The researcher then records the time of the tail flick.

And researchers have recorded some birds returning each winter for twenty years.

Then, the researchers tracked the women's health over the next five years and recorded how many developed Alzheimer's.

The researchers record the doctors' comments and later trace the thought processes.

In all cases, the researchers recorded higher blood pressure readings and heart rates among the subjects.

They were interviewed in groups of 2 or 3 although the researcher recorded individual responses for each question on the form.

However, researchers of the events record a much higher death toll.

The researchers recorded whether the volunteers were able to read the instructions and, if so, how much trouble they had.

In that study, the researchers periodically recorded participants' weight, among other medical information.

Depending on the source of information, researchers have recorded anywhere from 65 to 80 species.