Cultural influences on inner voice can be categorized into shaping beliefs and values, providing norms for behavior, and influencing the activation of the inner voice based on cultural principles. Different cultures, such as independent and interdependent cultures, impact the inner voice differently. In independent cultures like the US, failure to achieve personal goals can activate inner voice chatter, while in interdependent cultures like Japan, standing out and drawing attention may lead to inner voice activation. Cultural values and norms play a significant role in determining how individuals talk to themselves in their head, reflecting the broader cultural influences on inner voice.