**Core Concept:** Berkesonian bias is the tendency of individuals to prefer information that confirms their pre-existing beliefs or opinions. This bias occurs due to the confirmation bias, where people selectively seek, interpret, and recall information in a way that supports their preexisting beliefs.

**Why the Correct Answer is Right:** Berkesonian bias is a specific form of confirmation bias, where individuals seek and interpret data in a way that supports their pre-existing views. In this case, the correct answer is "D" because it represents confirmation bias, which is the root cause of Berkesonian bias. People tend to favor information that supports their pre-existing beliefs, leading them to overlook or dismiss contradictory evidence.

**Why Each Wrong Option is Incorrect:**

A. **Option A (Bias towards new information):** Berkesonian bias is not about a preference for new information; instead, it is about selectively favoring data that aligns with pre-existing beliefs.

B. **Option B (Intrinsic to humans):** Berkesonian bias is not inherent to all humans; it occurs in individuals who exhibit confirmation bias.

C. **Option C (Only in group discussions):** Berkesonian bias is not limited to group discussions; it can occur in individuals when they interact with themselves, books, or other sources.

**Clinical Pearl / High-Yield Fact:** Understanding confirmation bias and its manifestations, such as Berkesonian bias, is crucial for medical professionals. This knowledge helps to recognize and minimize the impact of these biases in diagnoses, treatments, and communication with patients, ensuring more accurate assessments and effective patient care.

**Correct Answer:** D. Confirmation bias (Berkesonian bias)