The sensory stimulus does not have to be a visual one, though. Reaction time can be measured as a response to other sensory stimuli, too, such as a sound or a touch. In fact, reaction times to sound have been shown to be faster, on average, than reaction times to visual stimuli.eaction time can be measured as a response to other sensory stimuli, too, such as a sound or a touch. In fact, reaction times to sound have been shown to be faster, on average, than reaction times to visual stimuli.
Body Dysmorphic Disorder. Body dysmorphic disorder (BDD) is a distinct mental disorder in which a person is preoccupied with an imagined physical defect or a minor defect that others often cannot see.
Body dysmorphic disorder (BDD) (also body dysmorphia, dysmorphic syndrome dysmorphobia or dysmorphophobia) is a mental disorder, a somatoform disorder, that involves a distorted body image and a pathological fear of a personal physical defect or deformity.ommon symptoms of BDD include: 1  Obsessive thoughts about (a) perceived appearance defect(s). 2  Obsessive and compulsive behaviors related to (a) perceived appearance defect(s) (see section below). 3  Major depressive disorder symptoms.