Lopez C, Tchanturia K, Stahl D, Treasure J
Division of Psychological Medicine, Eating Disorders Research Unit, Institute of Psychiatry, King's College London, London, UK.
Psychol Med. 2008 Oct;38(10):1393-404. doi: 10.1017/S0033291708003486. Epub 2008 Apr 30.
This review systematically appraised the research evidence for local versus global information processing to test the hypothesis that people with eating disorders (ED) had weak central coherence.
Searches on Medline, EMBASE, PsycINFO and ISI Web of Science databases were conducted in November 2006 and subsequently updated in September 2007. Each search was conducted in two steps: (1) neuropsychological tasks measuring central coherence and (2) words related to cognitive functioning in eating disorders. Data were summarized in a meta-analysis if the number of studies for a given test was >5.
Data were extracted from 16 studies. Meta-analyses were conducted for four tasks obtaining moderate effect sizes. The majority of studies found global processing difficulties across the ED spectrum. The results are less clear regarding local processing.
People with ED have difficulties in global processing. It is less certain as to whether they have superior local processing. Currently, there is insufficient evidence to refute the weak central coherence hypothesis.
本综述系统评价了局部与整体信息加工的研究证据，以检验饮食失调（ED）患者存在弱中央连贯性这一假设。
2006年11月对Medline、EMBASE、PsycINFO和ISI Web of Science数据库进行了检索，并于2007年9月进行了更新。每次检索分两步进行：（1）测量中央连贯性的神经心理学任务；（2）与饮食失调认知功能相关的词汇。如果针对某一特定测试的研究数量>5，则在荟萃分析中汇总数据。
从16项研究中提取了数据。对四项任务进行了荟萃分析，得到中等效应量。大多数研究发现，在整个饮食失调范围内都存在整体加工困难。关于局部加工，结果不太明确。
饮食失调患者在整体加工方面存在困难。他们是否具有优越的局部加工能力尚不确定。目前，没有足够的证据反驳弱中央连贯性假设。
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