Final answer:
The area of applied psychology most stimulated by WWII was industrial psychology, specifically, organizational psychology within the I-O field measures job satisfaction. The war led to significant advancements in I-O Psychology, influencing job selection systems and employment test fairness, with notable contributions from psychologists like Lillian Gilbreth.
Step-by-step explanation:
The area of applied psychology most stimulated by WWII was industrial psychology. During the war, Walter Bingham was appointed as the chief psychologist for the War Department where he developed new systems for job selection, classification, and training. This led to significant advancements in both industrial psychology and organizational psychology, greatly influencing the field of Industrial-Organizational (I-O) Psychology.
Specifically relating to I-O Psychology, the area that measures job satisfaction is organizational psychology. Given that industrial psychology focusses more on hiring and employee maintenance, while organizational psychology is concerned with employee relationships and overall organizational culture, it is the latter that primarily addresses job satisfaction.
From World War II to Industrial Psychology
Post-WWII, the importance of psychological concepts in the work environment became paramount. Research into job satisfaction, employee motivation, and the fairness of employment tests were hot topics. Psychologists like Lillian Gilbreth contributed to this field by studying efficiency the workplace and inventing useful tools like the foot-pedal-operated garbage cans and the shelved refrigerator doors.