Independence in testing provides several benefits. Firstly, it helps remove the biases that might be introduced by the person who developed the code or created the tests (ii). This is because an independent tester can evaluate the software without being influenced by their prior work. Secondly, different people bring different perspectives and assumptions to the testing process, which can help uncover different types of weaknesses (iv).
References:
* ISTQB CTFL Syllabus V4.0, Section 1.5.3 on the benefits of independence in testing, which emphasizes the reduction of bias and the introduction of diverse viewpoints.