Final answer:
Eye movement picture studies are used to test voluntary gaze in those with frontal lobe lesions. The method involves tracking eye movements while viewing a series of pictures.
Step-by-step explanation:
Eye movement picture studies are used to test voluntary gaze in individuals with frontal lobe lesions. One method of testing is by tracking eye movements while viewing a series of pictures. This can help assess the ability to voluntarily shift gaze and track objects in the visual field. The other options mentioned, such as observing images without making any eye movements, analyzing moving objects while keeping eyes closed, and memorizing images without visual fixation, are not specific methods used in this particular study.