Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:


Young and old: who performs more consistently?

A new study examining day-to-day variability in adults’ cognitive performance shows that older adults are more consistent than younger ones

How variable is our cognitive performance from one day to the next? Do older adults vary more in their performance than younger people?

Scientists from Berlin, Frankfurt, and Sweden have examined these questions in the COGITO Study. The Director at the Munich Center for the Economics of Aging at the Max Planck Institute for Social Law and Social Policy comments on what the findings mean with respect to the productivity of older adults in their working life.

Sometimes it’s just not your day: First you cannot remember where you put your car keys, and then you forget about an important meeting at work. On days like that, our memory seems to let us down. But is it really the case that we are cognitively fitter on some days than on others? Are there actually good and bad days for cognitive performance? Florian Schmiedek, Martin Lövdén, and Ulman Lindenberger examined this issue with the data set of the COGITO Study, an investigation conducted at the Max Planck Institute for Human Development in Berlin.

The scientists’ findings show that variability in cognitive performance does indeed exist. Our personal impression that a whole day is either good or bad, however, is often wrong. Most performance fluctuations occur within shorter periods of time. What seems like a good or bad day is often due to good or bad moments that do not make the whole day’s cognitive performance any better or worse than that of an average day. “True variability from day to day is relatively low”, says Florian Schmiedek, who planned and carried out the COGITO Study together with Lövdén and Lindenberger.

The results of a comparison between age groups were particularly surprising: In all nine cognitive tasks assessed, the older group actually showed less performance variability from day to day than the younger group. The older adults’ cognitive performance was thus more consistent across days. This picture remained unaltered when differences in average performance favouring the young were taken into account. “Further analyses indicate that the older adults’ higher consistency is due to learnt strategies to solve the task, a constantly high motivation level as well as a balanced daily routine and stable mood,” explains Florian Schmiedek.

The findings are of importance for the debate about older people’s potential in working life. “On balance, older employees’ productivity and reliability is higher than that of their younger colleagues,” says Axel Börsch-Supan, Director at the Munich Center for the Economics of Aging at the Max Planck Institute for Social Law and Social Policy in reaction to the findings of the COGITO Study. “One of our studies in the car production industry has shown that serious errors that are expensive to resolve are much less likely to be committed by older staff members than by their younger colleagues. Likewise, in other branches of industry that we have studied, one does not observe higher productivity among the younger relative to the older workers,” states the scientist, who studies productivity of the labour force in aging societies.

In the internationally unique COGITO Study, 101 adults aged 20 to 31 years and 103 adults aged 65 to 80 years worked on twelve different tasks on 100 days. The tasks tested their perceptual speed, episodic memory, and working memory. Repeating the tasks across 100 days enabled the researchers to assess the participants’ learning improvements as well as their day-to-day performance fluctuations and to compare the performance of the two age groups.


Prof. Dr. Ulman Lindenberger
Max Planck Institute for Human Development, Berlin
Phone: +49 30 82406-572
Fax: +49 30 82499-571
Email: seklindenberger@­
Prof. Axel Börsch-Supan, Ph.D.
Max Planck Institute for Social Law and Social Policy, München
Phone: +49 89 38602-357
Fax: +49 89 38602-390
Email: boersch-supan@­
Kerstin Skork
Public Relations
Max Planck Institute for Human Development, Berlin
Phone: +49 30 8240-6211
Email: skork@­
Original publication
Schmiedek, F., Lövdén, M., & Lindenberger, U.
Keeping it steady: Older adults perform more consistently on cognitive tasks than younger adults

Psychological Science. Advance online publication. doi: 10.1177/0956797613479611

Prof. Dr. Ulman Lindenberger | Max-Planck-Institute
Further information:

More articles from Social Sciences:

nachricht Illinois researchers researchers find tweeting in cities lower than expected
21.02.2018 | University of Illinois College of Engineering

nachricht Polluted air may pollute our morality
08.02.2018 | Association for Psychological Science

All articles from Social Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Researchers at Fraunhofer monitor re-entry of Chinese space station Tiangong-1

In just a few weeks from now, the Chinese space station Tiangong-1 will re-enter the Earth's atmosphere where it will to a large extent burn up. It is possible that some debris will reach the Earth's surface. Tiangong-1 is orbiting the Earth uncontrolled at a speed of approx. 29,000 km/h.Currently the prognosis relating to the time of impact currently lies within a window of several days. The scientists at Fraunhofer FHR have already been monitoring Tiangong-1 for a number of weeks with their TIRA system, one of the most powerful space observation radars in the world, with a view to supporting the German Space Situational Awareness Center and the ESA with their re-entry forecasts.

Following the loss of radio contact with Tiangong-1 in 2016 and due to the low orbital height, it is now inevitable that the Chinese space station will...

Im Focus: Alliance „OLED Licht Forum“ – Key partner for OLED lighting solutions

Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP, provider of research and development services for OLED lighting solutions, announces the founding of the “OLED Licht Forum” and presents latest OLED design and lighting solutions during light+building, from March 18th – 23rd, 2018 in Frankfurt a.M./Germany, at booth no. F91 in Hall 4.0.

They are united in their passion for OLED (organic light emitting diodes) lighting with all of its unique facets and application possibilities. Thus experts in...

Im Focus: Mars' oceans formed early, possibly aided by massive volcanic eruptions

Oceans formed before Tharsis and evolved together, shaping climate history of Mars

A new scenario seeking to explain how Mars' putative oceans came and went over the last 4 billion years implies that the oceans formed several hundred million...

Im Focus: Tiny implants for cells are functional in vivo

For the first time, an interdisciplinary team from the University of Basel has succeeded in integrating artificial organelles into the cells of live zebrafish embryos. This innovative approach using artificial organelles as cellular implants offers new potential in treating a range of diseases, as the authors report in an article published in Nature Communications.

In the cells of higher organisms, organelles such as the nucleus or mitochondria perform a range of complex functions necessary for life. In the networks of...

Im Focus: Locomotion control with photopigments

Researchers from Göttingen University discover additional function of opsins

Animal photoreceptors capture light with photopigments. Researchers from the University of Göttingen have now discovered that these photopigments fulfill an...

All Focus news of the innovation-report >>>



Industry & Economy
Event News

Virtual reality conference comes to Reutlingen

19.03.2018 | Event News

Ultrafast Wireless and Chip Design at the DATE Conference in Dresden

16.03.2018 | Event News

International Tinnitus Conference of the Tinnitus Research Initiative in Regensburg

13.03.2018 | Event News

Latest News

Natural enemies reduce pesticide use

21.03.2018 | Life Sciences

Make way for the mini flying machines

21.03.2018 | Life Sciences

Taming chaos: Calculating probability in complex systems

21.03.2018 | Physics and Astronomy

Science & Research
Overview of more VideoLinks >>>