Manipulation Of Imagery Research Articles

Network structure and dynamics of the mental workspace

The conscious manipulation of mental representations is central to many creative and uniquely human abilities. How does the human brain mediate such flexible mental operations? Here, multivariate pattern analysis of functional MRI data reveals a widespread neural network that performs specific mental manipulations on the contents of visual imagery. Evolving patterns of neural activity within this mental workspace track the sequence of informational transformations carried out by these manipulations. The network switches between distinct connectivity profiles as representations are maintained or manipulated.

Visuospatial imagery and working memory in schizophrenia

IntroductionThe ability to form mental images that reconstruct former perceptual experiences is closely related to working memory (WM) ability. However, whereas WM deficits are established as a core feature of schizophrenia, an independent body of work suggests that mental imagery ability is enhanced in the disorder. Across two experiments we investigated mental imagery in schizophrenia and its relationship with WM.MethodsIn Experiment 1, individuals with schizophrenia (SZ: n=15) and matched controls (CO: n=14) completed a mental imagery generation and inspection task and a spatial delayed-response WM task. In Experiment 2, SZ (n=16) and CO (n=16) completed a novel version of the mental imagery task modified to increase WM maintenance demand.ResultsIn Experiment 1, SZ demonstrated enhanced mental imagery performance, as evidenced by faster response times relative to CO, with preserved accuracy. However, enhanced mental imagery in SZ was accompanied by impaired WM as assessed by the delayed-response task. In Experiment 2, when WM maintenance load was increased, SZ no longer showed superior imagery performance.ConclusionsWe found evidence for enhanced imagery manipulation in SZ despite their WM maintenance deficit. However, this imagery enhancement was abolished when WM maintenance demands were increased. This profile of enhanced imagery manipulation but impaired maintenance could be used to implement novel remediation strategies in the disorder.

The violent image: insurgent propaganda and the new revolutionaries

Fast-moving, self-perpetuating images of violence have radically changed the nature of insurgency in modern times, and the global media trafficking in these images have fundamentally transformed the act and speed of the exchange among populations. First satellite TV, then laptops and the Internet, and now cellphones and social media, new technologies have revolutionized the act of communication and have collapsed the impediments of time and distance. Rebels who hope to overthrow states and revolutionaries who aim to establish transnational, ideological communities have only to utilize these dynamic technologies to advance their goals. Yet trial and error has also taught a key lesson: in a visual world, the pull of the violent image is more powerful and resonant than the draw of the carefully-crafted word. Neville Bolt dives headfirst into the innovative strategies of today's revolutionaries and their fascinating appropriation of the nineteenth-century practice of propaganda of the deed, or the political act of violence. No longer is the terrorist act simply a means to push governments to overreact, therefore shredding their legitimacy and credibility. The deed has instead become an efficient tool to initiate a campaign of shock and awe, exposing and exploiting the grievances that underlie communities' fragile ties. Images of 9/11, 7/7, Abu Ghraib, and collateral damage are the contemporary weapons of choice. The Violent Image explores the emotional and psychological components of this visual moment of shock, or the binding of emotive pictures to messages causing popular uprisings. From terrorist groups such as the Fenians and the Taliban to the architects of the ongoing Arab Spring, this study follows insurgents and their manipulation of violent imagery to build narratives and bring social change. Taking advantage of the war of ideas, new revolutionaries generate surges of support that spread virally through global networks, often so quickly that states are unable to respond in time and kind. This book ultimately asks whether the world has reached a point in which insurgents and populations are driving images and ideas so rapidly that we are already in the grip of a new era of revolutionary politics.

Exceptional visuospatial imagery in schizophrenia; implications for madness and creativity.

Biographical and historical accounts suggest a link between scientific creativity and schizophrenia. Longitudinal studies of gifted children indicate that visuospatial imagery plays a pivotal role in exceptional achievements in science and mathematics. We asked whether visuospatial imagery is enhanced in individuals with schizophrenia (SZ). We compared SZ and matched healthy controls (HC) on five visuospatial tasks tapping parietal and frontoparietal functions. Two aspects of visuospatial transformation, spatial location and mental imagery manipulation were examined with Paper Folding Test (PFT) and jigsaw puzzle task (JPT), respectively. Visuospatial intelligence was assessed with Ravens Progressive Matrices, which is associated with frontoparietal network activity. Hemispatial inattention implicating parietal function was assessed with line bisection (LB) task. Mediated by prefrontal cortex, spatial delayed response task (DRT) was used to index working memory maintenance, which was impaired in SZ compared to HC. In contrast, SZ showed intact visuospatial intelligence and transformation of location. Further, SZ performed significantly better than HC on JPT indicating enhanced mental imagery manipulation. Spatial working memory (SWM) maintenance and mental imagery manipulation were strongly associated in HC but dissociated in SZ. Thus, we observed enhanced mental imagery manipulation in SZ but the dissociation of mental imagery from working memory suggests a disrupted frontoparietal network. Finally, while HC showed the expected leftward pseudoneglect, SZ showed increased rightward LB bias implicating left hemispatial inattention and impaired right parietal control of spatial attention. The current results chart a unique profile of impaired, spared and enhanced parietal-mediated visuospatial functions implicating parietal abnormalities as a biobehavioral marker for SZ. We discuss these results in relation to creative cognition.

An experimental study on transfer of imagery manipulation ability

An experimental study on transfer of imagery manipulation ability

Equivocators or zealots? Post-revolutionary re-imaging colonial languages, names and name change in Ireland and South Africa

Successful revolutionaries often find themselves in a distinctly uneasy position vis-à-vis the cultural burden of the pre-revolution which they inherit. Establishing a stable and effective government often means alienating their own ‘wild men screaming through the key hole’. Yet, they also need to stamp their revolutionary credentials both on the new society they wish to construct and as a territorialising edict to the defeated. This also serves as an implicit edict to the defeated that their day has passed. To achieve this, manipulation of imagery is fundamental in the successful revolutionary’s arsenal. This article documents the reaction of two very different counties, Ireland and South Africa, in their post-revolutionary eras. It notes their differing, and at times bizarre, attempts at re-branding nationhood in the image of the successful revolution. Ireland after 1922 was on the whole more restrained in its image-making than was South Africa after 1994, yet both, for reasons of revolutionary fervour, revenge or strategy, showed the old order that change was non-negotiable, be it in language policy, civic honours and titles, emblems and symbols of state, or simply in place and street names. In such instances heritage is frequently the handmaiden of political necessity, often crude but sometimes subtle.

When plausibility manipulations work: An examination of their role in the development of false beliefs and memories

In the current study we examined whether prevalence information and imagery encoding influence participants' general plausibility, personal plausibility, belief, and memory ratings for suggested childhood events. Results showed decreases in general and personal plausibility ratings for low prevalence events when encoding instructions were not elaborate; however, instructions to repeatedly imagine suggested events elicited personal plausibility increases for low-prevalence events, evidence that elaborate imagery negated the effect of our prevalence manipulation. We found no evidence of imagination inflation or false memory construction. We discuss critical differences in researchers' manipulations of plausibility and imagery that may influence results of false memory studies in the literature. In future research investigators should focus on the specific nature of encoding instructions when examining the development of false memories.

Poster #147 PSYCHOMETRIC PROPERTIES OF KOREAN VERSION OF LAUNAY-SLADE HALLUCINATION SCALE-REVISED IN NON-CLINICAL AND CLINICAL POPULATION

Neuroimaging studies have highlighted that intrinsic brain activity is modified to implement task demands. However, the relation between mental rotation and intrinsic brain activity remains unclear. To answer this question, we collected functional MRI (fMRI) data from 30 healthy participants in two mental rotation task periods (1st-task state, 2nd-task state) and two rest periods before (pre-task resting state) and after the task (post-task resting state) respectively. By combining the spatial independent component analysis (ICA) and voxel-wise functional connectivity strength (FCS), we identified FCS maps of 10 brain resting state networks (RSNs) within six different bands (i.e., 0–0.05, 0.05–0.1, 0.1–0.15, 0.15–0.2, 0.2–0.25, and 0.01–0.08 Hz) corresponding to the four states for each subject. The maximum uncertainty linear discriminant analysis (MLDA) method showed that the FCS within the low frequency bandwidth of 0.05–0.1 Hz could effectively classify the mental rotation task state from pre-/post-task resting states but failed to discriminate the pre- and post-task resting states. Discriminative FCSs were observed in the cognitive executive-control network (central executive and attention) and the imagery-based internal mental manipulation network (default mode, primary sensorimotor, and primary visual). Imagery manipulation is a stable mental element of mental rotation, and the involvement of executive control is dependent on the degree of task familiarity. Together, the present study provides evidence that mental rotation task specifically modifies intrinsic brain activity to complement cognitive demands, which provides further insight into the neural basis of mental rotation manipulation.

Source-constrained retrieval influences the encoding of new information

Jacoby, Shimizu, Daniels, and Rhodes (Psychonomic Bulletin & Review, 12, 852-857, 2005) showed that new words presented as foils among a list of old words that had been deeply encoded were themselves subsequently better recognized than new words presented as foils among a list of old words that had been shallowly encoded. In Experiment 1, by substituting a deep-versus-shallow imagery manipulation for the levels-of-processing manipulation, we demonstrated that the effect is robust and that it generalizes, also occurring with a different type of encoding. In Experiment 2, we provided more direct evidence for context-related encoding during tests of deeply encoded words, showing enhanced priming for foils presented among deeply encoded targets when participants made the same deep-encoding judgments on those items as had been made on the targets during study. In Experiment 3, we established that the findings from Experiment 2 are restricted to this specific deep judgment task and are not a general consequence of these foils being associated with deeply encoded items. These findings provide support for the source-constrained retrieval hypothesis of Jacoby, Shimizu, Daniels, and Rhodes: New information can be influenced by how surrounding items are encoded and retrieved, as long as the surrounding items recruit a coherent mode of processing.

Evaluation of the Use of Healing Imagery in Athletic Injury Rehabilitation

Healing imagery can be defined as both visualizing affirmative images of internal physiological healing occurring in an injured area and visualizing oneself as healthy and fully functioning (Driediger, Hall, & Callow, 2006). Healing imagery has been found to effectively reduce the time of recovery from various athletic injuries when used in combination with other mental skills, such as self-talk and relaxation (Ievleva & Orlick, 1991). However, the literature remains void of a study that specifically examines healing imagery and the potential benefits that may accompany the regular application of healing imagery techniques alone. This study examined the effects of an imagery intervention on the recovery of athletes experiencing an athletic injury in comparison to a control group who did not receive the imagery manipulation. The purpose of the present study was to determine the effectiveness of a healing imagery intervention through comparing the two groups on: satisfaction with rehabilitation, self-efficacy to recover, and recovery time. The sample consisted of 13 injured varsity athletes (intervention group, n=6; control group, n=7) utilizing the athletic therapy services at Wilfrid Laurier University. A significant interaction effect was found for satisfaction with rehabilitation, as athletes' in the intervention group increased in satisfaction from week 2 to 3 while the control group decreased in satisfaction during the same time period. The intervention group also used significantly more cognitive imagery than the control group. Both groups were found to be significantly higher in task self-efficacy than coping self-efficacy during injury rehabilitation. A follow-up qualitative analysis of the intervention group revealed that the healing imagery intervention positively affected athletes' in a unique, individualized manner. Results are discussed with respect to a gained understanding of imagery effects, study limitations, and future directions.

Task-based annotation and retrieval for image information management

Continuing advances in digital image capture and storage are resulting in a proliferation of imagery and associated problems of information overload in image domains. In this work we present a framework that supports image management using an interactive approach that captures and reuses task-based contextual information. Our framework models the relationship between images and domain tasks they support by monitoring the interactive manipulation and annotation of task-relevant imagery. During image analysis, interactions are captured and a task context is dynamically constructed so that human expertise, proficiency and knowledge can be leveraged to support other users in carrying out similar domain tasks using case-based reasoning techniques. In this article we present our framework for capturing task context and describe how we have implemented the framework as two image retrieval applications in the geo-spatial and medical domains. We present an evaluation that tests the efficiency of our algorithms for retrieving image context information and the effectiveness of the framework for carrying out goal-directed image tasks.

Interacting in 3D Space: Comparison of a 3D Two-handed Interface to a Keyboard-and-mouse Interface for Medical 3D Image Manipulation

Interacting with computer-generated 3-dimensional (3D) data can pose challenges in the control of 3D objects and navigation in 3D space. The traditional mouse-driven interfaces are limited to controlling two degrees of freedom (DOF) at a time. The current research examines the efficacy of a two-handed interface (THI), “iMedic,” that uses two 6-DOF controllers that afford a more direct style of manipulation of 3D medical imagery. The iMedic interface employs a 3D “multi-touch” type of interaction for manipulation of objects, and self-navigation in space. Medical 3D images of human anatomy from computer tomography (CT) scans were used as a testbed in comparing the two interface: the THI, and a traditional keyboard-and-mouse interface (KMI) commonly used in medical imaging contexts. Novice system users with medical background used each system to carry out navigation, visual search, and measurement tasks with abstract synthetic and realistic anatomical objects. Results indicate that for novice users, there was no clear advantage to either interface in subjective or objective measures. However, a case study of an experienced user showed clear advantages in all tasks using the THI. Reasons for the findings are examined, and interface design implications are discussed.

Interacting in 3D Space: Comparison of a 3D Two-handed Interface to a Keyboard-and-mouse Interface for Medical 3D Image Manipulation

Interacting with computer-generated 3-dimensional (3D) data can pose challenges in the control of 3D objects and navigation in 3D space. The traditional mouse-driven interfaces are limited to controlling two degrees of freedom (DOF) at a time. The current research examines the efficacy of a two-handed interface (THI), “iMedic,” that uses two 6-DOF controllers that afford a more direct style of manipulation of 3D medical imagery. The iMedic interface employs a 3D “multi-touch” type of interaction for manipulation of objects, and self-navigation in space. Medical 3D images of human anatomy from computer tomography (CT) scans were used as a testbed in comparing the two interface: the THI, and a traditional keyboard-and-mouse interface (KMI) commonly used in medical imaging contexts. Novice system users with medical background used each system to carry out navigation, visual search, and measurement tasks with abstract synthetic and realistic anatomical objects. Results indicate that for novice users, there was no clear advantage to either interface in subjective or objective measures. However, a case study of an experienced user showed clear advantages in all tasks using the THI. Reasons for the findings are examined, and interface design implications are discussed.

Implicit but Stable

This study investigates the malleability of explicit and implicit anxiety through mental imagery. Sixty adults imagined themselves in an anxious, calm, or neutral situation. Thereafter, explicit state and trait anxiety were assessed with self-reports, and implicit anxiety was assessed with a variant of the Implicit Association Test. The results indicate that imagery manipulation changed state anxiety in the expected direction. Explicit trait anxiety and implicit anxiety, however, were found to be stable. These findings suggest that the implicit self-concept of anxiety has trait-like characteristics and is as stable against a short-term voluntary mental control strategy as an established explicit measure of trait anxiety.

Perceptual representations in false recognition and priming of pictures

Using a new procedure, we investigate whether imagination can induce false memory by creating a perceptual representation. Participants studied pictures and words with and without an imagery task and at test performed both a direct recognition test and an indirect perceptual identification test on pictorial stimuli. Corrected false recognition rates were 7% for pictures studied in word form (Experiment 1), 26% for pictures imagined once (Experiment 2), and 48% for pictures imagined multiple times (Experiment 3), although on the indirect test, no priming was found for these items. Furthermore, a perceptual/conceptual imagery manipulation did not affect the tendency to claim that imagined items had been studied as pictures (Experiment 4). These results suggest that the false memories reported on direct tests are not driven by perceptual representations.

Effects of Risk-Focused and Recommendation-Focused Mental Imagery on Occupational Risk Communication

This study examined the impact of mental imagery instructions in a National Institute for Occupational Safety and Health (NIOSH) safety document conveying risk and safety information to farmers. A sample of 314 farmers recruited from a large Southeastern state fair was randomly assigned to conditions in a 2 × 2 design. Participants received a NIOSH safety document about skid steer loader safety in which 2 types of mental imagery instructions were manipulated: (a) risk-focused (imagery vs. control) and (b) recommendation-focused (imagery vs. control). Results indicate that risk-focused imagery influenced perceptions of susceptibility to workplace accidents, whereas recommendation-focused imagery influenced attitudes toward engaging in safety behaviors, intentions to share safety information with others, and perceptions of the safety message. Further analyses indicated that ease of imagery partially mediated the relationship between the imagery manipulations and these outcomes. Other potential mechanisms for these effects are discussed.

Reversing spoken items—mind twisting not tongue twisting

Using 12 participants we conducted an fMRI study involving two tasks, word reversal and rhyme judgment, based on pairs of natural speech stimuli, to study the neural correlates of manipulating auditory imagery under taxing conditions. Both tasks engaged the left anterior superior temporal gyrus, reflecting previously established perceptual mechanisms. Engagement of the left inferior frontal gyrus in both tasks relative to baseline could only be revealed by applying small volume corrections to the region of interest, suggesting that phonological segmentation played only a minor role and providing further support for factorial dissociation of rhyming and segmentation in phonological awareness. Most importantly, subtraction of rhyme judgment from word reversal revealed activation of the parietal lobes bilaterally and the right inferior frontal cortex, suggesting that the dynamic manipulation of auditory imagery involved in mental reversal of words seems to engage mechanisms similar to those involved in visuospatial working memory and mental rotation. This suggests that reversing spoken items is a matter of mind twisting rather than tongue twisting and provides support for a link between language processing and manipulation of mental imagery.

Imagery in sentence comprehension: an fMRI study

This study examined brain activation while participants read or listened to high-imagery sentences like The number eight when rotated 90 degrees looks like a pair of spectacles or low-imagery sentences, and judged them as true or false. The sentence imagery manipulation affected the activation in regions (particularly, the intraparietal sulcus) that activate in other mental imagery tasks, such as mental rotation. Both the auditory and visual presentation experiments indicated activation of the intraparietal sulcus area in the high-imagery condition, suggesting a common neural substrate for language-evoked imagery that is independent of the input modality. In addition to exhibiting greater activation levels during the processing of high-imagery sentences, the left intraparietal sulcus also showed greater functional connectivity in this condition with other cortical regions, particularly language processing regions, regardless of the input modality. The comprehension of abstract, nonimaginal information in low-imagery sentences was accompanied by additional activation in regions in the left superior and middle temporal areas associated with the retrieval and processing of semantic and world knowledge. In addition to exhibiting greater activation levels during the processing of low-imagery sentences, this left temporal region also revealed greater functional connectivity in this condition with other left hemisphere language processing regions and with prefrontal regions, regardless of the input modality. The findings indicate that sentence comprehension can activate additional cortical regions that process information that is not specifically linguistic but varies with the information content of the sentence (such as visual or abstract information). In particular, the left intraparietal sulcus area appears to be centrally involved in processing the visual imagery that a sentence can evoke, while activating in synchrony with some core language processing regions.

Retiring the Maid: The Last Joan of Arc Movie

Joan of Arc’s fascination for cinematographers began in 1895. Until 1999, Joan was presented in essentially religious and heroic terms, but then came Luc Besson’s The Messenger. Besson’s Joan, portrayed by Milla Jovovich, is neither heroic nor saintly. Besson’s nontraditional interpretation of the historical facts, and his studied manipulation of archetypal imagery, redefine Joan of Arc as an unbalanced woman explicable by Freudian psychology. In stripping Joan of her heroism and final certainties, the Besson film works to extinguish her value as either religious icon or female role model. More than a review, the following essay on The Messenger is an analysis of the way in which this film completely reshapes the popular image of Joan of Arc.

Subjective and Objective Assessment Methods of Mental Imagery Control: Construct Validations of Self-Report Measures

A study was conducted to examine the relationship between subjective and objective measures of mental imagery control. Eighty college undergraduates completed a battery of imagery tests and self-report measures to examine whether questionnaires that purport to measure imagery control or dynamic imagery ability (imagery of movement) would show a stronger relationship with objective measures of mental manipulation than would subjective measures that tap vividness of static imagery. Neither subjective measures of movement imagery nor subjective measures of stationary imagery showed meaningful relationships with objective measures of visuospatial manipulation. Additionally, subjective and objective imagery measures generally tended to dissociate. Basic component skills thought to be involved in mental manipulation, however, showed a much stronger relationship with the objective imagery tasks than did the self-report questionnaires. Findings suggest that subjective measures of imagery control do not tap the same cognitive processes involved in objective tests that require accurate imagery manipulation.