Auditory Spatial Task Research Articles

Ear asymmetry in an auditory Spatial Stroop Task as a Function of Handedness

a reaction-time (RT) experiment was carried out in which five groups consisting of subjects with various degrees of left and right handedness, participated. The words left and right were presented binaurally, one at a time, either to the left or to the right side, implying four presentation modes. The two interfering presentation modes are regarded as Stroop tasks. Two reaction conditions .were applied in separate sessions; 1. reacting to the perceived location, and 2. reacting to the content of the word.With specific hypotheses concerning cerebral dominance for verbal functions in right-handed subjects, but with considerably less clear anticipations with respect to left-handers, we obtained an interaction between side of presentation, Stroop effect and handedness.The results are discussed in terms of the relation between the conceptualization of space and cerebral dominance.

Perception of sequences of visual temporal and auditory spatial stimuli by aphasic, right hemisphere damaged, and non-brain damaged subjects

Twenty-four aphasic subjects with left hemisphere brain damage, fifteen subjects with right hemisphere brain damage and twenty control subjects with no brain damage participated in visual temporal and auditory spatial sequencing tasks. In the visual temporal task, four colored lights were flashed in various sequences, and subjects reported the order of the lights by operating colored pushbuttons. In the auditory spatial task, bursts of noise were delivered in various sequences to four speakers placed in an arc around the subject, and subjects reported the order of the sounds by operating push-buttons under each of the speakers. Both groups of brain damaged subjects performed less well on both tasks than the group of normal subjects, and both groups of brain damaged subjects performed less well on the auditory temporal task than the visual spatial task. Further investigations to specify the functions served by the two hemispheres are proposed.