An experiment tested whether the context of the learning env…

An experiment tested whether the context of the learning environment was important in memory recall.  Sixteen people learned a list of 40 unrelated words either inside a room or outside of a house on a patio.  Later they were asked to recall the words in either the same environment they learned the list of words in or the alternative environment. The number of correctly recalled words was measured. What level of measurement is the variable, learning environment?

Dr. Johnson hypothesizes that NutraSweet reduces short-term…

Dr. Johnson hypothesizes that NutraSweet reduces short-term memory. In order to test her hypothesis she gives 10 subjects a beverage containing NutraSweet (treatment group) and 10 subjects a beverage without NutraSweet (control group). She then measures the subject’s ability to recall a list of numbers. What is the independent variable?