Andreas Gerhardsson, doktorand. Foto: Niklas Björling
Andreas Gerhardsson, doktorand

Detta halvtidsseminarium äger rum onsdag den 19 september 2018, kl 14-16, i konferensrum 357, Frescati Hagväg 14, plan 3.

Granskare: Docent Petri Laukka (senior) och doktorand Marta Zakrzewska (junior).

Handledare: Professor Håkan Fischer, Psykologiska institutionen, samt Johanna Schwarz och Daniel Lundqvist.

Abstract

It is well known that sleep deprivation not only impacts cognitive functioning such as sustained attention and working memory (WM), but also alters emotional functioning. However, so far there is a lack of knowledge on how the interplay between emotion and cognitive functioning is affected by sleep deprivation.

The first two studies of my dissertation are from the same project. Young and older healthy adults were either sleep deprived for one night (in the lab) or slept as usual in their homes. The next day they performed an emotional WM n-back (n = 1 & 3) task containing positive, neutral and negative pictures.

In Study 1, we investigated the young adult participants (18-30 years) and found that the sleep deprived group in general had lower accuracy. On the other hand, reaction time was not slower after sleep deprivation. In fact, sleep deprived, but not the rested control individuals, were faster to respond to positive and slower to respond to negative, compared with neutral pictures suggesting that emotion influences cognition after sleep deprivation.

It is well established that older adults display a positivity effect, with better performance on positive stimuli. Yet, recent research highlights that this positivity effect is possibly attenuated by stress or cognitive demand. Therefore, in Study 2 we focused on older adults (60-72 years) and the aim was to test whether also sleep deprivation, which is commonly experienced among this group could alter the positivity effect. Results showed that the positivity effect was present and intact after sleep deprivation. Moreover, working memory performance was similar between the groups, confirming previous reports that healthy older adults are less vulnerable to short term sleep deprivation.

In Study 3, the aim is to investigate if sleep deprivation affects resting state transient network fluctuations using magnetoencephalography (MEG), and if that can predict emotion processing.

Läs mer om Andreas Gerhardsson.

Avdelningen för biologisk psykologi ansvarar för dagens seminarium.

Om Allmänna seminarieserien

Institutionens forskningsavdelningar samarbetar i Allmänna seminarieserien, där nationella och internationella forskare inbjuds att tala om aktuella forskningsämnen. Seminarierna äger rum onsdagar kl 14-15 i rum 357 om annat ej anges. Extraseminarier kan förekomma på andra dagar och tider, bl a halvtidsseminarier i forskarutbildningen.

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