It is generally assumed that someone's affective state can be correctly detected and interpreted by other people, nowadays even by computer algorithms, in their writing. However, it is unclear ...whether these perceptions match the actual experience and communicative intention of the author. Therefore, we investigated the relation between affect expression and perception in text in a two-part study. In Part 1, participants (authors) wrote about emotional experiences according to four combinations of two appraisals (High/Low Pleasantness, High/Low Control), rated the valence of each text, and annotated words using 22 emotions. In Part 2, another group of participants (readers) rated and annotated the same texts. We also compare the human evaluations to those provided by computerized text analysis. Results show that valence differed across conditions and that authors rated and annotated their texts differently than readers. Although the automatic analysis detected levels of positivity and negativity across conditions similar to human valence ratings, it relied on fewer and different words to do so. We discuss implications for affective science and automatic sentiment analysis.
Our affective state is influenced by daily events and our interactions with other people, which, in turn, can affect the way we communicate. In two studies, we investigated the influence of ...experiencing success or failure in a foosball (table soccer) game on participants' affective state and how this in turn influenced the way they report on the game itself. Winning or losing a match can further influence how they view their own team (compared to the opponent), which may also impact how they report on the match. In Study 1, we explored this by having participants play foosball matches in two dyads. They subsequently reported their affective state and team cohesiveness, and wrote two match reports, one from their own and one from their opponent's perspective. Indeed, while the game generally improved participants' moods, especially winning made them happier and more excited and losing made them more dejected, both in questionnaires and in the reports, which were analyzed with a word count tool. Study 2 experimentally investigated the effect of affective state on focus and distancing behavior. After the match, participants chose between preselected sentences (from Study 1) that differed in focus (mentioning the own vs. other team) or distancing (using we vs. the team name). Results show an effect for focus: winning participants preferred sentences that described their own performance positively while losing participants chose sentences that praised their opponent over negative sentences about themselves. No effect of distancing in pronoun use was found: winning and losing participants equally preferred the use of we vs. the use of their own team name. We discuss the implications of our findings with regard to models of language production, the self-serving bias, and the use of games to induce emotions in a natural way.
Celotno besedilo
Dostopno za:
DOBA, IZUM, KILJ, NUK, PILJ, PNG, SAZU, SIK, UILJ, UKNU, UL, UM, UPUK
A new approach to probabilistic projections of regional climate change is introduced. It builds on the already established quasi-linear relation between global-mean temperature and regional climate ...change found in atmosphere–ocean general circulation models (AOGCMs). The new approach simultaneously 1) takes correlations between temperature- and precipitation-related uncertainty distributions into account, 2) enables the inclusion of predictors other than global-mean temperature, and 3) checks for the interscenario and interrun variability of the scaling relationships. This study tests the effectiveness of SOₓand black carbon emissions and greenhouse gas forcings as additional predictors of precipitation changes. The future precipitation response is found to deviate substantially from the linear relationship with global-mean temperature change in some regions; thereby, the two main limitations of a simple linear scaling approach, namely having to rely on exogenous aerosol experiments (or ignoring their regional effect), and ignoring changes in scaling coefficients when approaching equilibriumconditions, are addressed. The additional predictors can markedly improve the emulation of AOGCM simulations. In some regions, variations in hydrological sensitivity (the percentage change of precipitation per degree of warming) across different scenarios can be reduced by more than 50%. Coupled to probabilistic projections of global-mean temperatures and greenhouse gas forcings, bidimensional distributions of regional temperature and precipitation changes accounting formultiple uncertainties are derived. Based on 20 Fourth Assessment Report AOGCMs (AR4 AOGCMs), probabilistic projections are provided for two representative concentration pathway (RCP) scenarios and 31 world regions (online database at www.pik-potsdam.de/primap/regional_temp_and_precip). As an example application of the projections for climate adaptation and vulnerability studies, future changes in the surface mass balance of the Greenland Ice Sheet are computed.
Celotno besedilo
Dostopno za:
BFBNIB, DOBA, IZUM, KILJ, NUK, PILJ, PNG, SAZU, SIK, UILJ, UKNU, UL, UM, UPUK
Synaptic refinement via the elimination of inappropriate synapses and strengthening of appropriate ones is crucially important for the establishment of specific, topographic neural circuits. The ...mechanisms driving these processes are poorly understood, particularly concerning inhibitory projections. Here, we address the refinement of an inhibitory topographic projection in the auditory brainstem in functional and anatomical mapping studies involving patch-clamp recordings in combination with minimal and maximal stimulation, caged glutamate photolysis, and single axon tracing. We demonstrate a crucial dependency of the refinement on Ca(V)1.3 calcium channels: Ca(V)1.3(-/-) mice displayed virtually no elimination of projections up to hearing onset. Furthermore, strengthening was strongly impaired, in line with a reduced number of axonal boutons. The mediolateral topography was less precise and the shift from a mixed GABA/glycinergic to a purely glycinergic transmission before hearing onset did not occur. Together, our findings provide evidence for a Ca(V)1.3-dependent mechanism through which both inhibitory circuit formation and determination of the neurotransmitter phenotype are achieved.
Within the Ca(v)1 family of voltage-gated calcium channels, Ca(v)1.2 and Ca(v)1.3 channels are the predominant subtypes in the brain. Whereas specific functions for each subtype were described in the ...adult brain, their role in brain development is poorly understood. Here we assess the role of Ca(v)1.3 subunits in the activity-dependent development of the auditory brainstem. We used Ca(v)1.3-deficient (Ca(v)1.3(-/-)) mice because these mice lack cochlea-driven activity that deprives the auditory centers from peripheral input. We found a drastically reduced volume in all auditory brainstem centers (range 25-59%, total 35%), which was manifest before hearing onset. A reduction was not obvious outside the auditory system. The lateral superior olive (LSO) was strikingly malformed in Ca(v)1.3(-/-) mice and had fewer neurons (1/3 less). The remaining LSO neurons displayed normal dendritic trees and received functional glutamatergic input, yet they fired action potentials predominantly with a multiple pattern upon depolarization, in contrast to the single firing pattern prevalent in controls. The latter finding appears to be due to a reduction of dendrototoxin-sensitive potassium conductances, presumably mediated through the K(v)1.2 subtype. Fura2 imaging provided evidence for functional Ca(v)1.3 channels in the LSO of wild-type mice. Our results imply that Ca(v)1.3 channels are indispensable for the development of the central auditory system. We propose that the unique LSO phenotype in Ca(v)1.3(-/-) mice, which hitherto was not described in other hereditary deafness models, is caused by the synergistic contribution of two factors: on-site loss of Ca(v)1.3 channels in the neurons plus lack of peripheral input.
In this article, we explore whether and how linguistic and pragmatic context can change individual word valence and emotionality in two parts. In the first part, we investigate whether sentence ...contexts retrieved from a domain-specific corpus (soccer) bias individual word affect. We then examine whether word valence with and without context accurately indicates sentence valence. In the second part, we compare word ratings from the first part to four different existing affective lexicons, with different levels of sensitivity to semantic and pragmatic context, and examine their accuracy in determining sentence valence. Results show a significant difference between words with and without context, the former more accurate in determining sentence valence than the latter. The preexisting lexicons were found to be similar to the individual word ratings collected in the first part of the study, with human-evaluated, context-sensitive lexicons being the most accurate in determining sentence valence. We discuss implications for emotion theory and bag-of-words approaches to sentiment analysis.
This paper introduces a new corpus of paired football match reports, the Multilingual Emotional Football Corpus, (MEmoFC), which has been manually collected from English, German, and Dutch websites ...of individual football clubs to investigate the way different emotional states (e.g. happiness for winning and disappointment for losing) are realized in written language. In addition to the reports, it also contains the statistics for the selected matches. MEmoFC is a corpus consisting of comparable subcorpora since the authors of the texts report on the same event from two different perspectives—the winner’s and the loser’s side, and from an arguably more neutral perspective in tied matches. We demonstrate how the corpus can be used to investigate the influence of affect on the reports through different approaches and illustrate how game outcome influences (1) references to the own team and the opponent, and (2) the use of positive and negative emotion terms in the different languages. The MEmoFC corpus, together with the analyzed aspects of emotional language will open up new approaches for targeted automatic generation of texts.
Many of the major greenhouse gas emitting countries have planned and/or implemented domestic mitigation policies, such as carbon taxes, feed-in tariffs, or standards. This study analyses whether the ...most effective national climate and energy policies are sufficient to stay on track for meeting the emission reduction proposals (pledges) that countries made for 2020. The analysis shows that domestic policies of India, China and Russia are projected to lead to lower emission levels than the pledged levels. Australia's and the EU's nationally legally binding policy framework is likely to deliver their unconditional pledges, but not the conditional ones. The situation is rather unclear for Japan, South Korea, Brazil and Indonesia. We project that policies of Canada and the USA will reduce 2020 emission levels, but additional policies are probably needed to deliver their pledges in full. The analysis also shows that countries are implementing policies or targets in various areas to a varying degree: all major countries have set renewable energy targets; many have recently implemented efficiency standards for cars, and new emission trading systems are emerging.
•Many countries have pledged to reduce their greenhouse gas emissions by 2020.•There are upward revisions of greenhouse gas emission projections in many developing countries.•Higher emissions expected from pledged mitigation action plans of developing countries.•Achieving the 2°C climate goal becomes more difficult.•The expected emission levels resulting from the pledges are surrounded with large uncertainties.
Synaptic refinement via the elimination of inappropriate synapses and strengthening of appropriate ones is crucially important for the establishment of specific, topographic neural circuits. The ...mechanisms driving these processes are poorly understood, particularly concerning inhibitory projections. Here, we address the refinement of an inhibitory topographic projection in the auditory brainstem in functional and anatomical mapping studies involving patch-clamp recordings in combination with minimal and maximal stimulation, caged glutamate photolysis, and single axon tracing. We demonstrate a crucial dependency of the refinement on Ca
V
1.3 calcium channels:
Ca
V
1.3
−/−
mice displayed virtually no elimination of projections up to hearing onset. Furthermore, strengthening was strongly impaired, in line with a reduced number of axonal boutons. The mediolateral topography was less precise and the shift from a mixed GABA/glycinergic to a purely glycinergic transmission before hearing onset did not occur. Together, our findings provide evidence for a Ca
V
1.3-dependent mechanism through which both inhibitory circuit formation and determination of the neurotransmitter phenotype are achieved.
Within the Ca
v
1 family of voltage-gated calcium channels, Ca
v
1.2 and Ca
v
1.3 channels are the predominant subtypes in the brain. Whereas specific functions for each subtype were described in the ...adult brain, their role in brain development is poorly understood. Here we assess the role of Ca
v
1.3 subunits in the activity-dependent development of the auditory brainstem. We used Ca
v
1.3-deficient (Ca
v
1.3
−/−
) mice because these mice lack cochlea-driven activity that deprives the auditory centers from peripheral input. We found a drastically reduced volume in all auditory brainstem centers (range 25–59%, total 35%), which was manifest before hearing onset. A reduction was not obvious outside the auditory system. The lateral superior olive (LSO) was strikingly malformed in Ca
v
1.3
−/−
mice and had fewer neurons (1/3 less). The remaining LSO neurons displayed normal dendritic trees and received functional glutamatergic input, yet they fired action potentials predominantly with a multiple pattern upon depolarization, in contrast to the single firing pattern prevalent in controls. The latter finding appears to be due to a reduction of dendrototoxin-sensitive potassium conductances, presumably mediated through the K
v
1.2 subtype. Fura2 imaging provided evidence for functional Ca
v
1.3 channels in the LSO of wild-type mice. Our results imply that Ca
v
1.3 channels are indispensable for the development of the central auditory system. We propose that the unique LSO phenotype in Ca
v
1.3
−/−
mice, which hitherto was not described in other hereditary deafness models, is caused by the synergistic contribution of two factors: on-site loss of Ca
v
1.3 channels in the neurons plus lack of peripheral input.
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