The first IQ test was designed by

A) Ebbinghaus and Thorndike.
B) Binet and Simon.
C) Calkins and Washburn.
D) James and Lange.

Binet and Simon

Alfred Binet and Théodore Simon developed the first practical intelligence test in the early 20th century, laying the groundwork for modern IQ testing.

Ebbinghaus and Thorndike

Two influential psychologists; Ebbinghaus is known for his work on memory and forgetting, while Thorndike is known for his work on learning and the law of effect.

IQ Test

A standardized test designed to measure human intelligence and cognitive abilities in relation to an age group, often used for educational placement, assessment of intellectual disability, and job applicant evaluation.