预备课程是针对考试的，而认知训练工具是针对潜在的技能-比如操作部分，图表等式。
The prep courses teach to the test, but perceptual training tools are aimed at the underlying skills - manipulating fractions, graphing equations.
图表加工是指人们对图表所呈现信息的认知加工。
Graph and table processing refer to human cognitive processing of information in graph and table.
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