Final answer:
An employee survey is a highly effective method for accessing direct written feedback, as it allows for anonymous and structured responses using methods such as Likert scales, which make it easier to measure and compare. (option C)
Step-by-step explanation:
One of the most highly effective methods of accessing direct feedback in a written format is through an employee survey. Such surveys can collect anonymous responses that can help in gaining honest feedback from employees regarding their job satisfaction and their opinions on the workplace environment. An employee survey typically uses a structured method such as a Likert scale to measure responses, which makes it easier for organizations to assess and compare the collected data.
While email correspondence can also be an option for gathering feedback, it may not always provide the structured, quantifiable data that surveys offer. Gathering data at the end of a performance review may be too infrequent and could introduce bias based on the specific context of the review. Directly asking an employee for their opinion can be effective but may not ensure anonymity, which can influence the authenticity of the feedback provided.
Therefore, the employee survey stands out as a structured and anonymous way to collect detailed feedback, enabling employers to measure satisfaction and make informed decisions aimed at improving the workplace.