Final answer:
Decreased performance in challenging tasks has not been shown to be a result of self-efficacy beliefs. High self-efficacy is generally linked to increased effort, lower stress, and greater resilience, all of which tend to improve performance on difficult tasks.
Step-by-step explanation:
The question is asking which outcome has not been demonstrated as a result of strong self-efficacy beliefs. Self-efficacy is the belief in one's own abilities to succeed in specific situations. Studies have shown that individuals with high self-efficacy tend to have Increased effort and persistence (A), Lower levels of stress (B), and Greater resilience in the face of adversity (C). These factors contribute to a person's ability to recover and adapt to difficult situations, which is particularly important in careers and academic endeavors. Conversely, Decreased performance in challenging tasks (D) has not been shown to be a result of self-efficacy beliefs; in fact, high self-efficacy is generally associated with improved performance on challenging tasks. This is because self-efficacy influences the effort a person is willing to invest and their persistence in the face of challenges, which typically enhances performance rather than decreases it.