This report, prepared for an Applied Research Skills module at Ulster University, delves into various aspects of business research methodologies. The report begins by examining the purpose, advantages, and disadvantages of observation as a data collection method, followed by an analysis of its different dimensions (controlled vs. uncontrolled, participant vs. non-participant, structured vs. unstructured, and concealed vs. unconcealed). It then explores ways to minimize observer bias, such as training, clear procedures, setting time frames, and defining behavior. The report provides a critical evaluation of the ethics of using concealed observation, including consent, confidentiality, and potential impacts on participants. Moving on to Task 2, the report discusses mechanisms for administering online questionnaires, outlining their pros and cons. It describes the principles of wording in questionnaire design and examines the relationship between multiple data collection methods and sources of reliability. The report concludes with a critical evaluation of the inherent biases in different data collection methods.