Cognitive Development in Late Adulthood — Previous Year Questions
📊 Overview
- Frequency: 8 questions | Papers: 7/27 | 🟡 Medium Priority
- Most common: Cognitive changes in old age; fluid vs crystallised intelligence in late adulthood
📝 Master Answer (250 words / 6 marks)
Q. Describe cognitive changes during old age. (6 marks)
Cognitive development in late adulthood (60+ years) involves both losses and preserved abilities, reflecting the multidirectional nature of development.
Processing Speed
The most consistent cognitive change in old age is the slowing of processing speed — the rate at which cognitive operations are performed. Older adults take longer to perceive, encode, and respond to information. This affects performance on timed tests and everyday activities requiring rapid response.
Fluid vs Crystallised Intelligence
- Fluid intelligence (novel problem-solving, abstract reasoning, information processing speed) shows substantial decline from middle adulthood. Older adults perform significantly lower on tests of fluid intelligence compared to younger adults.
- Crystallised intelligence (vocabulary, accumulated knowledge, verbal reasoning) remains stable or continues to grow into the 70s for healthy older adults.
Memory Changes
- Working memory: Significant decline; reduced capacity to hold and manipulate information simultaneously
- Episodic memory (memory for personal experiences): Declines with age
- Semantic memory (general knowledge): Well-preserved in healthy ageing
- Procedural memory (motor skills, habits): Largely preserved
- Source memory (remembering where/when one learned something): Declines
Attention
- Divided attention (doing two things at once) and inhibition (filtering irrelevant information) show age-related decline
- Selective attention for highly familiar tasks is relatively preserved
Cognitive Reserve and Dementia
Cognitively active older adults (education, reading, social engagement) show slower cognitive decline — the cognitive reserve hypothesis. However, a significant minority (approximately 5–8% of over-65s) develop dementia (e.g., Alzheimer's disease), which involves progressive, severe cognitive decline beyond normal ageing.
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📅 Key Previous Year Questions
- Cognitive changes in late adulthood / old age (multiple years)
- 2022-June: Cognitive development in late adulthood
- 2019-December: Cognitive changes in old age
💡 Exam Tips
- Always use fluid vs crystallised intelligence as the main framework
- Include memory types (episodic, semantic, procedural) — explain which are preserved and which decline
- Mention cognitive reserve — it shows knowledge of practical implications
- Distinguish between normal cognitive ageing and dementia/Alzheimer's