Restore this text by completing the second half of the partially deleted words, just as you do with texts using VEA's Skill-Builder tool.  This will help you improve your language skills at different levels.   The experiment aimed to study the positive effect of spaced repetition. Participants were asked to try to recall the name of the person shortly after they had just met him or her and then again after a longer inte[Fill in the blank], . Instead of trying to recall the name every 30 minutes, it is advisable to space out the repetition and recall the name after 5 minutes, 30 minutes, and then after 2 hours. In an experiment that tested steady against expa[Fill in the blank], retrieval practice, 250 students studied 30 immunology and reproductive physiology concepts. The students were divided into five groups. Two groups recalled the conc[Fill in the blank], actively at a steady inter[Fill in the blank], without (days 1, 10, 20) or with a delay of 7 days (days 8, 15, 22). Another two groups recalled the conc[Fill in the blank], actively at expan[Fill in the blank], intervals again without (days 1, 6, 16) or with a delay, in this case of 1 day (days 2, 7, 17). The fifth group served as a con[Fill in the blank], group. All of the groups under[Fill in the blank], a test at day 29 to ass[Fill in the blank], the fin[Fill in the blank], score; conseq[Fill in the blank], , the end point for all groups was the same. It was fou[Fill in the blank], that expanding retri[Fill in the blank], practice led to a signif[Fill in the blank], greater recall of facts at day 29 than recalling at steady inter[Fill in the blank], . Longer delay between ini[Fill in the blank], learning and recalling facts was associated with poorer rete[Fill in the blank], rate. Therefore, the group that lear[Fill in the blank], with expanding retrieval practice and no delay prec[Fill in the blank], the first asses[Fill in the blank], proved to have the best learning strategy.