Almkvist O, Adveen M, Henning L, Tallberg I M
Department of Psychology, Stockholm University, Sweden.
Scand J Psychol. 2007 Jun;48(3):271-9. doi: 10.1111/j.1467-9450.2007.00575.x.
In clinical neuropsychology, the present status of a patient is evaluated in relation to the assumed premorbid status. However, in Sweden, existing methods to assess premorbid status are far from optimal. In the present study, the design and evaluation of a Swedish Lexical Decision Test (SLDT) for premorbid global cognitive function (i.e., premorbid intelligence) is described. The design was based on the empirical finding that, in general adult population, word knowledge is strongly associated with measures of global cognitive functioning. Linear stepwise regression analysis demonstrated that SLDT findings accounted for 48% of the variance of global cognitive function as assessed by the Full Scale Intelligence Quotient (FSIQ) from the Wechsler Adult Intelligence Scale Revised (WAIS-R). Demographic variables alone accounted for 31% and a combination of SLDT results and demographics accounted for 60%. Psychometric properties are presented using data from 109 healthy individuals stratified according to age, gender, and level of education. In addition, a case of Alzheimer's disease is presented to illustrate the relationship between SLDT performance and cognitive function. Finally, the theoretical foundation for the relationship between word knowledge and global cognitive function is discussed.
在临床神经心理学中，会根据假定的病前状态来评估患者的当前状态。然而，在瑞典，现有的评估病前状态的方法远非最佳。在本研究中，描述了一种用于病前整体认知功能（即病前智力）的瑞典词汇判定测试（SLDT）的设计与评估。该设计基于一项实证发现，即在一般成年人群中，词汇知识与整体认知功能的测量指标密切相关。线性逐步回归分析表明，SLDT的结果解释了韦氏成人智力量表修订版（WAIS - R）中全量表智商（FSIQ）所评估的整体认知功能变异的48%。仅人口统计学变量解释了31%，而SLDT结果与人口统计学变量相结合则解释了60%。使用来自109名按年龄、性别和教育水平分层的健康个体的数据展示了心理测量特性。此外，还呈现了一个阿尔茨海默病病例，以说明SLDT表现与认知功能之间的关系。最后，讨论了词汇知识与整体认知功能之间关系的理论基础。
