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Håkan Fischer Foto: Psykologiska institutionen/HD

Håkan Fischer

Professor, prefekt

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Arbetar vid Psykologiska institutionen
Telefon 08-16 23 57
E-post hakan.fischer@psychology.su.se
Besöksadress Frescati hagväg 14
Rum 136
Postadress Psykologiska institutionen 106 91 Stockholm

Om mig

Är professor i Humanbiologisk psykologi och sedan första augusti 2015 även prefekt vid Psykologiska institutionen, Stockholms universitet. Är även docent vid Karolinska Institutet och anknyten till Aging Research Center, Karolinska Institutet.

Jag handleder för närvarande nio doktorander. En postdoktor ingår också i forskargruppen. Sedan 2002 har jag regelbundet fått finansiering som huvudansvarig forskare för olika projekt främst från Vetenskapsrådet, men även från STINT, Riksbankens Jubileumsfond, och Konung Gustav V:s and Drottning Victorias Stiftelse.

Undervisning

Jag ger för närvarande bara enstaka föreläsningar på institutionen med fokus på Biologiska psykologi.

Forskning

Mitt primära forskningsområde är individuella skillnader i den neurobiologiska basen för emotionellt informationsprocessande, med särskild inriktning på åldrande och könsskillnader. Aktuella forskningslinjer här är:

  1. Utvecklande av artificiell intelligens (AI) som korrekt kan avläsa och tolka emotionella uttryck i ansikten och röster tillsammans med forskare på Psykologiska institutionen, SU, University of Florida, Kungliga Tekniska högskolan och Research Institutes of Sweden (RISE).
  2. Effekten av oxytocin på socioemotionellt processande och dess neurobiologiska bas hos yngre och äldre personer tillsammans med forskare vid University of Florida och Göteborgs universitet,
  3. Studiet av individuella skillnader i igenkänning av socioemotionell information samt träning av förmågan att detektera socioemotionell information.

Mitt vetenskapliga arbete har hittills resulterat i 110+ vetenskapliga artiklar som publicerats eller skickats in till internationella vetenskapliga tidskrifter. Mina publikationer har citerats mer än 8900 gånger i internationella vetenskapliga tidskrifter och jag har ett h-index på 46 samt ett i10-index på 88. Jag har också tjänstgjort vid ett flertal halvtidskontroller och doktorsavhandlingskommittéer samt varit "reviewer" för ett flertal internationella vetenskapliga tidskrifter

I min forskning använder jag framför allt funktionell magnetresonanstomografi (fMRI), positronemissionstomografi (PET) och functional near-infrared optical brain imaging (FNIRS) för att studera hjärnans funktion, samt strukturell MRI (DTI och perfusion) för att studera hjärnans vit- och gråsubstans. Jag samarbetar både nationellt och internationellt med andra forskare och deltar i pågående projekt i Sverige, Tyskland och USA.

Läs mer om Fischers forskningslabb.

Läs mer på min sida på Research Gate.

Manuscripts under review and under revision

Laukka, P., Bänziger, T., Cortes, D.S. Tornberg, C., Israelsson, A., Scherer, K.R., Fischer, H. (under review). Investigating individual differences in emotion recognition ability using the ERAM test.

Cortes, D.S., Tornberg, C., Bänziger, T., Elfenbein, H.A., Fischer, H., Laukka, P. (under review). Effects of aging on recognition of both positive and negative emotions from dynamic multimodal expressions and vocalizations.

Syrjänen, E., Fischer, H., Liuzza, M.T., Lindholm Öjmyr, T., & Olofsson, J. (Under review). A review of the effects of valanced odors on face perception and evaluation.https://psyarxiv.com/

 

Publikationer

I urval från Stockholms universitets publikationsdatabas
  • 2020. Tian Lin (et al.). Cognition and Emotion 34 (5), 875-889

    Face attractiveness can influence memory for previously seen faces. This effect has been shown to differ for young and older perceivers. Two parallel studies examined the moderation of both the age of the face and the age of the perceiver on the relationship between facial attractiveness and face memory. Study 1 comprised 29 young and 31 older participants; Study 2 comprised 25 young and 24 older participants. In both studies, participants completed an incidental face encoding and a surprise old/new recognition test with young and older faces that varied in face attractiveness. Face attractiveness affected memory for young but not older faces. In addition, young but not older perceivers showed a linear effect of facial attractiveness on memory for young faces, while both young and older perceivers showed a quadratic effect on memory for young faces. These findings extend previous work by demonstrating that the effect of facial attractiveness on face memory is a function of both the age of the perceiver and the age of the face. Factors that could account for such moderations of face and perceiver age on the associations between face attractiveness and face memory are discussed (e.g. age differences in social goals and face similarity/distinctiveness).

  • Diana Cortes S. (et al.).

    Age-related differences in emotion recognition have predominantly been investigated usingstatic pictures of facial expressions. Previous studies have also mainly studied recognition ofnegative emotions, and positive emotions beyond happiness have rarely been included. Thecurrent study instead used dynamic facial and vocal stimuli, and included a wider than usualrange of positive emotions. In Task 1, younger and older adults were tested for their abilities torecognize 12 positive and negative emotions from brief video recordings presented in visual,auditory and multimodal blocks. Task 2 assessed recognition of 18 positive and negativeemotions conveyed by non-linguistic vocalizations (e.g., laughter, sobs, and sighs). Resultsfrom both tasks showed that younger adults had higher overall recognition rates than olderadults. In Task 1, significant age-related differences (younger > older) were only observed inthe auditory condition, and for relief, anger, and irritation. In Task 2, significant groupdifferences were instead observed for most of the emotions. Overall, results indicate thatrecognition of both positive and negative emotions show age-related differences. This suggeststhat the age-related positivity effect in emotion recognition may become less evident whendynamic emotional stimuli are used and happiness is not the only positive emotion under study.

  • 2020. Monroe P. Turner (et al.). NeuroImage 206

    Facial recognition ability declines in adult aging, but the neural basis for this decline remains unknown. Cortical areas involved in face recognition exhibit lower dopamine (DA) receptor availability and lower blood-oxygen-level-dependent (BOLD) signal during task performance with advancing adult age. We hypothesized that changes in the relationship between these two neural systems are related to age differences in face-recognition ability. To test this hypothesis, we leveraged positron emission tomography (PET) and functional magnetic resonance imaging (fMRI) to measure D1 receptor binding potential (BPND) and BOLD signal during face-recognition performance. Twenty younger and 20 older participants performed a face-recognition task during fMRI scanning. Face recognition accuracy was lower in older than in younger adults, as were D1 BPND and BOLD signal across the brain. Using linear regression, significant relationships between DA and BOLD were found in both age-groups in face-processing regions. Interestingly, although the relationship was positive in younger adults, it was negative in older adults (i.e., as D1 BPND decreased, BOLD signal increased). Ratios of BOLD:D1 BPND were calculated and relationships to face-recognition performance were tested. Multiple linear regression revealed a significant Group x BOLD:D1 BPND Ratio interaction. These results suggest that, in the healthy system, synchrony between neurotransmitter (DA) and hemodynamic (BOLD) systems optimizes the level of BOLD activation evoked for a given DA input (i.e., the gain parameter of the DA input-neural activation function), facilitating task performance. In the aged system, however, desynchronization between these brain systems would reduce the gain parameter of this function, adversely impacting task performance and contributing to reduced face recognition in older adults.

  • 2019. Diana S. Cortes (et al.). Psychology and Aging 34 (5), 686-697

    In everyday life throughout the life span, people frequently evaluate faces to obtain information crucial for social interactions. We investigated age-related differences in judgments of a wide range of social attributes based on facial appearance. Seventy-one younger and 60 older participants rated 196 computer-generated faces that systematically varied in facial features such as shape and reflectance to convey different intensity levels of seven social attributes (i.e., attractiveness, competence, dominance, extraversion, likeability, threat, and trustworthiness). Older compared to younger participants consistently gave higher attractiveness ratings to faces representing both high and low levels of attractiveness. Older participants were also less sensitive to the likeability of faces and tended to evaluate faces representing low likeability as more likable. The age groups did, however, not differ substantially in their evaluations of the other social attributes. Results are in line with previous research showing that aging is associated with preference toward positive and away from negative information and extend this positivity effect to social perception of faces.

  • 2019. Kristoffer N. T. Månsson (et al.). Cerebral Cortex

    Measuring brain morphology with non-invasive structural magnetic resonance imaging is common practice, and can be used to investigate neuroplasticity. Brain morphology changes have been reported over the course of weeks, days, and hours in both animals and humans. If such short-term changes occur even faster, rapid morphological changes while being scanned could have important implications. In a randomized within-subject study on 47 healthy individuals, two high-resolution T1-weighted anatomical images were acquired (á 263 s) per individual. The images were acquired during passive viewing of pictures or a fixation cross. Two common pipelines for analyzing brain images were used: voxel-based morphometry on gray matter (GM) volume and surface-based cortical thickness. We found that the measures of both GM volume and cortical thickness showed increases in the visual cortex while viewing pictures relative to a fixation cross. The increase was distributed across the two hemispheres and significant at a corrected level. Thus, brain morphology enlargements were detected in less than 263 s. Neuroplasticity is a far more dynamic process than previously shown, suggesting that individuals’ current mental state affects indices of brain morphology. This needs to be taken into account in future morphology studies and in everyday clinical practice.

  • 2019. Andreas Gerhardsson (et al.). Frontiers in Psychology 10

    Background: Older adults perform better in tasks which include positive stimuli, referred to as the positivity effect. However, recent research suggests that the positivity effect could be attenuated when additional challenges such as stress or cognitive demands are introduced. Moreover, it is well established that older adults are relatively resilient to many of the adverse effects of sleep deprivation. Our aim was to investigate if the positivity effect in older adults is affected by one night of total sleep deprivation using an emotional working memory task.

    Methods: A healthy sample of 48 older adults (60-72 years) was either sleep deprived for one night (n = 24) or had a normal night's sleep (n = 24). They performed an emotional working memory n-back (n = 1 and 3) task containing positive, negative and neutral pictures.

    Results: Performance in terms of accuracy and reaction times was best for positive stimuli and worst for negative stimuli. This positivity effect was not altered by sleep deprivation. Results also showed that, despite significantly increased sleepiness, there was no effect of sleep deprivation on working memory performance. A working memory load x valence interaction on the reaction times revealed that the beneficial effect of positive stimuli was only present in the 1-back condition.

    Conclusion: While the positivity effect and general working memory abilities in older adults are intact after one night of sleep deprivation, increased cognitive demand attenuates the positivity effect on working memory speed.

  • 2019. Andreas Gerhardsson (et al.). Journal of Sleep Research 28 (1)

    The emotional dysregulation and impaired working memory found after sleep loss can have severe implications for our daily functioning. Considering the intertwined relationship between emotion and cognition in stimuli processing, there could be further implications of sleep deprivation in high‐complex emotional situations. Although studied separately, this interaction between emotion and cognitive processes has been neglected in sleep research. The aim of the present study was to investigate the effect of 1 night of sleep deprivation on emotional working memory. Sixty‐one healthy participants (mean age: 23.4 years) were either sleep deprived for 1 night (n = 30) or had a normal night’s sleep (n = 31). They performed an N‐back task with two levels of working memory load (1‐back and 3‐back) using positive, neutral and negative picture scenes. Sleep deprivation, compared with full night sleep, impaired emotional working memory accuracy, but not reaction times. The sleep‐deprived participants, but not the controls, responded faster to positive than to negative and neutral pictures. The effect of sleep deprivation was similar for both high and low working memory loads. The results showed that although detrimental in terms of accuracy, sleep deprivation did not impair working memory speed. In fact, our findings indicate that positive stimuli may facilitate working memory processing speed after sleep deprivation.

Visa alla publikationer av Håkan Fischer vid Stockholms universitet

Senast uppdaterad: 3 november 2020

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