Introductory Psychology CLEP Prep Practice Exam 2024 - Free CLEP Practice Questions and Study Guide

Cognitive experiments are a significant contributor to the field of psychology because they involve the study of mental processes such as perception, attention, memory, language, and problem-solving. These experiments play a vital role in understanding how the mind works and inform various psychological theories. Medical experiments may also provide insights into the brain and its functions but are limited in their focus and do not encompass the entire field of psychology. Philosophical theories may have influenced the early development of psychology, but they are not considered a primary contributor. Behavioral interventions, while used in psychological treatments, are not a study or research method and therefore, do not directly contribute to the field of psychology. Therefore, the best answer is A Cognitive experiments.