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Handbook for fluency training: Fast and accutate sight words

What is the Wechsler Intelligence Scale for Children?
This is the most commonly used instrument for assessing the intellectual ability of students and is now in its fourth edition (known as the WISC-IV). It is administered individually. It contains several subtests that measure different facets of intellectual ability. It provides a measure of general intellectual functioning (known as the Full Scale IQ) and four index scores:
Verbal Comprehension Index (summarizes student’s performance in verbal reasoning, comprehension and conceptualization)
Perceptual Reasoning Index (summarizes the student’s performance in perceptual reasoning or reasoning without the use of language and perceptual organization
Working Memory Index (summarizes the student’s attention, concentration and working memory, which is the ability to maintain information in conscious awareness while performing some operation or manipulation with it)
Processing Speed Index (summarizes the speed of information processing)