Final answer:
A job description is a statement detailing the duties of a job, while a job specification lists the qualifications needed. Job analyses from current job holders are sometimes less reliable, and work content is a strong predictor of job satisfaction.
Step-by-step explanation:
A job description refers to a written statement that details the responsibilities, activities, and working conditions of a job. On the other hand, a job specification describes the qualifications and skills required for the position. When we talk about job analysis, it relates to the process of systematically studying a job to determine the duties, responsibilities, and requirements. It's used to write both job descriptions and specifications. As for job evaluation, it involves assessing the value of a job in relation to other jobs within the same organization to determine appropriate compensation.
Regarding the accuracy of job analyses, research does indicate variability. As mentioned, Dierdorff & Wilson (2003) suggested that analyses based on incumbent descriptions might be less reliable. One possible speculation is that incumbents may have biases or subjective views influencing the job analysis process. Considering the overall satisfaction in a job, several factors come into play. Financial rewards, personality, autonomy, and work content can all contribute to job satisfaction, with work content being a notably strong predictor of overall job satisfaction.