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Summary: Communication and information sharing via social media platforms is a common and popular activity. The majority of existing studies indicate that social media usage has detrimental effects on learning and memory. However, it is an open question as to whether social media usage affects memory even after learning. To test this, healthy young adults learned and immediately recalled a vocabulary list. Subsequent to recall, participants either wakefully rested for 8 min or used social media for 8 min. A delayed recall test took place after the wakeful resting condition and the social media condition and again after 1 day. Our results showed that social media usage, compared with wakeful resting, had detrimental effects on memory performance over both retention intervals. We assume that social media usage interfered with memory consolidation of learned vocabularies and suggest that learners opt for wakeful resting over social media usage as a learning‐break activity. [ABSTRACT FROM AUTHOR]

Evidence primarily exists in adults that engaging in task‐related mental activity after new learning results in increased forgetting of learned information, compared with quietly resting in the minutes that follow learning, where less forgetting is observed. The current study investigated whether the beneficial effect of post‐encoding rest can be observed in children aged 13–14 years. Each child (N = 102) encoded two word lists. After the presentation and immediate recall of one word list, children wakefully rested for 10 min (resting condition), after presentation and immediate recall of the other word list, they solved visuo‐spatial problems for 10 min (problem‐solving condition). Seven days later, a surprise free recall test for the two word lists took place. Our results showed that children retained more words over 7 days in the resting condition than with the problem‐solving condition. Post‐hoc analyses revealed that the resting effect was a function of the number of words recollected during the immediate recall. Specifically, those children who recalled fewest words (≤ 13/30 words) in the immediate recall showed a significant resting effect. There was no resting effect in those who recalled a mid‐range (14–16/30 words) or a high number (>16/30 words) of words. These results provide new insights into the factors that influence memory in children, and suggest that a few minutes of wakeful rest benefits memory, relative to engaging in an ongoing task. Statement of contributionWhat is already known on this subject?Task‐related mental activity after encoding weakens memory retention more than wakeful resting.Beneficial effect of resting after encoding was found primarily in younger and older adults.What does this study add?We investigated children at the age of 13–14 years.8‐min post‐encoding wakeful resting supports memory retention over 7 days.Individuals differ in the impact of a brief period of wakeful resting after learning.Only children with lower immediate memory performances profited from wakeful resting. [ABSTRACT FROM AUTHOR]