Every animal's perception of time varies, according to its heart rate.

Each child's perception of loss varies according to age and emotional development.

Perceptions of the quality of care vary greatly across the country.

Secondly, the perceptions of those adopting a change varied with the context in which each person worked, even within individual institutions.

Perceptions regarding the benefits to the nanny, however, can vary greatly.

When people look at an abstmet painting, perceptions vary greatly.

Perceptions of various bird species often vary across cultures.

Perceptions and displays of emotions vary across time and culture.

At the same time, the survey shows that perceptions of the police vary sharply across racial lines and from large cities to small towns.

The Bay men's perceptions of these sensual assignations varied according to their own experiences.