title: Delayed system response times affect immediate physiology and the dynamics of subsequent button press behavior.
abstract: 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.
authors: Non-Invasive Brain Imaging, Leibniz Institute for Neurobiology, Magdeburg, Germany.
authors: Christin
authors: C
authors: Kohrs
authors: David
authors: D
authors: Hrabal
authors: Nicole
authors: N
authors: Angenstein
authors: André
authors: A
authors: Brechmann
mesh_terms: D000328:Adult; D005260:Female; D005712:Galvanic Skin Response / Q000502:physiology*; D006339:Heart Rate / Q000502:physiology*; D006801:Humans; D008297:Male; D008328:Man-Machine Systems; D011597:Psychomotor Performance / Q000502:physiology*; D013997:Time Factors; D055815:Young Adult
keywords: Button press dynamics; Feedback; Heart rate; Human-computer interaction; Skin conductance response; Timing