We describe SSESAy, aste m fSortud ying tEheff ectivenesAsni ofma tions, and an empirical study that evaluates two visualization design atterd aibuts aes t. SestSiEngA w as createnvironment for studying the effects of various attrin on vibutes ien viwer sualization desigcomprehension. Researchers create a series of animastiigonsn c ihan SracStEeAr wisittih ac i n demind. SSEA allows these animations to be viewed while rnteecroarcditingons t ahend viewers iresponses to questions about the underlying algorithm. At the conclusion of running all experiments, the researchers can examine the log fforilme as gnaelnyesriast ofed, a thend pe rresponses and timings with respect to the attribute iben aing s eexraimeisne ofd. T he firststudies to be conducted examined the attributes: comparishnion cqueuesi ng and exchange tecusing traditional and popup questions, measuring comprehension a. nd perception, respectivelyNo significant effects were observed in comprehension quefectsst wionsere. S found ignificant efin the perceptual questions.