Which of the following methods is most likely to ensure the validity of study findings?

Implementing triangulation by incorporating multiple methods significantly enhances the validity of study findings. Triangulation involves the use of different perspectives, theoretical approaches, and data collection methods to examine a research question. By employing a combination of qualitative and quantitative methods, researchers can corroborate evidence from various sources, which helps to address potential biases and strengthens the overall credibility of the results. This comprehensive approach allows for a more nuanced understanding of complex issues, as it acknowledges the multifaceted nature of human behavior and psychological phenomena.

In contrast, using a single method for data collection may limit the depth and breadth of the findings. Relying exclusively on quantitative measures could overlook important qualitative insights that contribute to a holistic understanding of the subject matter. Additionally, opting for a small sample size can reduce the reliability and generalizability of findings, making it difficult to draw robust conclusions that apply broadly to the population of interest. Thus, the incorporation of multiple methods through triangulation stands out as an effective way to validate research outcomes.