期刊
PSYCHOPHYSIOLOGY
卷 44, 期 2, 页码 216-225出版社
BLACKWELL PUBLISHING
DOI: 10.1111/j.1469-8986.2007.00499.x
关键词
cardiovascular reactivity; reliability; internal consistency; intertask consistency; impedance cardiography; intermediate phenotype
资金
- NCRR NIH HHS [M01RR-00211] Funding Source: Medline
- NHLBI NIH HHS [HL72375, HL35788, HL47993] Funding Source: Medline
Research on the reliability of cardiovascular reactivity has focused on temporal stability and intertask consistency with only modest results. The present study evaluated the internal consistency reliability of cardiovascular reactivity in three large samples of adolescents and young adults (N=326, 136, and 142). Impedance cardiographic and blood pressure measures were recorded at rest and during standard laboratory stress tasks (math, video game, cold pressor). The reliability of cardiovascular reactivity within tasks, as assessed by Cronbach's alpha coefficient of internal consistency, ranged from alpha=.83 to .96 for 4-min to 5-min math tasks, and alpha=.65 to .94 for 3-min video game and cold pressor tasks. Although highly reliable within tasks, cardiovascular reactivity was less reliable across tasks, even within a single testing session. Possible reasons for the discrepancy between internal consistency and intertask consistency are discussed.
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