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Differential Effects of Age and Simulated Sensory-Motor Constraints on Digit Symbol Substitution Test Performance
Anna Heggenberger1, Kai Leisge1, Sabine Schaefer1
1Sport Science Institute, Saarland University, Saarbruecken, Germany.
Experimental Aging Research
|July 15, 2026
Summary
Age significantly impacts cognitive performance more than temporary sensory or motor limitations. While younger adults compensated for simulated constraints, their learning trajectories were altered, unlike older adults who showed consistent declines.
Area of Science:
- Cognitive Psychology
- Neuroscience
- Gerontology
Background:
- Cognitive performance in aging is influenced by central processing declines and sensorimotor limitations.
- This study investigates the impact of simulated sensory and motor constraints on cognitive tasks.
Purpose of the Study:
- To examine how simulated sensory and motor constraints affect Digit Symbol Substitution Test (DSST) performance in younger adults.
- To compare the performance of younger adults under constraints with that of older adults without constraints.
Main Methods:
- 84 young adults (19-37 years) were assigned to control, visual, motor, or combined constraint groups.
- 20 older adults (60-75 years) served as a comparison group.
- Participants practiced the DSST, with recognition and reconstruction tasks assessing memory.
Main Results:
- Older adults demonstrated poorer performance and memory compared to all younger groups.
- Younger adults largely compensated for simulated constraints, showing no significant overall performance difference.
- Constraints in younger adults led to slower learning and performance plateauing, but did not affect memory recall.
Conclusions:
- Age is a more significant factor in overall performance and memory than temporary peripheral limitations.
- Younger adults possess cognitive-motor resources to overcome moderate constraints, though learning is affected.
- Simulated constraints alter learning trajectories in younger adults during DSST-like tasks.
