<p>Methods and systems allow measurement of effectiveness of advertising campaigns based on online advertisements targeted towards specific sets of members. A set of members is allowed to see an advertisement whereas another set of members is withheld from seeing the advertisement under conditions similar to the first set. Test sets obtained from the two sets of members are polled with questions evaluating effectiveness of advertisement. The poll questions evaluate effectiveness based on factors including brand awareness, purchase intent, or brand favorability. Statistical analysis is performed to quantitatively measure the effectiveness of the advertisement by measuring the improvement in above factors as a result of showing the advertisement.</p>
