2. compare and contrast the independent and dependent variables in an experiment. give an example of each.

In experimental psychology distinguish two kinds of variables:  

An INDEPENDENT variable is a factor that is controlled by the authors of the study. For example, in an experiment to study the effect of lack of sleep on performance, sleep deprivation is an independent variable.  

A DEPENDENT variable is a phenomenon that experimenters fix and measure. For example, the performance test results are just a dependent variable.

d - failures.

the only attempted british colony in north america before 1600 was roanoke, virginia, which was a total failure. england claimed several areas, including newfoundland, but made no sustainable attempts to colonize them before 1600.

answer; procedural justice;