Lexical Decision Task for Studying Written Word Recognition in Adults with and without Dementia or Mild Cognitive Impairment

作者： Alexandre Nikolaev1, Eve Higby2,3, JungMoon Hyun4, Sameer Ashaie5,6 1Helsinki Collegium for Advanced Studies,University of Helsinki, 2University of California, Riverside, 3California State University, East Bay, 4Hunter College,City University of New York, 5Feinberg School of Medicine,Northwestern University, 6Shirley Ryan AbilityLab

简介：

Overview

This article describes a lexical decision experiment designed to assess written word recognition in both neurologically healthy individuals and those with dementia. The study also details reaction time analysis through principal components analysis (PCA) and mixed-effects modeling.

Key Study Components

Area of Science

• Neuroscience
• Cognitive Psychology
• Language Processing

Background

• The lexical decision task measures word recognition speed.
• This task can reveal characteristics of the mental lexicon.
• The lexicon may change with aging and neurodegenerative disorders.
• It requires less coordination of cognitive abilities compared to other language tasks.

Purpose of Study

• To assess written word recognition in different populations.
• To analyze reaction times using advanced statistical methods.
• To provide insights into cognitive decline in dementia patients.

Methods Used

• Implementation of a lexical decision experiment.
• Use of PCA for reaction time analysis.
• Mixed-effects modeling for statistical evaluation.
• Participant setup in a controlled environment.

Main Results

• Identification of differences in word recognition speed.
• Insights into the mental lexicon's characteristics.
• Demonstration of the experimental procedure.
• Analysis of reaction times across different participant groups.

Conclusions

• The lexical decision task is effective for assessing word recognition.
• It can be utilized in populations with cognitive impairments.
• Statistical methods enhance the understanding of reaction time data.

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