Westerhausen René, Kompus Kristiina
Center for Lifespan Changes in Brain and Cognition (LCBC), Department of Psychology, University of Oslo, Oslo, Norway.
Department of Biological and Medical Psychology, University of Bergen, Bergen, Norway.
Scand J Psychol. 2018 Feb;59(1):66-73. doi: 10.1111/sjop.12408.
The dichotic-listening paradigm with verbal stimuli is a widely employed behavioral task for the assessment of hemispheric asymmetry for speech and language processing. Participants with assumed left-hemispheric dominance report the right-ear stimulus with higher probability than the left-ear stimulus. However, there is substantial between-subject and trial-to-trial variability observed in the paradigm, motivating scrutiny of the task set-up and theoretical models. Here, we give an in-depth discussion of specific features of stimulus material and experimental parameters, as well as the conditions of stimulus/response selection, which explain a significant proportion of intra- and inter-individual variability. Carefully considering these factors should be at the heart of any experimental planning when using the dichotic-listening paradigm to achieve an optimal testing situation for measuring laterality and avoid confounds in between-subject and between-group comparisons.
使用言语刺激的双耳分听范式是一种广泛应用于评估言语和语言处理半球不对称性的行为任务。假定左半球占优势的参与者报告右耳刺激的概率高于左耳刺激。然而，在该范式中观察到受试者之间和试验之间存在很大的变异性，这促使人们对任务设置和理论模型进行仔细研究。在这里，我们深入讨论刺激材料和实验参数的具体特征，以及刺激/反应选择的条件，这些因素解释了个体内和个体间变异性的很大一部分。在使用双耳分听范式时，仔细考虑这些因素应该是任何实验规划的核心，以便为测量偏侧性创造最佳测试条件，并避免受试者之间和组间比较中的混淆因素。
