Cognitive Advantage in Bilingualism: An Example of Publication Bias?
Cognitive Advantage in Bilingualism: An Example of Publication Bias?
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DOI：
10.1177/0956797614557866
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发表时间：
2015-01-01
影响因子：
8.2
通讯作者：
Della Sala, Sergio
中科院分区：
文献类型：
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作者：
de Bruin, Angela;Treccani, Barbara;Della Sala, Sergio
人们普遍认为，双语者在执行控制任务方面比单语者更有优势，但所有研究实际上都证明了这一点吗？双语优势的观点可能是由于发表偏倚倾向于有积极结果的研究，而不是没有或负面影响的研究。为了验证这一假设，我们查看了1999年至2012年关于双语和执行控制主题的会议摘要。然后，我们确定他们报告的哪些研究随后发表。结果完全支持双语优势理论的研究最有可能发表，其次是结果好坏参半的研究。挑战双语优势的研究发表得最少。这种差异不是由于样本量、使用的检验或统计能力的差异。对漏斗图不对称的检验进一步证明了发表偏倚的存在。
It is a widely held belief that bilinguals have an advantage over monolinguals in executive-control tasks, but is this what all studies actually demonstrate? The idea of a bilingual advantage may result from a publication bias favoring studies with positive results over studies with null or negative effects. To test this hypothesis, we looked at conference abstracts from 1999 to 2012 on the topic of bilingualism and executive control. We then determined which of the studies they reported were subsequently published. Studies with results fully supporting the bilingual-advantage theory were most likely to be published, followed by studies with mixed results. Studies challenging the bilingual advantage were published the least. This discrepancy was not due to differences in sample size, tests used, or statistical power. A test for funnel-plot asymmetry provided further evidence for the existence of a publication bias.