HRV as an Index of Impulse Control in Dogs: Experiment 2

In this experiment, dogs were either cued to lie-down in front of a brick for 10 minutes (Interesting condition) or to lie-down in front of a brick (Uninteresting condition) while their cardiac activity was measured.

Each test session consisted of three phases. First, the dog was placed in the car cage and a 20 min baseline measurement was collected. After this baseline measurement, the dogs were taken out of the car and led to a place in which they had to lie down in front of either a toy (i.e., Interesting condition) or a brick (Uninteresting condition) for 10 minutes. After the experimental phase, another measurement was taken in the car cage in order to measure cardiac activity during recovery.

De dataset shows the data for every individual in every phase and condition. IBI’s were exported as text files with the Polar® software Polar Protrainer 5, and artifacts in the data were visually detected and deleted with the ARTiiFACT software (Version 2.09; Kaufmann, Sütterlin, Schulz, & Vögele, 2011). In accordance with the literature, five minutes of each phase were used to calculate HRV. Of the baseline phase, the last five minutes were analyzed. This allowed us to eliminate the stress-effects of beginning the experiment and of putting the polar strap around the chest of the dog. Of these five minutes, the last 30 seconds were removed to account for approaching the car and opening the trunk during that timeframe. Of the manipulation and recovery phase, the middle five minutes were analyzed in order to eliminate noise in the data caused by the handler’s presence when leaving or approaching the dog at the beginning and end.

在本项实验中，对犬类进行了指示，使其在砖块前躺下，持续时间为10分钟，其中一组为有趣条件（犬类被指示在玩具前躺下），另一组为无趣条件（犬类被指示在砖块前躺下），同时测量其心脏活动。每次测试会话分为三个阶段。首先，将犬只放入汽车笼中，收集20分钟的基线测量数据。基线测量后，将犬只带出汽车，引导其至指定地点，在该地点前躺下，持续10分钟，地点分别设定为玩具前（有趣条件）或砖块前（无趣条件）。实验阶段结束后，在汽车笼中对犬只进行再次测量，以评估恢复期心脏活动。数据集展示了每个个体在每个阶段和条件下的数据。使用 Polar® 软件Polar Protrainer 5将心搏间隔（IBI）导出为文本文件，并利用 ARTiiFACT 软件（版本2.09；Kaufmann, Sütterlin, Schulz, & Vögele, 2011）对数据中的伪迹进行视觉检测和删除。根据文献报道，每个阶段选取了五分钟的数据用于计算心率变异性（HRV）。对基线阶段，选取了最后五分钟进行分析，以消除实验开始时以及给犬只佩戴 Polar 带所带来的压力效应。在这五分钟中，最后30秒被移除，以考虑到在此时间段内接近汽车和打开车尾箱的情况。对操作和恢复阶段，分析了中间的五分钟，以消除由于操作者在犬只离开或接近时产生的噪声。