What major contribution did David Wechsler make to intelligence testing?

David Wechsler made a significant contribution to intelligence testing by including nonverbal measures in his assessments. His approach was revolutionary in that it acknowledged the limitations of traditional intelligence tests that primarily focused on verbal abilities. By incorporating nonverbal components, Wechsler aimed to provide a more comprehensive evaluation of intelligence, recognizing that individuals may exhibit cognitive strengths in ways that are not solely verbal.

Wechsler's tests, specifically the Wechsler Adult Intelligence Scale (WAIS) and the Wechsler Intelligence Scale for Children (WISC), are designed to assess various intellectual capabilities, including perceptual reasoning and working memory, alongside verbal comprehension. This multifaceted approach allows for a better understanding of an individual's cognitive profile, catering to diverse learning styles and abilities, which is particularly beneficial in educational and clinical settings.