The ex-Gaussian distribution of reaction times in adolescents with attention-deficit/hyperactivity disorder

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題名:	The ex-Gaussian distribution of reaction times in adolescents with attention-deficit/hyperactivity disorder
作者:	Shoou-Lian Hwang Gu;Susan Shur-Fen Gau;Shyh-Weir Tzang;Wen-Yau Hsu
貢獻者:	財務金融學系
關鍵詞:	ADHD;Reaction time variability;Ex-Gaussian distribution;Effort allocation;Cognitive-energetic model
日期:	2013-11
上傳時間:	2013-12-06 06:51:52 (UTC+0)
摘要:	We investigated the three parameters (mu, sigma, tau) of ex-Gaussian distribution of RT derived from the Conners’ continuous performance test (CCPT) and examined the moderating effects of the energetic factors (the inter-stimulus intervals (ISIs) and Blocks) among these three parameters, especially tau, an index describing the positive skew of RT distribution. We assessed 195 adolescents with DSM-IV ADHD, and 90 typically developing (TD) adolescents, aged 10–16. Participants and their parents received psychiatric interviews to confirm the diagnosis of ADHD and other psychiatric disorders. Participants also received intelligence (WISC-III) and CCPT assessments. We found that participants with ADHD had a smaller mu, and larger tau. As the ISI/Block increased, the magnitude of group difference in tau increased. Among the three ex-Gaussian parameters, tau was positively associated with omission errors, and mu was negatively associated with commission errors. The moderating effects of ISIs and Blocks on tau parameters suggested that the ex-Gaussian parameters could offer more information about the attention state in vigilance task, especially in ADHD.
關聯:	RESEARCH IN DEVELOPMENTAL DISABILITIES,34(11),3709–3719.
顯示於類別:	[財務金融學系] 期刊論文

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