What effect does an interview subject's intelligence level have on the investigator's ability to read behavioral clues?

The assertion that an interview subject's intelligence level does not impact the investigator's ability to read behavioral clues is reflective of the idea that effective communication and observational skills are essential for an investigator, regardless of the subject's intelligence. An investigator is trained to identify behavioral clues, which can include body language, facial expressions, and verbal cues, that may indicate deception or truthfulness in any individual, regardless of their cognitive abilities.

While a subject's intelligence may influence their understanding of the interview process or their responses, it does not necessarily hinder the investigator's capacity to observe and interpret their behavior. Investigators utilize a variety of techniques and skills to assess honesty that can be applied broadly across different types of individuals. The ability to discern behavioral indicators is more reliant on the investigator's training and experience than on the subject's intelligence level. Thus, the conclusion that intelligence level does not affect this ability is justified.