Factor analyses were accomplished on the de Hirsch Test Battery scores generated by 50 5½-yr.-old youngsters. The investigator attempted to replicate sampling and screening measures used by de Hirsch in her original work. Results were interpreted in terms of Buktencia's task-analysis approach and also Satz's theoretical model of learning disability. The de Hirsch Index taps a major visual discriminatory component which is interlocked with progressively more complex processes ranging from fine motor coordination productions to immediate memory for complex visual symbols.
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