Final answer:
Autonomy builds on the dimension of task significance to modify the job itself, improving overall job satisfaction. Autonomy contributes to job satisfaction and is an integral part of the job design process in the context of Industrial-Organizational psychology.
Step-by-step explanation:
The job characteristics' model dimension that autonomy builds on to modify the job itself is task significance. Research indicates that autonomy and the work content factors, which include task variety and role clarity, are strong predictors of overall job satisfaction. Work content has the most substantial impact on job satisfaction, which is an essential part of job design and the measurement of employee satisfaction.
In the context of Industrial-Organizational (I-O) psychology, building a match between a person and a role requires job analysis, which involves accurately describing the tasks or job and identifying the KSAs (Knowledge, Skills, and Abilities) needed. Organizations work towards enhancing job characteristics like autonomy to increase satisfaction and performance. For example, autonomous jobs allow employees to feel they are part of the decision-making process and have some control over their work, which contributes to job satisfaction.