Under 'Learning Disability', which specific learning disorder or symptom complex was highlighted by psychologists Kurt Goldstein and later A.A. Strauss and Lehtinen during their study of brain-injured children, in which the child is unable to distinguish between the background and the figure and is easily distracted by complex stimuli?

In the study of child development and exceptional children, the works of Kurt Goldstein, A.A. Strauss, and Lehtinen (1947) hold special significance. While studying the behavior of 'brain-injured children', they found that such children exhibit a severe problem in 'Figure-Ground Perception', which is also known as Strauss Syndrome. A child suffering from this disorder fails to differentiate between the main figure and its background in any visual or auditory stimulus, making them highly distractible.