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In the quest to create a machine that will outsmart the most intelligent human, Selmer Bringsjord and graduate student Bettina Schimanski have developed the first-known robot capable of passing part of a standard IQ test. Bringsjord is director of the Rensselaer Artificial Intelligence and Reasoning Lab and is professor and chair of the Department of Cognitive Science.
PERI (Psychometric Experimental Robotic Intelligence) is a four-foot-tall artificial intelligence system equipped with a gripper and a vision system. PERI can reason, see, and physically manipulate objects.
To test PERIs intelligence, Bringsjord and Schimanski used a section of the Wechsler Adult Intelligence Scale-Revised (WAIS), one of the gold standards in IQ testing. PERI passed the exam with a perfect score. Thats something few people achieve.
The section used, called the Block Design, is a timed-performance exam that uses cards with printed designs. Presented with red and white plastic blocks, the test-taker is instructed to arrange the blocks to match each card design. Each succeeding design is more difficult to match. PERI computed the arrangement of each design in a fraction of a second. Using its eye and gripper, the robot then placed each block in the appropriate pattern.
The machine could allow cognitive scientists to see what does or doesnt constitute the mind of a genius, Bringsjord says.
Though we can use statistics to estimate the difficulty of standardized tests, such as the SAT and LSAT, we really dont know what is going on inside the brains of humans who take these exams, Bringsjord says.
The researchers are still developing PERI to outperform its human counterpart in other sections of the WAIS IQ test. For instance, PERI cant arrange pictures to tell a story in chronological order, with each scene building on the previous one.
|Rensselaer Magazine: December 2002|
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