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.
It would be most effective if visual observation was impossible.
From the data and visual observations they were able to identify all the flights of the birds.
This was more than a fact of visual observation.
It was the last planetary moon to be discovered directly by visual observation.
In addition the forest shielded both sides from visual observation.
These are one man's visual observations presented as invitations to a dialogue.
The traditional way to identify foam index values is by visual observation.
All visual observations showed point images, with no sign of a dust coma.
We are going to be relying almost entirely on visual observations here.
Once inside, the only way they could be detected would be by visual observation.
