An empirical perspective means a perspective derived from the performing of scientific tests, usually by comparing two groups that reflect two different conditions, or one group under two different conditions. These groups are compared to see if the condition produced a statistically significant difference or not. "Empirical" is often used as another term for "experimental."
Applied perspectives research are conducted in natural circumstances and usually seek to produce a particular change in a person or organism, usually of practical significance. Statistical significance may or may not be sought. The number of subject can be only one and if more is usually small. Usually the change is individually assessed. People may try to draw more general conclusions from these anecdotal or single case results. Often applied work leads to hypotheses that are later researched through empirical means. Applied perspectives are more interested in applying information for treatment of people or organisms.