Aging and retrieval of words in semantic memory.

Area of Science:

• Cognitive Psychology
• Neuroscience
• Linguistics

Background:

• Age-related cognitive changes impact semantic memory and word retrieval.
• Understanding how aging affects accessing lexical information is crucial for cognitive health research.

Purpose of the Study:

• To investigate age-related differences in semantic memory access.
• To compare young and older adults' performance on lexical decision and word retrieval tasks.
• To explore the underlying mechanisms of age-related deficits in word retrieval.

Main Methods:

• Study 1: Lexical decision task comparing accuracy and response latency in young and old adults.
• Study 2: Word retrieval task using definitions as stimuli, assessing successful retrievals and response latency in young and old adults.

Main Results:

• No significant age differences were observed in the lexical decision task.
• Younger adults outperformed older adults in the word retrieval task, showing higher success rates and faster response times.
• Performance differences were attributed to varying retrieval demands and a potential deficit in older adults' conceptual-to-lexical access.

Conclusions:

• Older adults may experience specific difficulties in retrieving word names from conceptual information.
• A two-component model of semantic memory helps explain age-related discrepancies in lexical tasks.
• Future research should focus on the orthographic vs. conceptual nature of retrieval deficits in aging.