Final answer:
In assessments, one person may sign as the rater if alone, but generally cannot sign as both rater and senior rater; the exact number of blocks they may not sign may be found in the organization's specific policies.
Step-by-step explanation:
When evaluating performance, some organizations may have protocols for who signs in the rater and senior rater blocks on assessment forms. If only one person is available, they should sign as the rater. However, for the integrity of the evaluation process, the same person may not sign both as the rater and senior rater on the same form. The specific number of blocks a single person may not sign more than, if such a rule applies, will depend on the organization's policies and regulations. It's important to consult the relevant guidelines of the specific institution or company to adhere to proper procedures.