Modern medical imaging technologies like Magnetic Resonance Imaging (MRI), Computed Tomography (CT) and Positron Emission Tomography (PET) are increasingly complex: the single image of a chest x-ray has been replaced with hundreds of slices of chest CT scan. Finally, a recent observational case report documented a case where a misplaced femoral line was not detected by variety of health care professional who evaluated the case ( Lum, Fairbanks, Pennington, & Zwemer, 2005).īoth of these instances of apparent IB in the medical setting occurred in single-slice medical images. On the other hand, when Potchen (2006) showed radiologists chest x-rays with a clavicle (collarbone) removed, roughly 60% of radiologists failed to notice when they were reviewing cases as if for an annual exam. For example, Memmert ( Memmert, 2006) found a decreased the rate of IB for basketball players who were asked to count the number of basketball passes in an artificial game. ![]() Does inattentional blindness (IB) still occur when the observers are experts, highly trained on the primary task? There is some evidence that expertise mitigates the effect. Despite having walked through the center of the scene, the gorilla is not reported by a substantial portion of the observers ( ). ![]() This phenomenon of “sustained inattentional blindness” is best known from Simons and Chabris’ (1999) study in which observers attend to a ball-passing game while a human in a gorilla suit wanders through the game. ![]() When engaged in a demanding task, attention can act like a set of blinders, making it possible for salient stimuli to pass unnoticed right in front of our eyes ( Neisser & Becklen, 1975).
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