In field sobriety tests, what indicates an inability to follow instructions?

In field sobriety tests, multiple errors in practice consistently demonstrate an inability to follow instructions. These tests are designed to assess a person's physical and cognitive abilities to determine if they are impaired, typically due to alcohol or drugs.

When an individual commits multiple errors during the test, it suggests that they are unable to comprehend or execute the tasks as instructed. Each component of the test often necessitates careful listening, understanding, and coordination; errors indicate a failure to process these instructions correctly.

This performance insight is crucial in evaluating the suspect's level of impairment since following directions is a fundamental skill that often diminishes under the influence of intoxicating substances. The presence of numerous mistakes can signal not just an issue with physical capability but also cognitive impairment, reinforcing the determination that the individual may not be operating a vehicle safely. Other choices may signify different aspects of impairment, such as response time or distractibility, but multiple errors are a direct measure of how well instructions are followed.