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Geary, David C.; And Others – 1987
To isolate the process deficits underlying a specific learning disability in mathematics achievement, 77 academically normal and 46 learning disabled (LD) students in second, fourth or sixth grade were presented 140 simple addition problems using a true-false reaction time verification paradigm. (The problems were on a video screen controlled by…
Descriptors: Addition, Cognitive Processes, Computation, Elementary Education