Kohrs Christin, Hrabal David, Angenstein Nicole, Brechmann André
Non-Invasive Brain Imaging, Leibniz Institute for Neurobiology, Magdeburg, Germany.
Psychophysiology. 2014 Nov;51(11):1178-84. doi: 10.1111/psyp.12253. Epub 2014 Jul 1.
System response time research is an important issue in human-computer interactions. Experience with technical devices and general rules of human-human interactions determine the user's expectation, and any delay in system response time may lead to immediate physiological, emotional, and behavioral consequences. We investigated such effects on a trial-by-trial basis during a human-computer interaction by measuring changes in skin conductance (SC), heart rate (HR), and the dynamics of button press responses. We found an increase in SC and a deceleration of HR for all three delayed system response times (0.5, 1, 2 s). Moreover, the data on button press dynamics was highly informative since subjects repeated a button press with more force in response to delayed system response times. Furthermore, the button press dynamics could distinguish between correct and incorrect decisions and may thus even be used to infer the uncertainty of a user's decision.
系统响应时间研究是人机交互中的一个重要问题。对技术设备的体验以及人际交互的一般规则决定了用户的期望，而系统响应时间的任何延迟都可能导致直接的生理、情绪和行为后果。我们在人机交互过程中逐次试验地研究了此类影响，通过测量皮肤电导率（SC）、心率（HR）的变化以及按键响应的动态情况。我们发现，对于所有三种延迟的系统响应时间（0.5秒、1秒、2秒），皮肤电导率均增加，心率均减慢。此外，按键动态数据信息量很大，因为受试者会因系统响应时间延迟而更用力地重复按键。此外，按键动态可以区分正确和错误的决策，甚至可能因此被用于推断用户决策的不确定性。
