Performance on neuropsychological measures of verbal memory requires cognitive abilities beyond memory. We examined the contribution of semantic knowledge in verbal episodic memory for semantic variant primary progressive aphasia (svPPA) or Alzheimer’s disease (AD). 415 AD and 68 svPPA participants completed measures of episodic memory (visual and verbal) and semantic knowledge. A double dissociation existed visual recall predicted verbal recognition in AD, whereas semantic knowledge contributed to verbal recognition in svPPA.

中文翻译：

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语义变异原发性进行性失语症和阿尔茨海默病中言语情景记忆表现的差异认知基础

语言记忆的神经心理学测量的表现需要超越记忆的认知能力。我们检查了语义知识在语义变异原发性进行性失语症 (svPPA) 或阿尔茨海默病 (AD) 的口头情景记忆中的贡献。415 名 AD 和 68 名 svPPA 参与者完成了情景记忆（视觉和语言）和语义知识的测量。双重分离存在视觉回忆预测AD中的语言识别，而语义知识有助于svPPA中的语言识别。