathogen prevalence, and sex-age ratio.
The authors propose that between-sex variation in responses to these ecological factors differs in late adulthood compared to earlier life stages.
Discussion
Older adults are predicted to show different patterns of between-sex variation in ecological affordances related to physical violence compared to younger age groups.
The framework links ecological affordances to life-stage and sex-specific goals.
In late adulthood, goals related to reproduction and physical competition that drive sex differences in younger adults are less relevant.
This shift in goals is expected to alter how physical violence in the environment is perceived and responded to differently between sexes.
Discussion
Pathogen prevalence is identified as an ecological factor whose affordance patterns may shift in late adulthood due to age-related changes in immune function and life-history priorities.
Older adults face heightened vulnerability to pathogens due to immunosenescence.
The life-stage and sex-specific goals framework predicts this vulnerability would alter the ecological affordances posed by pathogen prevalence in older adults.
Between-sex variation in pathogen-related affordances in late adulthood may differ from patterns observed in younger adults.
Discussion
Sex-age ratio in the environment is predicted to pose different ecological affordances for older adults compared to younger individuals.
Sex-age ratio as an ecological variable has implications for mating and social goals that change across the lifespan.
In late adulthood, shifts in the availability of same-age opposite-sex individuals and changes in mating-related goals are expected to modify the affordances this ecological variable presents.
Between-sex variation in responses to sex-age ratio is expected to differ in late adulthood.
What This Means
This research suggests that a theoretical framework explaining how people perceive and respond to environmental threats — such as violence, disease, and the balance of men and women in a population — can be usefully extended to older adults. The original framework argued that people's responses to these environmental features depend on their life stage and sex, because different life stages involve different goals (such as finding a mate, raising children, or competing for resources). This commentary proposes that late adulthood, with its distinct set of priorities and biological changes, would produce yet another unique pattern of how men and women respond differently to these environmental cues.
For example, this research suggests that because older adults are no longer focused on reproduction and are less engaged in physical competition, the way they perceive threats from violence or an imbalanced sex ratio in their community would differ from younger adults. Similarly, because older adults are more physically vulnerable to infectious disease due to age-related immune decline, the ecological 'signal' of high pathogen prevalence may carry different weight and meaning for older men versus older women compared to their younger counterparts.
The practical implication of this work is that theories about how environments shape human behavior and perception should not assume uniform effects across the entire adult lifespan. This research suggests that aging fundamentally changes the lens through which people interpret their surroundings, and that accounting for late adulthood could improve our understanding of how older populations respond to environmental and social conditions in their communities.
Zhang T, Rajaeian A, Varnum M. (2026). Extending ecological affordance theory to late adulthood.. The Behavioral and brain sciences. https://doi.org/10.1017/S0140525X25103166