How should the BD assessment be administered for child scoring?

The correct answer is based on the specific protocols outlined for administering the Block Design (BD) subtest of the WISC-V. This subtest assesses a child's visual-spatial skills and problem-solving abilities by having them replicate designs using blocks.

Administering the BD subtest properly is essential for obtaining an accurate assessment of a child's abilities. One key aspect of this administration is the approach to handling errors. If a child makes two consecutive errors during the initial forward process, the test administrator is instructed to switch to a reverse administration. This means that instead of continuing forward with increasingly complex designs, the administrator presents simpler designs to help gauge the child’s capabilities more effectively. This method allows for a better understanding of the child's functioning level and prevents unnecessary frustration or disengagement from the testing process.

Therefore, option C reflects the standardized procedure for administering the BD subtest in a way that is responsive to the child's performance, aiding in yielding valid results while maintaining the child's engagement in the assessment.