Beyond faces: the contribution of the amygdala to visual processing in the macaque brain.

The amygdala is present in a diverse range of vertebrate species, such as lizards, rodents, and primates; however, its structure and connectivity differs across species. The increased connections to visual sensory areas in primate species suggests that understanding the visual selectivity of the amygdala in detail is critical to revealing the principles underlying its function in primate cognition. Therefore, we designed a high-resolution, contrast-agent enhanced, event-related fMRI experiment, and scanned 3 adult rhesus macaques, while they viewed 96 naturalistic stimuli. Half of these stimuli were social (defined by the presence of a conspecific), the other half were nonsocial. We also nested manipulations of emotional valence (positive, neutral, and negative) and visual category (faces, nonfaces, animate, and inanimate) within the stimulus set. The results reveal widespread effects of emotional valence, with the amygdala responding more on average to inanimate objects and animals than faces, bodies, or social agents in this experimental context. These findings suggest that the amygdala makes a contribution to primate vision that goes beyond an auxiliary role in face or social perception. Furthermore, the results highlight the importance of stimulus selection and experimental design when probing the function of the amygdala and other visually responsive brain regions.

The left prefrontal cortex determines relevance at encoding and governs episodic memory formation.

The role hemispheric lateralization in the prefrontal cortex plays for episodic memory formation in general, and for emotionally valenced information in particular, is debated. In a randomized, double-blind, and sham-controlled design, healthy young participants (n = 254) performed 2 runs of encoding to categorize the perceptual, semantic, or emotionally valenced (positive or negative) features of words followed by a free recall and a recognition task. To resolve competing hypotheses about the contribution of each hemisphere, we modulated left or right dorsolateral prefrontal cortex (DLPFC) activity using transcranial direct current stimulation during encoding (1 mA, 20 min). With stimulation of the left DLPFC, but not the right DLPFC, encoding and free recall performance improved particularly for words that were processed semantically. In addition, enhancing left DLPFC activity increased memory formation for positive content while reducing that for negative content. In contrast, promoting right DLPFC activity increased memory formation for negative content. The left DLPFC assesses semantic properties of new memory content at encoding and thus influences how successful new episodic memories are established. Hemispheric laterlization-more active left DLPFC and less active right DLPFC-at the encoding stage shifts the formation of memory traces in favor of positively valenced content.

Further unpacking individual differences in mind wandering: The role of emotional valence and awareness.

Previous work has established a link between executive attention ability and mind wandering propensity, these studies typically collapse thought reports into a single category of task-unrelated thoughts (TUTs). We have shown that these TUTs can be differentiated by the emotional valence of their content. Awareness of TUTs might also be an important to consider, yet little work has been done on this front. The current study conceptually replicated and extended previous work by investigating the relationship between individual differences in executive attention, emotional valence and awareness of TUTs. Latent variable models indicated that Executive Attention was differentially correlated with emotional valence TUTs. However, only Attention Control was related to frequency of mind wandering with awareness. Intra-individual analyses indicated that negatively valenced TUTs and TUTs that occurred without awareness were associated with worse performance. Considering different dimensions of TUTs can provide a more complete picture of individual differences in mind wandering.

Early childhood memories of individuals convicted of sexual offences.

This study used innovative transdisciplinary methods to describe the nature and extent of early childhood memories recalled by 84 adults convicted of sexual offences. The timing of the memories, level of detail recalled and way memories were recollected were largely consistent with extant memory research. One important finding, however, was that more than 30% of our participants recalled particularly traumatic and distressing childhood experiences - a much higher proportion than previously observed in nonoffending samples. The extent to which these memories laid the foundation for subsequent emotional content and feature in the evolution of cognitive schemata is not yet well understood. With that in mind, we consider the implications of our findings for the event centrality in self-narratives. We recommend the inclusion of treatment modalities that maximise as yet unrecognised and undervalued narrative inclinations and story-telling abilities of a complicated population of individuals with rich lived experience that stands to benefit greatly from such approaches.

Sensitivity of late ERP old/new effects in source memory to self-referential encoding focus and stimulus emotionality.

In episodic memory, the old/new effect, the contrast of the waveforms elicited by the correctly recognized studied items and the correctly rejected novel items, has been broadly concerned. However, the contribution of self-referential encoding to the old/new effect in source memory (i.e., source-SRE), is far from clarification; further, it remains unclear whether the contribution is susceptible to the factor of stimulus emotionality. To address these issues, adopting the event-related potential (ERP) technique, this study applied words of three types of emotional valences (positive, neutral, vs. negative) in the self-focus vs. external-focus encoding tasks. In the course of the test, four ERP old/new effects were identified: (a) the familiarity- and recollection-reflected mid-frontal effect (FN400) and late positive component (LPC) were both independent of source-SRE and stimulus emotionality; (b) the reconstruction-driven late posterior negativity (LPN) exhibited an adverse pattern of source-SRE and was susceptible to the emotional valence by encoding focus; and (c) the right frontal old/new effect (RFE), reflecting post-retrieval process, exhibited a source-SRE in emotional words. These effects provide compelling evidence for the influences of both stimulus valence and encoding focus on SRE in source memory, especially during the late processes. Further directions considering more perspectives are put forward.

What lies ahead of us? Collective future thinking in Turkish, Chinese, and American adults.

Collective future thinking, namely the anticipation of events for a group, is a relatively new research area in memory studies. Research to date with predominantly Western populations suggests that people tend to expect negative events for their country's future. In two studies, we investigated the emotional valence and perceived control of anticipated future events of one's country and examined the roles of country identification and national well-being in collective future thinking. US and Chinese college students (Study 1) and US, Chinese, and Turkish adults of a community sample (Study 2) imagined events that could happen to their respective countries in 1 week, 1 year, and 10-15 years. Participants rated each event on emotional valence and perceived control. They also completed measures for their country identification and perceived national well-being. Chinese participants imagined future events for their country to be more positive than did the US and Turkish participants, whereas US participants reported higher perceived control by their country for the future events than did Chinese and Turks. Country identification and national well-being predicted more positive future thinking and also mediated cultural differences in future-event valence and perceived country control. These original findings shed critical light on the characteristics of collective future thinking that are shaped by societal-cultural factors.

Output order effects in autobiographical memory in old age: further evidence for an emotional organisation.

It is generally accepted that autobiographical memories (AMs) are organised in associative networks. While both thematic and temporal similarity have been examined as connections among AMs, in the present study we focused on both the positive and negative emotional intensity of events as a possible link among AMs. To do so, we investigated whether the output order with which AMs elicited by cue words were reported can be accounted for emotional intensity of adjacent AMs. Data come from 94 older adults (M [Formula: see text] 67.14; SD [Formula: see text] 6.17) who reported 30 AMs in response to neutral cue words. Positive and negative emotional intensity of AMs were assessed on two separate scales (happiness and sadness). The output order was modeled based on a dual mixed-effects autoregressive model, where the strength of the autoregressive effect indicates how much the emotional intensity of an AM can be predicted by the emotional intensity of the previously reported AM. Results show that there were significant autoregressive effects for both the happiness and sadness ratings (accounting for 4% of variance). We also observed cross-over effects, such that the happiness rating of an AM was predicted by the sadness rating of the previously reported AM (and vice versa). Moreover, we found individual differences in the strength of the autoregressive effects. For the sadness ratings, these individual differences tended to be related to the participant's mood state, particularly so during the first output positions. Together, these findings demonstrate that there is a substantive effect of emotional intensity on the output order with which AMs are reported-even when elicited by cue words. Based on the premise that the output order of AMs informs about the organisation of autobiographical memory, our results highlight the role of emotional associations among AMs in old age.

Themes of trust, identity, intimacy, and generativity in important autobiographical memories: Associations with life periods and life satisfaction.

INTRODUCTION: Guided by Erikson's theory of psychosocial development, the present study investigated whether themes of trust, identity, intimacy, and generativity are represented in older adults' most important autobiographical memories. Furthermore, we tested whether these themes are associated with certain life periods and whether having important memories (i.e., life story) that reflect developmental themes and are evaluated as positive is associated with life satisfaction. METHODS: One hundred and twelve (59.8% female) older adults (61-92 years, M = 70.96, SD = 6.81) reported up to 15 important autobiographical memories. Participants rated each memory according to the themes of trust/mistrust, identity/confusion, intimacy/isolation, and generativity/stagnation. RESULTS: Using multilevel multinomial logistic regression, we found childhood memories to be associated with trust, memories from participants' youth with identity and intimacy, and adulthood memories with intimacy and generativity. Moreover, participants who rated their autobiographical memories (i.e., life story) as high in reflecting themes and, at the same time, perceived their memories as more positive showed higher levels of life satisfaction. CONCLUSION: Important autobiographical memories reflect how an individual became the person of today. They refer to age-related themes of psychosocial development and are associated with a person's life satisfaction if they are also considered as emotionally more positive.

Are valence and arousal related to the development of amodal representations of words? A computational study.

In this study, we analyzed the relationship between the amodal (semantic) development of words and two popular emotional norms (emotional valence and arousal) in English and Spanish languages. To do so, we combined the strengths of semantics from vector space models (vector length, semantic diversity, and word maturity measures), and feature-based models of emotions. First, we generated a common vector space representing the meaning of words at different developmental stages (five and four developmental stages for English and Spanish, respectively) using the Word Maturity methodology to align different vector spaces. Second, we analyzed the amodal development of words through mixed-effects models with crossed random effects for words and variables using a continuous time metric. Third, the emotional norms were included as covariates in the statistical models. We evaluated more than 23,000 words, whose emotional norms were available for more than 10,000 words, in each language separately. Results showed a curve of amodal development with an increasing linear effect and a small quadratic deceleration. A relevant influence on the amodal development of words was found only for emotional valence (not for arousal), suggesting that positive words have an earlier amodal development and a less pronounced semantic change across early lifespan.

Higher judgements of learning for emotional words: processing fluency or memory beliefs?

Previous research has shown that emotionally-valenced words are given higher judgements of learning (JOLs) than are neutral words. The current study examined potential explanations for this emotional salience effect on JOLs. Experiment 1 replicated the basic emotionality/JOL effect. In Experiments 2A and 2B, we used pre-study JOLs and assessed memory beliefs qualitatively, finding that, on average, participants believed that positive and negative words were more memorable than neutral words. Experiment 3 utilised a lexical decision task, resulting in lower reaction times (RTs) for positive words than for neutral words, but equivalent RTs for negative and neutral words, suggesting that processing fluency may partially account for higher JOLs for positive words, but not for negative words. Finally, we conducted a series of moderation analyses in Experiment 4 which assessed the relative contributions of fluency and beliefs to JOLs by measuring both factors in the same participants, showing that RTs made no significant contribution to JOLs for either positive or negative words. Our findings suggest that although positive words may be more fluently processed than neutral words, memory beliefs are the primary factor underlying higher JOLs for both positive and negative words.

Facial thermal and blood perfusion patterns of human emotions: Proof-of-Concept.

In this work, a preliminary study of proof-of-concept was conducted to evaluate the performance of the thermographic and blood perfusion data when emotions of positive and negative valence are applied, where the blood perfusion data are obtained from the thermographic data. The images were obtained for baseline, positive, and negative valence according to the protocol of the Geneva Affective Picture Database. Absolute and percentage differences of average values of the data between the valences and the baseline were calculated for different regions of interest (forehead, periorbital eyes, cheeks, nose and upper lips). For negative valence, a decrease in temperature and blood perfusion was observed in the regions of interest, and the effect was greater on the left side than on the right side. In positive valence, the temperature and blood perfusion increased in some cases, showing a complex pattern. The temperature and perfusion of the nose was reduced for both valences, which is indicative of the arousal dimension. The blood perfusion images were found to be greater contrast; the percentage differences in the blood perfusion images are greater than those obtained in thermographic images. Moreover, the blood perfusion images, and vasomotor answer are consistent, therefore, they can be a better biomarker than thermographic analysis in identifying emotions.

Personal Narratives of School-Age Children: A Cross-Sectional Developmental Study.

INTRODUCTION: Personal narratives are monological stories based on a personal experience that help children explain and understand their emotional states, as well as process positive and negative experiences. The aim of this study was to identify age- and emotion-related traits of lexical and grammatical abilities and coherence of personal stories produced by school-aged children between 7 and 13 years. METHODS: A total of 60 typically developing children, speakers of Croatian, were stratified into three groups according to age. Using the Global TALES protocol, each child was asked to produce six personal stories prompted by different emotional states. The personal narratives were analysed using measures of lexical diversity (lemma-token ratio and number of different words), productivity (total number of words), and syntactic complexity (mean length of utterances and clausal density). Based on the Narrative Coherence Coding Scheme, three coherence dimensions (context, chronology, and theme) were rated. RESULTS: Age group was shown to explain 18% of the variance in the ability to produce personal narratives. Personal narratives elicited through positive prompts were overall more lexically diverse but were significantly less elaborated chronologically and thematically than negative and neutral narratives. CONCLUSION: This study showed that coherence of the produced stories was connected with the child's lexicon and that both variables - lexicon and coherence - were influenced by emotional valence of the story. In contrast, grammatical aspects of the narrative were influenced only by age. Finally, it is possible to state that the Global TALES protocol is sensitive enough to capture specificities of creating personal stories, both developmental ones and those created under the influence of the emotional valence of the prompts.

Emoji-SP, the Spanish emoji database: Visual complexity, familiarity, frequency of use, clarity, and emotional valence and arousal norms for 1031 emojis.

This article presents subjective norms for 1031 emojis in six dimensions: visual complexity, familiarity, frequency of use, clarity, emotional valence, and emotional arousal. This is the largest normative study conducted so far that relies on subjective ratings. Unlike the few existing normative studies, which mainly comprise face emojis, here we present a wide range of emoji categories. We also examine the correlations between the dimensions assessed. Our results show that, in terms of their affective properties, emojis are analogous to other stimuli, such as words, showing the expected U-shaped relationship between valence and arousal. The relationship between affective properties and other dimensions (e.g., between valence and familiarity) is also similar to the relationship observed in words, in the sense that positively valenced emojis are more familiar than negative ones. These findings suggest that emojis are suitable stimuli for studying affective processing. Emoji-SP will be highly valuable for researchers of various fields interested in emojis, including computer science, communication, linguistics, and psychology. The full set of norms is available at: https://osf.io/dtfjv/ .

Self-defining memories among persons with mental health, substance use, cognitive, and physical health conditions: a systematic review.

BACKGROUND: Self-defining memories (SDMs) are important for identifying one's purpose in life, achieving goals, and overcoming challenging situations. Individual studies have demonstrated differences in the characteristics of SDMs between clinical and non-clinical populations. This systematic literature review aimed to summarise and compare SDM characteristics among those with mental, substance use, cognitive, neurodevelopmental, and physical health challenges. METHODS: Peer-reviewed English-language studies were included if they evaluated SDMs in these groups. RESULTS: Thirty-five studies (N = 3123) were included. SDM content across all clinical populations tended to focus on illness themes. SDMs were generally less specific and integrated in those with mental health or substance use disorders as compared to non-clinical populations. SDM specificity and integration findings were more mixed in those with cognitive, neurodevelopmental, and physical health challenges. CONCLUSIONS: Specific differences emerged between groups of individuals which may be related to illness characteristics, recovery trajectory, and individual differences in the ability to understand and process difficult life events.

How suspense and surprise enhance subsequent memory: the case of the 2016 United States Presidential Election.

We examined whether the retroactive enhancement effect - i.e., improved memory accuracy for event details occurring before a surprising moment - would be present in participants' memory for details in their private lives following a surprising and suspenseful public event. To equate event type across participants, we selected when they first learned the outcome of the 2016 US Presidential Election. Participants self-divided into those who viewed the outcome as positive, negative, or neutral, while we experimentally divided them into those whose memory was assessed 6 or 12 months post-election. We assessed their accuracy for details surrounding the election and their phenomenological experience of learning the outcome, including emotional tension, our operationalisation of suspense. We found participants' memory characteristics were strongly related to their level of tension and shock, irrespective of valence. We also observed uniformly high accuracy regarding details about the weather participants experienced in their ZIP codes on election day. While these results intimated about the presence of retroactive enhancement, Experiment 2 examined the effect more directly by comparing participants' memory for the 2016 Election with two other politically-relevant events that provoked less tense reactions. The results revealed retroactive enhancement is dependent upon experiencing a surprising moment amidst a suspenseful event.

Older adults get masked emotion priming for happy but not angry faces: evidence for a positivity effect in early perceptual processing of emotional signals.

In higher-level cognitive tasks, older compared to younger adults show a bias towards positive emotion information and away from negative information (a positivity effect). It is unclear whether this effect occurs in early perceptual processing. This issue is important for determining if the positivity effect is due to automatic rather than controlled processing. We tested this with older and younger adults on a positive/negative face emotion valence classification task using masked priming. Positive (happy) and negative (angry) face targets were preceded by masked repetition or valence primes with neutral face baselines. In Experiment 1, 30 younger and 30 older adults were tested with 50 ms primes. Younger adults showed repetition priming for both positive and negative targets. Older adults showed repetition priming for positive but not negative targets. Neither group showed valence priming. In Experiment 2, 30 older and 29 younger adults were tested with longer duration primes. Younger adults showed repetition priming for both positive and negative emotions, and no valence priming. Older adults only showed repetition and valence priming for positive targets. We proposed older adults' lack of angry face priming was due to an early attention orienting strategy favouring happy expressions at the expense of angry ones.

Spatial artistic displays of emotional valence.

Background: While right-left hemispheric valence dichotomies have been demosntrated in various lesion stidues, it not entirely known if these dichotomies are portrayed in art. Methods: We examined 192 paintings to learn if there is an association between paintings that portray happy-positive or sad-negative scenes and the agent looking to the right or left side relative to their head's midsagittal plane. Results: There were 38 paintings with a positive valence and 32 with a negative valence in which the eyes were turned rightward or leftward. Of 38 positive valence paintings, 28 had the agent looking rightward, and 10 looking leftward. Of 32 negative valence paintings, 15 had the agent looking rightward and 17 leftward. Discussion: Hemisphere activation is associated with contralateral deviation of the eyes. Whereas the right hemisphere mediates negative emotions allocates spatial attention to both left and right hemispace, the left hemisphere primarily allocates attention to the right. Since the left hemisphere appears to mediate positive emotions and the right hemisphere negative emotions, results from this study are consistent with hemispheric emotional valence attentional hypotheses. However, the relationship between artist knowledge about gaze and the utilization of gaze direction to portray emotional experiences is not known.

Promoting public engagement with household waste separation through government social media: A case study of Shanghai.

Government agencies around the world are increasingly using social media to promote public engagement with government-initiated activities, such as Household Waste Separation (HWS). However, existing studies fail to examine how governments can use their official social media accounts to promote public engagement with HWS. This pioneering study investigates the effects of dialogic loop, media richness, content theme, and emotional valence on public engagement with HWS through Government Social Media (GSM). Moreover, the influencing mechanisms are explored by examining the moderating role of social media capital. In total, 1795 posts were scraped from the official Sina Weibo accounts of seventeen Shanghai governments and later analyzed. Results reveal that dialogic loop positively predicts public engagement with HWS through GSM, but media richness negatively affects public engagement. Content themes have significantly different impacts on the level of public engagement with HWS through GSM. Unexpectedly, the effect of emotional valence is not significant. This study is the first of its kind to demonstrate the moderating role of social media capital which is seen to weaken the positive effect of dialogic loop on public engagement with HWS through GSM and mitigate the negative effect of media richness.

Age-related evaluations of imageability and subjective frequency for 1286 neutral and emotional French words: ratings by young, middle-aged, and older adults.

This study aimed at providing imageability and subjective frequency ratings collected from four adult age groups ranging from 18 to 85 years old (18-25; 26-39; 40-59; and 60 and over) for 1286 neutral and emotional French words available in the EMA database (Gobin et al., 2017). Overall, the older adults rated words as more (subjectively) frequent and more imageable than the younger adults. Furthermore, we examined the relationships between subjective frequency and imageability, as well as those with emotional variables (i.e., valence, arousal) already available for these words, for each age group. For all age groups, more subjective frequent words were more imageable. Emotional words were more imageable and more frequent. Arousal scores were lower for low- and high-imageability words, and higher for more subjective frequent words. The strength of these links between subjective frequency, imageability, and emotional ratings was found to decrease as a function of age. Finally, by using the lexical decision reaction times and accuracy rates of young adults from Megalex (Ferrand et al., 2018), imageability and subjective frequency across age were found to provide an additional contribution to visual word recognition performance as compared to objective lexical variables (i.e., number of letters, syllables, objective frequency, orthographic neighborhood). More importantly, subjective frequency and imageability ratings from the youngest group predicted reaction times and accuracy better than ratings from the oldest group. By providing new age-adapted word characteristics, this norm should be of great use to researchers in the field of cognitive aging who use word materials.

The Effect of Emotional Valence on Auditory Word Recognition Memory in English as a Foreign Language.

The present study investigated the effect of emotional valence on auditory word recognition memory in English as a foreign language. Participants included 48 native Spanish speakers whose foreign language was English. They viewed four emotionally negative, four positive, and four neutral videos that, in total, contained 48 emotionally valenced target words. After watching the videos, participants completed an auditory word recognition memory task where target words, and the same number of fillers, were presented. The results showed a statistically significant main effect of valence on both reaction times and accuracy. Positive words were recognised more accurately and faster than neutral and negative words, but no difference between neutral and negative stimuli was found. These findings fit in well within the gradient model of automatic vigilance, which implies that emotional valence has a monotonic effect on processing latencies during auditory recognition memory in a foreign language.