Final answer:
The Critical Incident Technique is less appropriate for jobs requiring a lot of immeasurable mental effort since it emphasizes specific, observable behaviors rather than the abstract cognitive processes involved in these types of jobs.
Step-by-step explanation:
To answer which job analysis technique is inappropriate for jobs requiring a lot of immeasurable mental effort, we need to understand that these types of positions often involve complex and abstract thinking that is not easily observable or quantifiable. Among the options provided, the Critical Incident Technique (D) is less appropriate for jobs heavy in mental effort. This technique focuses on specific, observable behaviors that lead to success or failure in job tasks. However, immeasurable mental effort is difficult to capture with this approach since it deals with cognitive processes that do not always result in immediately observable actions.
Job analysis techniques like the Task Analysis (A) and Functional Job Analysis (C) would be more adaptable to such roles as they are capable of encompassing a wider range of job activities, which may include mental processes. The Position Analysis Questionnaire (B), while broad, is also structured in a way that may not capture the full scope of immeasurable mental effort often required in complex job roles.