Research Findings: Stress and Immune System Connection

A review of research indicates substantial evidence supporting specific relationships between stress and the immune system. Key findings highlight how psychological states can affect physiological responses.

Evidence for Negative Stress-Immune Relationship

• Negative Correlation: Research consistently shows a negative relationship between stress and functional immune measures. This means higher levels of stress often correspond to weakened immune responses.
• Option 1 (A) is supported by substantial evidence.

Impact of Loneliness on Stress and Immunity

• Loneliness Factor: Loneliness has been identified as a significant factor that impacts the relationship between stress and immune measures. It can exacerbate the negative effects of stress on the immune system.
• Option 3 (C) is supported by substantial evidence.

Evaluation of Other Options

• Option 2 (B) is incorrect because research does show measurable impacts of stress on immune function.
• Option 4 (D) is incorrect as the substantial evidence points towards a negative relationship, particularly with chronic stress, rather than a positive one between long-term stressors and immune function.

Therefore, the statements with substantial evidence are the negative relationship between stress and immune measures, and the impact of loneliness on this connection.