At one time, psychologists had to rely on the subjective reports of people who said that they never dream. When the EEG was invented, it was found that everyone dreams every night. Thus, until the invention of the EEG, sleep and dreaming were not objectively studied because Group of answer choices there was not a suitable research method available to study the TOPIC (B-HEAD). it was not considered a suitable TOPIC (B-HEAD) for psychological research. there was a lack of interest in understanding sleep and dreaming. it was unethical to watch people sleep.