What type of observation involves measurable data like blood pressure and pulse?

Objective observation is characterized by the collection of measurable and observable data that can be quantified, such as blood pressure, pulse rate, temperature, and other vital signs. This type of observation relies on factual, empirical evidence that can be verified and recorded, which is crucial in healthcare settings.

In contrast, subjective observation involves personal interpretations or opinions based on individual feelings or perceptions, which aren't quantifiable. Impartial observation, while it may sound relevant, is not a standard term used to describe types of observations in healthcare and generally emphasizes neutrality rather than the nature of the data collected. Similarly, feedback observation implies a form of response or evaluation rather than the direct measurement of physical signs. Thus, the focus on quantifiable data makes objective observation the correct choice in this context.