The panel study is sensitive to

(A) Experimental mortality

(B) Cost-effectiveness

(C) Response classification

(D) Instrumental criticality

Correct Ans: (A)

Explanation:

Panel studies track the same group of individuals over a long period, making them valuable for understanding trends and changes. However, they are highly sensitive to experimental mortality, which refers to the loss of participants before a study concludes.

One major cause of experimental mortality is participant dropout. People may leave due to disinterest, relocation, or time constraints. This creates gaps in data and reduces the study’s reliability. For example, a long-term study on media consumption habits may lose respondents over the years, leading to incomplete results.

Another issue is selective dropout. If certain groups are more likely to leave than others, the study becomes biased. For instance, in a research project analyzing political opinions, younger participants may drop out faster than older ones. This skews the results, making them less representative of the entire population.

Additionally, external factors can contribute to experimental mortality. Changes in life circumstances, such as health issues or job stress, may prevent participants from continuing. This is especially problematic in studies requiring detailed surveys or regular interviews.

To reduce the impact of experimental mortality, researchers use follow-up incentives, such as financial rewards or periodic reminders. Some also apply statistical methods to adjust for missing data.

In conclusion, while panel studies provide deep insights, experimental mortality remains a major challenge. Researchers must take proactive steps to minimize dropout rates and maintain data accuracy.