Marcos J L, Redondo J
Departamento de Psicología, Campus de Elviña, s/n. Universidad de La Coruña, 15071 La Coruña, Spain.
Span J Psychol. 2001 May;4(1):11-8. doi: 10.1017/s1138741600005606.
Previous research on electrodermal conditioning suggests that the conditioned diminution of the unconditioned response (UR) has an associative basis. The aim of this experiment was to test whether this phenomenon also occurs in heart rate (HR) classical conditioning. For this purpose, a differential classical conditioning was performed. The conditioned stimuli (CSs) were geometrical shapes (the CS+ was a square and the CS- was a triangle) displayed on a computer screen and a burst of white noise was used as unconditioned stimulus (US). For analysis of the conditioned response (CR) components, an interval between CS+ and US of 8 seconds was used. After the acquisition phase, participants were tested using trials with the US preceded either by a CS+, a CS-, or a neutral stimulus (a circle). The results showed conditioned diminution of the UR and suggest that the second heart rate deceleration component (D2) is responsible for the occurrence of this phenomenon.
先前关于皮肤电条件作用的研究表明，无条件反应（UR）的条件性减弱具有联想基础。本实验的目的是测试这种现象是否也发生在心率（HR）经典条件作用中。为此，进行了差异经典条件作用。条件刺激（CSs）是电脑屏幕上显示的几何形状（CS+为正方形，CS-为三角形），一阵白噪声用作无条件刺激（US）。为了分析条件反应（CR）成分，CS+和US之间的间隔为8秒。在习得阶段之后，使用在US之前呈现CS+、CS-或中性刺激（圆形）的试验对参与者进行测试。结果显示了UR的条件性减弱，并表明第二次心率减速成分（D2）是这种现象发生的原因。
