What difference did the wechsler tests have from other earlier intelligence tests?

-involves their factors and subtests

-Quantitative Reasoning: the ability to solve numerical problems

-Visual-Spatial Processing: the ability to analyze visually presented information, including relationships between objects, spatial orientation, assembling pieces to make a whole, and detecting visual patterns

-working memory: the ability to hold and transform information in short-term memory

-each of these 10 areas is assessed by one to three specific types of items.