Final answer:
Psychological studies face obstacles such as studying the mind, which is not directly observable, and the need for ethical considerations and informed consent when studying human participants.
Step-by-step explanation:
Psychological studies face several obstacles that other scientific research doesn't. One significant obstacle is the difficulty of studying the mind, which is not directly observable like behavior. While behavior can be observed, understanding the underlying reasons for behavior requires creative methods, especially when individuals are unable or unwilling to provide direct explanations. Another obstacle is the need for ethical considerations and informed consent when studying human participants, which may not be as prevalent in other scientific disciplines.