Which factor does NOT influence the application of psychological knowledge?

The application of psychological knowledge is influenced by various factors that play significant roles in determining how such information is utilized in real-world situations. Personal opinions of scientists, while they may contribute to the formation of hypotheses and theories, do not serve as a direct factor in influencing the broader application of psychological knowledge. In contrast, economic considerations can dictate funding for research and the implementation of psychological services; environmental contexts often shape the relevance and focus of psychological research in specific settings; and political contexts can affect policies related to mental health and educational programs.

The personal beliefs or opinions of individual scientists might impact their research direction or interpretation, but they do not systematically change how psychological principles are applied in practice on a larger scale. Thus, when considering influences on the application of psychological knowledge, it becomes evident that personal opinions have a lesser impact compared to other factors like economics, environment, or politics which have direct, tangible effects on implementation and practice.