Visual perception plays a fundamental role in a prospective learner’s ability to learn to read and spell; as well as in the accomplishment of written and numeracy tasks. Aspects of visual perception are facilitating functions and skills which a learner requires for acquiring basic literacy and numeracy proficiency. Yet, despite this importance, there exists no test that is standardised for the South African Foundation Phase population which adequately measures distinct visual perceptual aspects of individual learners. The study was undertaken in an attempt to alleviate the dilemma of the South African Foundation Phase learners who tend to experience visual perceptual challenges that hamper their level of academic learning, performance and competency. Firstly, the literature study explored the construct of visual perception and focussed on the relationship between vision, visual perception and academic learning, performance and competency. Secondly, in order to adequately measure the South African Foundation Phase population’s visual perceptual level of proficiency a new test was developed. Based on the literature study and the empirical investigation recommendations to educational psychologists, teachers, parents and learners have been made. / Educational Studies / M.Ed. (Guidance and Counselling)

Contemporary understanding of human visual spatial attention rests on the hypothesis of a top-down control sending from cortical regions carrying higher-level functions to sensory regions. Evidence has been gathered through functional Magnetic Resonance Imaging (fMRI) experiments. The Frontal Eye Field (FEF) and IntraParietal Sulcus (IPS) are candidates proposed to form the frontoparietal attention network for top-down control. In this work we examined the influence patterns between frontoparietal network and Visual Occipital Cortex (VOC) using a statistical measure, Granger Causality (GC), with fMRI data acquired from subjects participated in a covert attention task. We found a directional asymmetry in GC between FEF/IPS and VOC, and further identified retinotopically specific control patterns in top-down GC. This work may lead to deeper understanding of goal-directed attention, as well as the application of GC to analyzing higher-level cognitive functions in healthy functioning human brain. / by Wei Tang. / Thesis (Ph.D.)--Florida Atlantic University, 2011. / Includes bibliography. / Electronic reproduction. Boca Raton, Fla., 2011. Mode of access: World Wide Web.

This study investigated whether age differences in deceit detection are related to impairments in emotion recognition. Key cues to deceit are facial expressions of emotion (Frank and Ekman, 1997). The aging literature has shown an age-related decline in decoding emotions (e.g., Malatesta, Izard, Culver, and Nicolich, 1987). In the present study, 354 participants were presented with 20 interviews and asked to decide whether each man was lying or telling the truth. Ten interviews involved a crime and ten a social opinion. Each participant was in one of three presentation conditions: 1) visual only, 2) audio only, or 3) audio-visual. For crime interviews, age-related impairments in emotion recognition hindered older adults in the visual only condition. In the opinion topic interviews, older adults exhibited a truth bias which rendered them worse at detecting deceit than young adults. Cognitive and dispositional variables did not help to explain the age differences in the ability to detect deceit.

Doctorat en sciences psychologiques / info:eu-repo/semantics/nonPublished

Internal consistency reliability and validity were established for a new 31 item Imagery Manipulation Scale. Previous attempts to correlate subjectively rated control of visual imagery with tests of spatial ability have been unsuccessful. However, no attempt to construct a subjectively rated control of imagery scale was located which tried to establish internal consistency reliability and both content and construct validity. Further, no research was located in which subjects were requested to rate their imagery ability utilized during the performance of the actual spatial tasks used to try to establish validity. A new scale of subjectively rated control of imagery was devised in which subjects were requested to rate their imagery while solving spatial tasks which involved visualizing the manipulation of geometric forms. Content validity was established by analyzing the transformation involved while solving the spatial problems. Internal consistency reliability for the 31 item scale was established across two samples. Validity was established with the second sample (100 university students: 26 male and 74 female). The task utilized to provide validity could be objectively scored, and was made up of four spatial subtests, which were adapted from the Vandenberg and Kuse Mental Rotations Test, the Kosslyn Directions Test, performed in both the forward and backward direction, and a block task utilized by Snyder. A convergent and discriminant validity analysis established construct validity. Further, the hypotheses of three investigators, Kosslyn, Shepard and his colleagues, and Snyder, were supported by the results of the present investigation, thus substantiating the conclusion that reported control of imagery processing can be operationalized with performance scores on spatial ability tasks.

Indiana University-Purdue University Indianapolis (IUPUI) / The purpose of the current study was to investigate the impact of emotionality on the memory of children with an autism spectrum disorder. Although emotional events enhance memory in adults and children without an autism spectrum disorder, there are different memory patterns among individuals on the autism spectrum. Specifically, individuals with autism may show a decreased advantage in memory for emotional content and may have deficits in memory for information that is not presented visually. Currently, however, there are no studies that look at how emotional content affects memory specifically in children with autism. In the current study, children with and without autism were presented with stimuli contrasting emotional and neutral content using one of two modalities, auditory and visual, and then completed memory recognition tasks for the stimuli. Results indicate that children with an autism spectrum disorder did not demonstrate enhanced memory for emotional information. Rather, they were equally able to remember emotional and neutral stimuli. Additionally, individuals on the spectrum demonstrated better memory for visual stimuli compared to their neurotypical peers. These results support the notion that individuals with an autism spectrum disorder may learn and remember material differently than those without the disorder and that educators need to acknowledge these differences as children with autism spectrum disorders continue to be integrated into classroom settings.

Indiana University-Purdue University Indianapolis (IUPUI) / In today’s workforce, multitasking on the job has become increasingly important. However, past research has characterized multitasking primarily as a counterproductive work strategy. Drawing from the theory of person-job (PJ) fit, in this this study it is proposed that multitasking may not always result in performance decrements but rather that people’s perceptions and experiences of multitasking may differ depending on individual differences. The theory of PJ fit suggests positive outcomes when there is a match between employee preferences, abilities and job characteristics. Using this framework, this study proposes the concept of multitasking fit and predicts that a match between multitasking preferences and multitasking job demands will result in positive work attitudes. Lastly, it is predicted that higher working memory will lead to higher job performance, especially in jobs requiring higher amounts of multitasking. This study found that PJ fit had generally positive effects on work-related outcomes such as job satisfaction, organizational commitment, turnover intentions, and strains. Due to measurement issues, the relationship between working memory and job performance could not be assessed. However, the results of this study relating to PJ fit suggest that perhaps multitasking is not always a bad strategy within the workplace and that its consequences may instead depend on the degree of fit between an individual and his or her working environment.

Indiana University-Purdue University Indianapolis (IUPUI) / Ecological momentary assessment (EMA) has been asserted by proponents of the technique as being superior to standard paper-and-pencil measurements in terms of the reliability and validity of the information obtained; however, this claim has not yet been fully evaluated in the literature. Accordingly, the purpose of this study was to evaluate one aspect of this assertion by comparing the utility of EMA and retrospective measures of depressive symptoms in predicting health-relevant biological and behavioral outcomes. It was hypothesized that (1) the EMA measure will have better predictive utility when examining objective sleep quality (a biological outcome), and that (2) the retrospective measure will have better predictive utility when examining blood donation intention (a behavioral outcome). Ninety-six undergraduate females participated in this 2-week study. Depressive symptoms were measured momentarily and retrospectively using the Center for Epidemiological Studies-Depression Scale (CES-D). The biological outcome was assessed by actigraphy, whereas the behavioral outcome was measured via a self-report questionnaire. Unfortunately, it was not possible to fully test these hypotheses due to the failure to observe relationships between the predictor variables and the outcomes. The reported results, although limited, did not provide support for the hypotheses. Supplemental analyses revealed a moderate to high amount of shared variance between the EMA and retrospective measures, a similar extent of random error in both measures, and potentially a greater degree of systematic error in the retrospective measure. Due to the paucity of literature examining the claim of superior reliability and validity of EMA versus retrospective measures, as well as the failure of the current study to evaluate this assertion sufficiently, it appears that this claim remains unfounded. Therefore, suggestions for future research are provided.

Visual perception is a psychological construct that describes the awareness of visual sensations and arise from the interactions of the individual or observer in the external environment together with the physiology of the observer’s visual system. A variety of theories of the development of visual perception have led to the development of different psychometric measures aimed at quantifying the cognitive construct. The Visual Perceptual Aspects Test was developed by Clutten (2009) to measure nine different constructs of visual perception. The original VPAT was validated using content and construct validity based on a Western Cape sample. However, to the researcher’s knowledge, a factor analysis had not yet been conducted on the VPAT to determine the factor validity of the test. Furthermore, no measures of validity or reliability had been conducted on the VPAT using a sample outside of the Western Cape. The aim of this research is to validate the hypothesised nine factor structure of the Visual Perceptual Aspects Test, using a confirmatory factor analysis, exploratory structural equation model, a bifactor confirmatory factor analysis and a bifactor exploratory structural equation model. The results of the analysis showed marginal model fit of the VPAT with the sample data, with sufficient levels of reliability for certain sub-tests. However, the VPAT did not meet significant levels of validity or reliability of the proposed model structure of the VPAT for the sample group of learners based in the Eastern Cape. / Psychology / M.A. (Research Psychology)