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History of Intelligence Testing (Page 6)
In a point scale, credits or points are assigned to each item. Unlike the Binet age scale format, an individual receives a specific amount of credit for each item passed. On the modern Binet, a basal age may be reached whether the individual is correct on 3 out of 4 or on all 4 items at two consecutive levels. The individual who gets 3 items correct obtains the same basal score as the one who gets all four correct. Therefore, although the modern Binet abandoned the age scale concept, it did not go so far as to adopt the point scale concept. The point scale offers an inherent advantage. This scale made it easy for Wechsler to group items of particular content together. In so doing, he constructed an intelligence test which yielded not only an overall score, but also scores for content area. Hence Wechsler's test allows an analysis of the individual's ability in a variety of content areas.
  
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