The influence of temporal association on the representation and recognition objects was investigated. Observers were shown sequences novel faces in which identity face changed as head rotated. As a result, observers showed tendency to treat views if they same person. Additional experiments revealed that this only true training depicted rotations rather than jumbled views; other words, sequence had be spatially well temporally smooth. Results suggest we are continuously associating support...

Abstract Increasing evidence suggests a link between attention, working memory, serotonin (5-HT), and prefrontal cortex activity. In an attempt to tease out the relationship these elements, this study tested effects of hallucinogenic mixed 5-HT1A/2A receptor agonist psilocybin alone after pretreatment with 5-HT2A antagonist ketanserin. Eight healthy human volunteers were on multiple-object tracking task spatial memory under four conditions: placebo, (215 Ag/kg), ketanserin (50 mg),...

A common theme running through much of the visual recognition literature is that faces are special. Many studies now describe evidence for idea processed in a dedicated center cortex. Studies have also argued presence evolutionarily expedient pathways to processing certain facial expressions. Evidence this proposal comes largely from search tasks which established threatening expressions more rapidly detected than other expressions: 'face-in-the-crowd effect'. One open criticism effect it...

Luminance vision has high spatial resolution and is used for form texture discrimination. In humans, birds bees luminance channel spectrally selective – it depends on the signals of long-wavelength sensitive photoreceptors (bees) or sum long- middle- wavelength cones (humans), but not signal short-wavelength (blue) photoreceptors. The reasons such selectivity are fully understood. aim this study to reveal inputs cone in reef fish. 16 freshly caught damselfish, Pomacentrus amboinensis, were...

Abstract Two rival theories of how humans recognize faces exist: (i) recognition is innate, relying on specialized neocortical circuitry and (ii) a learned expertise, general object pathways. Here, we explore whether animals without neocortex, can learn to human faces. Human facial has previously been demonstrated for birds, however they are now known possess neocortex-like structures. Also, with much the work done in domesticated pigeons, one cannot rule out possibility that have developed...

Coral reef fish live in a complex world of colour and patterns. If they are to survive need be able correctly identify the things see (e.g. predators, prey) act accordingly flee, feed). This paper investigates whether discrimination is limited ecologically relevant stimuli or fact more adaptable. Our work focuses on damselfish Pomacentrus amboinensis. Within day two capture demonstrated an ability associate arbitrary stimulus with food reward discriminate from distractor matched along...

Over many millions of years, sea creatures have developed a range light reflectance properties. One example is the large variation in patterns and colours fish inhabiting world's coral reefs. Attempts to understand significance colouration been made, but all too often from perspective human observer. A more ecological approach requires us consider visual system those for whom were intended, namely other life. first step sensitivity reef themselves colour. Physiological data has revealed...

Coral reef fish present the human observer with an array of bold and contrasting patterns; however, ability such to perceive these patterns is largely unexamined. To understand this, visual acuity animals - degree which they can resolve fine detail must be ascertained. Behavioural studies are few in number anatomical analysis has focused on estimates ganglion cell density predict coral fish. Here, we report measures for triggerfish Rhinecanthus aculeatus. Acuity was first assessed using a...

When humans reach to visual targets, extremely rapid (∼90 ms) target-directed responses can be observed in task-relevant proximal muscles. Such express visuomotor are inflexibly locked time and space the target have been proposed reflect transformations conveyed subcortically via tecto-reticulo-spinal pathway. Previously, we showed that sensitive explicit cue-driven information about target, suggesting pathway modulated by cortical signals affording contextual prestimulus expectations. Here,...

Abstract Studies concerning the processing of natural scenes using eye movement equipment have revealed that observers retain surprisingly little information from one fixation to next. Other studies, in which remained constant while elements within scene were changed, shown that, even without refixation, objects a are poorly represented. Although this effect has been studied some detail static scenes, there relatively work on as we would normally experience them, namely dynamic and ever...

Humans typically have a remarkable memory for faces. Nonetheless, in some cases they can be fooled. Experiments described this paper provide new evidence an effect which observers falsely "recognize" face that never seen before. The is chimera (prototype) built from parts extracted previously viewed It known faces of kind confused with truly familiar faces, result referred to as the prototype effect. However, recent studies failed find full effect, one regarded not only familiar, but more...

This article investigates vehicle steering control, focusing on the task of lane changing and role different sources sensory feedback. Participants carried out 2 experiments in a fully instrumented, motion-based simulator. Despite high level realism afforded by simulator, participants were unable to complete change absence visual When asked produce movements required lanes turn corner, produced remarkably similar behavior each case, revealing misconception how lane-change maneuver is...

Acrophobia is one of the most prevalent phobias, affecting as many 1 in 20 individuals. Of course, heights often evoke fear general population too, and this suggests that acrophobia might actually represent hypersensitive manifestation an everyday, rational fear. In study, we assessed role sensory cognitive variables acrophobia.Forty-five participants (Mean age 25.07 years, 71% female) were using a booklet with self-reports well several behavioral measures. The data analysis consisted...

As the orientation or illumination of an object changes so does its appearance. This paper considers how observers are nonetheless able to recognize objects that have undergone such changes. In particular tests hypothesis rely on temporal correlations between different views decide whether they same not. a series experiments subjects were shown sequence representing slowly transforming object. Testing revealed had formed representations which directly influenced by characteristics training...