Global Contextual Dependency Network for Object Detection

Current two-stage object detectors extract the local visual features of Regions of Interest (RoIs) for object recognition and bounding-box regression. However, only using local visual features will lose global contextual dependencies, which are helpful to recognize objects with featureless appearances and restrain false detections. To tackle the problem, a simple framework, named Global Contextual Dependency Network (GCDN), is presented to enhance the classification ability of two-stage detectors. Our GCDN mainly consists of two components, Context Representation Module (CRM) and Context Dependency Module (CDM). Specifically, a CRM is proposed to construct multi-scale context representations. With CRM, contextual information can be fully explored at different scales. Moreover, the CDM is designed to capture global contextual dependencies. Our GCDN includes multiple CDMs. Each CDM utilizes local Region of Interest (RoI) features and single-scale context representation to generate single-scale contextual RoI features via the attention mechanism. Finally, the contextual RoI features generated by parallel CDMs independently are combined with the original RoI features to help classification. Experiments on MS-COCO 2017 benchmark dataset show that our approach brings continuous improvements for two-stage detectors.

Time-dependent emotional memory transformation: divergent pathways of item memory and contextual dependency

Emotional memory can persist strikingly long, but it is believed that not all its elements are protected against the fading effects of time. So far, studies of emotional episodic memory have mostly investigated retention up to 24h post-encoding, and revealed that central emotional features (items) are usually strengthened, while contextual binding of the event is reduced. However, even though it is known for neutral memories that central versus contextual elements evolve differently with longer passage of time, the time-dependent evolution of emotional memories remains unclear. Hypothetically, compared to neutral memories, emotional item memory becomes increasingly stronger, accompanied by accelerated decay of – already fragile – links with their original encoding contexts, resulting in progressive reductions in contextual dependency. Here, we tested these predictions in a large-scale study. Participants encoded emotional and neutral episodes, and were assessed 30 minutes (N = 40), one day (N = 40), one week (N = 39), or two weeks (N = 39) later on item memory, contextual dependency, and subjective quality of memory. The results show that, with the passage of time, emotional memories were indeed characterized by increasingly stronger item memory and weaker contextual dependency. Interestingly, analyses of the subjective quality of memories revealed that stronger memory for emotional items with time was expressed in familiarity, whereas increasingly smaller contextual dependency for emotional episodes was reflected in recollection. Together, these findings uncover the time-dependent transformation of emotional episodic memories, thereby shedding light on the ways healthy and maladaptive human memories may develop.

The effect of givenness and referring expression on dative alternation in Norwegian: A reaction time study

This study investigates how givenness and pronominality affect the dative alternation in Norwegian. Previous studies have found givenness to influence the Double Object Dative (DOD) but not the Prepositional Dative (PD). Thirty-one Norwegian native speakers completed a speeded acceptability judgment task, in which given objects were expressed by definite DPs or pronouns, and either preceded or followed the new referent. DODs were found to be highly sensitive to givenness. Surprisingly, PDs also showed contextual dependency. Referring expressions affected the two structures differently: reaction times were faster with pronouns in DODs and slower in PDs. This suggests that the alternates have different processing biases, with the former preferring pronouns and the latter DPs. The results are further considered in relation to the notion of harmonic alignment, as PDs, in which the typically animate recipient is always the second object, and will thus consistently represent a suboptimal and non-harmonious order when givenness is adhered to.

Prosody and Spoken-Word Recognition

This chapter outlines a Bayesian model of spoken-word recognition and reviews how prosody is part of that model. The review focuses on the information that assists the listener in recognizing the prosodic structure of an utterance and on how spoken-word recognition is also constrained by prior knowledge about prosodic structure. Recognition is argued to be a process of perceptual inference that ensures that listening is robust to variability in the speech signal. In essence, the listener makes inferences about the segmental content of each utterance, about its prosodic structure (simultaneously at different levels in the prosodic hierarchy), and about the words it contains, and uses these inferences to form an utterance interpretation. Four characteristics of the proposed prosody-enriched recognition model are discussed: parallel uptake of different information types, high contextual dependency, adaptive processing, and phonological abstraction. The next steps that should be taken to develop the model are also discussed.

Stress modulation of fear and extinction in psychopathology and treatment

The glucocorticoid cortisol, a major player in the development of stress-related psychopathology, can also be used for the augmentation of extinction-based psychotherapies (e.g., exposure therapy). Substantial evidence supports its beneficial effects in the treatment of post-traumatic stress disorder and specific phobias. In this review, we first present the role of stress and cortisol in the development of maladaptive emotional memories. Then, we describe the mechanisms that may account for the cortisol-induced augmentation of exposure, namely, the enhancement of extinction memory consolidation and the reduction of the contextual dependency of the extinction memory. Finally, we discuss several considerations and limitations for the use of cortisol in psychotherapy, focusing on the possible adverse effects of cortisol in a reconsolidation-based (as opposed to extinction-based) intervention.

Describing Life: Towards the Conception of Howard Pattee

A description of living systems is still a topic of discussion among a number of disciplines. By an evaluation of the approaches, we get to an axis differentiating those that are indisputable in sense of dealing with verifiable and measurable phenomena. We thus also get to approaches that integrate particular extensions when dealing with the possibilities to describe living systems and processes. It is a task for biosemiotics to find connections of these approaches and thus ways to enrich each other or simply describe phenomena to the widest extent possible. One of the authors whose work is permeated by this idea is Howard Pattee. Inspired by his work, we discuss the options of description when talking about living systems and semiotic apparatuses. We do so by a formulation of two viewpoints that differ in questions of contextual dependency, interpretation and necessity of the existence of an autonomous agent as indispensable elements for the description of life phenomena.