Direct observation of water movement at a very low rate can be difficult.
And that in general is what makes direct observations good.
In the 1800s, studies of eye movement were made using direct observations.
Direct observation was quite different from looking at something on a screen.
One approach to understanding this process would be to study behavior through direct observation.
Their direct observations form the primary data source for our report.
Either reports from teachers or direct observation by the professional are critical.
Much knowledge of the culture too is gained by direct observation.
Assessment could include a visit to the person's home, for direct observation of the social and living environment.
Otherwise, if you make contact, keep them under direct observation, but do nothing.
Initially influenced by Scotland's David Wilkie, England's William Hogarth and America's Benjamin West, he soon turned to direct observation of life for his genre scenes.
For example, taking the answer given by a respondent to a question as equivalent to direct observation of the event to which it refers, was an assumption upon which the method rested.
Learning from MRI, PET and SPECT scanning, scientists were able to develop functional MRI (fMRI) with abilities that opened the door to direct observation of cognitive activities.
In geology, only causes active in the present, human period are accessible in principle, although often not in practice, to direct observation.
This is a transition from speculation about the size of streambed material to direct observation of it.
During the Renaissance, scholars (herbalists and humanists, particularly) returned to direct observation of plants and animals for natural history, and many began to accumulate large collections of exotic specimens and unusual monsters.
Accordingly stresses need only to be high at isolated locations which may not be accessible to direct observation as those locations are not apriori known.
It's the greatest problem in fluid dynamics that is accessible to direct observation.
Social comparison theory suggests that when seeking to validate opinions and abilities people will first turn to direct observation.
