To adapt empirical research methods in HCI for studying emerging technologies like augmented reality (AR) and brain-computer interfaces (BCI), researchers can incorporate specialized tools and techniques tailored to these technologies. For AR, researchers can utilize eye-tracking devices to analyze user gaze patterns and interactions within AR environments. Conducting user studies in real-world AR settings can provide valuable insights into user behavior and preferences. In the case of BCI, researchers can employ neuroimaging techniques such as EEG to measure brain activity during interaction with BCI systems. This data can help evaluate cognitive workload, user engagement, and overall usability of BCI devices. Additionally, researchers can explore innovative experimental designs that account for the unique characteristics and challenges posed by AR and BCI technologies.