Along with Florian Schmiedek and Ulman Lindenberger of the Max Planck Institute for Human Development in Berlin, ARC researcher Martin Lövdén has investigated day-to-day variability in cognitive performance in older (65-80 year-old) and younger (20-31 year-old) adults. The researchers found that although the older adults performed at a lower average level than younger adults, day-to-day performance was more consistent in the older group.
The article, “Keeping It Steady: Older Adults Perform More Consistently on Cognitive Tasks Than Younger Adults,” was published in the journal Psychological Science and has received a great deal of media attention.
Read more in English:
Press release at EurikaAlert: Young vs. old: Who performs more consistently?
Psych Central: Are Older Workers More Reliable?
Mail Online: Older workers are more reliable than younger ones and have ‘fewer bad days at the office’, study shows
Huffington Post: Older People Don’t Really Have ‘Good’ And ‘Bad’ Days For Memory, Study Finds
The Telegraph: Older workers more reliable, study finds 
Examiner: Seniors outperform young people on stability and reliability on cognitive tests
Fox News: Older workers have fewer senior moments
Money News: AARP survey: Many Older Workers Start Their Own Businesses, Thrive
Read more in German:
OnMedia: Senioren-Gehirn ist zuverlässiger
Agitano: Studie: Jung oder Alt – Wer zeigt die zuverlässigeren Leistungen?
Deutsch Türkische Nachrichten: Studie: Ältere Mitarbeiter sind produktiver
Berliner Morgenpost: Ältere Mitarbeiter sind oft zuverlässiger als junge
Deutsche Gesundheits Nachrichten: Ältere Mitarbeiter sind produktiver und zuverlässiger
Arbeitsschutz-Portal: Studie: Ältere Arbeitnehmer sind produktiver und zuverlässiger
DocCheck News: Geistige Leistungsfähigkeit: Im Alter zuverlässiger