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Auflistung Publikationen im Open Access gefördert durch die UB nach Auflistung nach DDC "ddc:150"
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Item A comparison of the temporal and spatial properties of trans-saccadic perceptual recalibration and saccadic adaptation(2020) Valsecchi, Matteo; Cassanello, Carlos Raul; Herwig, Arvid; Rolfs, Martin; Gegenfurtner, Karl R.Item A dataset for evaluating one-shot categorization of novel object classes(2020) Morgenstern, Yaniv; Schmidt, Filipp; Fleming, Roland W.Item A feminist economics perspective on the agroecology-food and nutrition security nexus(2022) Ume, Chukwuma; Nuppenau, Ernst-August; Domptail, Stephanie EileenItem A Systematic Comparison of Perceptual Performance in Softness Discrimination with Different Fingers(2020) Zoeller, Aaron C.; Drewing, KnutItem A Systematic Review of Momentary Assessment Designs for Mood and Anxiety Symptoms(2021) Hall, Mila; Scherner, Paloma V.; Kreidel, Yannic; Rubel, JulianItem Activation of the parieto-premotor network is associated with vivid motor imagery : A parametric fMRI study(2011) Lorey, Britta; Pilgramm, Sebastian; Bischoff, Matthias; Stark, Rudolf; Vaitl, Dieter; Kindermann, Stefan; Munzert, Jörn; Zentgraf, KarenThe present study examined the neural basis of vivid motor imagery with parametrical functional magnetic resonance imaging. 22 participants performed motor imagery (MI) of six different right-hand movements that differed in terms of pointing accuracy needs and object involvement, i.e., either none, two big or two small squares had to be pointed at in alternation either with or without an object grasped with the fingers. After each imagery trial, they rated the perceived vividness of motor imagery on a 7-point scale. Results showed that increased perceived imagery vividness was parametrically associated with increasing neural activation within the left putamen, the left premotor cortex (PMC), the posterior parietal cortex of the left hemisphere, the left primary motor cortex, the left somatosensory cortex, and the left cerebellum. Within the right hemisphere, activation was found within the right cerebellum, the right putamen, and the right PMC. It is concluded that the perceived vividness of MI is parametrically associated with neural activity within sensorimotor areas. The results corroborate the hypothesis that MI is an outcome of neural computations based on movement representations located within motor areas.Item Active Haptic Exploration of Softness: Indentation Force Is Systematically Related to Prediction, Sensation and Motivation(2018) Lezkan, Alexandra; Metzger, Anna; Drewing, KnutActive finger movements play a crucial role in natural haptic perception. For the perception of different haptic properties people use different well-chosen movement schemes (Lederman and Klatzky, 1987). The haptic property of softness is stereotypically judged by repeatedly pressing one´s finger against an objects´ surface, actively indenting the object. It has been shown that people adjust the peak indentation forces of their pressing movements to the expected stimulus´ softness in order to improve perception (Kaim and Drewing, 2011). Here, we aim to clarify the mechanisms underlying such adjustments. We disentangle how people modulate executed peak indentation forces depending on predictive vs. sensory signals to softness, and investigate the influence of the participants´ motivational state on movement adjustments. In Experiment 1, participants performed a two alternative forced-choice (2AFC) softness discrimination task for stimulus pairs from one of four softness categories. We manipulated the predictability of the softness category. Either all stimuli of the same category were presented in a blocked fashion, which allowed predicting the softness category of the upcoming pair (predictive signals high), or stimuli from different categories were randomly intermixed, which made prediction impossible (predictive signals low). Sensory signals to softness category of the two stimuli in a pair are gathered during exploration. We contrasted the first indentation (sensory signals low) and last indentation (sensory signals high) in order to examine the effect of sensory signals. The results demonstrate that participants systematically apply lower forces when softer objects (as compared to harder objects) are indicated by predictive signals. Notably, sensory signals seemed to be not as relevant as predictive signals. However, in Experiment 2, we manipulated participant motivation by introducing rewards for good performance, and showed that the use of sensory information for movement adjustments can be fostered by high motivation. Overall, the present study demonstrates that exploratory movements are adjusted to the actual perceptual situation and that in the process of fine-tuning, closed- and open-loop mechanisms interact, with varying contributions depending on the observer´s motivation.Item Acute hunger does not always undermine prosociality(2019) Häusser, Jan A.; Stahlecker, Christina; Mojzisch, Andreas; Leder, Johannes; Van Lange, Paul A. M.; Faber, Nadira S.Item Acute responsivity of the serotonergic system to S-citalopram and positive emotionality : the moderating role of the 5-HTTLPR(2013) Wielpuetz, Catrin; Kuepper, Yvonne; Grant, Phillip; Aisha, J; Munk, L.; Hennig, JuergenAccording to the idea that the central serotonergic system has a modulatory functionon behavior and personality in general, we aimed to highlight its association to habitual positive emotionality. In a placebo-controlled double-blind and randomized cross-over neuroendocrine challenge design (n = 72 healthy males) we investigated the association of the central serotonergic responsivity, 5-HTTLPR-genotype as well as their combined effects on positive emotionality. Regression analyses revealed an involvement of the serotonergic system in positive emotionality. There was, however, no direct association between positive emotionality and cortisol responses to S-citalopram; rather5-HTTLPR-genotype showed an association (p < 0.05). That is, positive emotionality scores increased with the number of s-alleles carried by the individuals. Most notable was the moderating role of 5-HTTLPR-genotype (p < 0.05) on the association between acute serotonergic responsivity and positive emotionality. Indeed, this association was only found in ss-homozygotes, in which the acute responsivity of the serotonergic system additionally seems to contribute to the level of positive emotionality (r = 0.70, p < 0.05). The findings correspond to previous research demonstrating that the 5-HTTLPR is not only involved in the negative-emotional aspects of behavior and temperament, but is associated, moreover, with positive affectivity supporting the assumption of its valence-neutrality. In addition, our data are in line with the idea of possible influences of the 5-HTTLPR-genotype on early neuronal development. They also indicate the need for further studies in order to clearly elucidate the role of the serotonergic system and itssubcomponents in the regulation of positive emotionality.Item Age effects on saccadic adaptation: Evidence from different paradigms reveals specific vulnerabilities(2017) Huang, Jing; Gegenfurtner, Karl R.; Schütz, Alexander C.; Billino, JuttaSaccadic eye movements provide an opportunity to study closely interwoven perceptual, motor, and cognitive changes during aging. Here, we investigated age effects on different mechanisms of saccadic plasticity. We compared age effects in two different adaptation paradigms that tap into low- and high-level adaptation processes. A total of 27 senior adults and 25 young adults participated in our experiments. In our first experiment, we elicited adaptation by a double-step paradigm, which is designed to trigger primarily low-level, gradual motor adaptation. Age groups showed equivalent adaptation of saccadic gain. In our second experiment, adaptation was induced by a perceptual task that emphasizes high-level, fast processes. We consistently found no evidence for age-related differences in low-level adaptation; however, the fast adaptation response was significantly more pronounced in the young adult group. We conclude that low-level motor adaptation is robust during healthy aging but that high-level contributions, presumably involving executive strategies, are subject to age-related decline. Our findings emphasize the need to differentiate between specific aging processes in order to understand functional decline and stability across the adult life span.Item Age effects on saccadic suppression of luminance and color(2021) Braun, Doris I.; Schütz, Alexander Christian; Gegenfurtner, Karl R.Item Age effects on sensorimotor predictions: What drives increased tactile suppression during reaching?(2019) Klever, Lena; Voudouris, Dimitris; Fiehler, Katja; Billino, JuttaItem Age-related differences in visual confidence are driven by individual differences in cognitive control capacities(2022) Klever, Lena; Mamassian, Pascal; Billino, JuttaItem Alike and different: Associations between orthorexic eating behaviors and exercise addiction(2021) Strahler, Jana; Wachten, Hanna; Stark, Rudolf; Walter, BertramItem Alpha-2 Adrenoreceptor Antagonist Yohimbine Potentiates Consolidation of Conditioned Fear(2022) Sperl, Matthias F. J.; Panitz, Christian; Skoluda, Nadine; Nater, Urs M.; Pizzagalli, Diego A.; Hermann, Christiane; Mueller, Erik M.Item Amygdala and nucleus accumbens involvement in appetitive extinction(2020) Kruse, Onno; Klein, Sanja; Tapia León, Isabell; Stark, Rudolf; Klucken, TimItem Anticipatory grasping control modulates somatosensory perception(2019) Voudouris, Dimitris; Broda, Maximilian Davide; Fiehler, KatjaSomatosensory perception is hampered on the moving limb during a goal-directed movement. This somatosensory suppression is mostly attributed to a forward model that predicts future states of the system based on the established motor command. Here, we examined whether and how this suppression is modulated by the predictability of object features important for controlling a grasping movement. Participants reached to grasp an object between thumb and index finger and then lifted it as straight as possible. Objects with symmetric or asymmetric mass distributions were presented either in a blocked or random manner, so that the object´s mass distribution could be anticipated or not. At the moment of object contact, a brief vibrotactile stimulus of varying intensities was presented on the dorsal part of the moving index finger. Participants had to report whether they detected the stimulus. When the object´s mass distribution was predictable, contact points with the object were modulated to the object´s centre of mass. This modulation contributed to a minimized resultant object roll during lifting. When the object´s mass distribution was unpredictable, participants chose a default grasping configuration, resulting in greater object roll for asymmetric mass distributions. Somatosensory perception was hampered when grasping both types of objects compared to baseline (no-movement). Importantly, somatosensory suppression was stronger when participants could predict the object´s mass distribution. We suggest that the strength of somatosensory suppression depends on the predictability of movement-relevant object features.Item Area Dominates Edge in Pointillistic Colour(2018) Koenderink, Jan; van Doorn, Andrea; Gegenfurtner, KarlIn Pointillism and Divisionism, artists moved from tonal to chromatic palettes, as Impressionism did before them, and relied on what is often called optical mixture instead of stirring paints together. The so-called optical mixture is actually not an optical mixture, but a mental blend, because the texture of the paint marks is used as a means to stress the picture plane. The touches are intended to remain separately visible. These techniques require novel methods of colour description that have to depart from standard colorimetric conventions. We investigate the distinctiveness of transitions between regions as defined through such artistic techniques. We find that the pointillist edges are not primarily defined by luminance contrast but are achieved in almost purely chromatic ways. A very simple rule suffices to predict transition distinctiveness for pairs of cardinal colours (yellow, green, cyan, blue, magenta, and red); it is simply distance along the colour circle or in the RGB cube. Distinctiveness of partition depends mainly on the colours of the regions, not the sharpness of the transition.Item The Association of the 24 Hour Distribution of Time Spent in Physical Activity, Work, and Sleep with Emotional Exhaustion(2018) Janurek, Janina; Abdel Hadi, Sascha; Mojzisch, Andreas; Häusser, Jan AlexanderPrevious research identified time spent in physical activity, sleeping, and working as predictors of emotional exhaustion. However, this research did not take into account the interdependence of these time-use components. Since daily time is limited to 24 h, time spent in one specific activity (e.g., sleep) cannot be used for any other activity (e.g., physical activity). We conducted a one-week daily sampling study to assess the compositional effects of physical activity, sleep, and work on emotional exhaustion. Since the sample consisted of 104 undergraduate students, work was operationalized as study time. Participants wore accelerometers for one week continuously to assess sleep and physical activity. Also, they filled in questionnaires on study time and emotional exhaustion every morning. Multilevel and compositional data analyses were conducted. The multilevel analysis revealed significant between- (p = 0.012) and within-level (p < 0.001) associations of study time with emotional exhaustion. The compositional approach showed that time spent in physical activity was negatively related to emotional exhaustion (p = 0.007), whereas time spent studying was positively related to emotional exhaustion (p = 0.003), relative to the remaining two time-use components. In conclusion, our results show that emotional exhaustion is not only associated with work-related factors, but also with off-job physical activity.Item Associations between musical abilities and precursors of reading in preschool aged children(2015) Degé, Franziska; Kubicek, Claudia; Schwarzer, GudrunThe association between music and language, in particular, the overlap in their processing results in the possibility to use one domain for the enhancement of the other. Especially in the preschool years music may be a valuable tool to train language abilities (e.g., precursors of reading). Therefore, detailed knowledge about associations between musical abilities and precursors of reading can be of great use for designing future music intervention studies that target language-related abilities. Hence, the present study investigated the association between music perception as well as music production and precursors of reading. Thereby, not only phonological awareness, the mostly studied precursor of reading, was investigated, but also other precursors were examined. We assessed musical abilities (production and perception) and precursors of reading (phonological awareness, working memory, and rapid retrieval from long-term memory) in 55 preschoolers (27 boys). Fluid intelligence was measured and controlled in the analyses. Results showed that phonological awareness, working memory, and rapid retrieval from long-term memory were related to music perception as well as to music production. Our data suggest that several precursors of reading were associated with music perception as well as music production.