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Experimentally Examining The Proposed Relationships Among “Rehearsal-Based” Effects, Corey Ian Mcgill
Experimentally Examining The Proposed Relationships Among “Rehearsal-Based” Effects, Corey Ian Mcgill
LSU Doctoral Dissertations
Despite the importance of rehearsal to most models of verbal working memory, its role has been recently called into question. Much prior work in support of rehearsal models has centered on the experimental effects of word-length, phonological-similarity, and irrelevant sound on serial order recall performance and the interaction of all three with concurrent articulation. However, recent research has suggested that confounding effects of stimuli, such as orthographic neighborhood, may be the true cause of the word-length effect. While these findings alone have significant implications for modern models of rehearsal, to understand them within the context of modern theories of working …
Examining The Boundary Conditions Between Cognitive Control And Interference Derived From Stimulus-Based And Response-Based Conflict, Jonathan D. Tall
Examining The Boundary Conditions Between Cognitive Control And Interference Derived From Stimulus-Based And Response-Based Conflict, Jonathan D. Tall
LSU Doctoral Dissertations
Cognitive control is a broad construct that defines a set of processes involved in maintaining task goals in response to interference. Working memory capacity (WMC) is a similarly defined construct that shares many overlapping functions with cognitive control. The studies presented used controlled forms of interference to identify limits, or boundary conditions, that could help clarify the relationship between cognitive control and WMC. Experiment 1 used context effects to manipulate how interference and cognitive control could overlap. A spatial Stroop/Simon task was used in which proportion congruency for each subset (e.g., Simon or spatial Stroop) was manipulated to produce a …
Working Memory, Processing Speed, And Academic Achievement In Adults With Adhd, Alyse Barker Blanchard
Working Memory, Processing Speed, And Academic Achievement In Adults With Adhd, Alyse Barker Blanchard
LSU Doctoral Dissertations
In Barkley’s (1997a, 1997b) model of attention-deficit/hyperactivity disorder (ADHD), he proposes that working memory deficits resulting from ADHD may cause impairments in reading comprehension. ADHD has been associated with poorer processing speed and working memory as well as academic underachievement in some studies. However, more research is needed examining the relationship between ADHD, working memory, processing speed, and academic achievement in adults to help elucidate the neuropsychological correlates of ADHD and their potential impact on academic functioning. The aim of the current study is to examine the relationship between ADHD, verbal working memory performance, processing speed, and academic achievement in …
Creating An Sli Performance Profile With Load, Christy Marie Seidel
Creating An Sli Performance Profile With Load, Christy Marie Seidel
LSU Doctoral Dissertations
The purpose of this body of work was to gain a clearer understanding of the potential cognitive factors that may contribute to Specific Language Impairment (SLI). This study attempted to simulate a performance profile of SLI in typically developing children within a grammaticality judgment task, featuring structures historically difficult (third person singular –S and auxiliary BE) and easy (plural –S and progressive –ING) for individuals with SLI. Cognitive load was manipulated through the length of the sentences to be judged, and individual differences in phonological short term memory (PSTM) and working memory were measured (WM). For a successful simulation to …
Examining Reliability And Validity Of The Roadsign Perception Test, Justin Hull Ory
Examining Reliability And Validity Of The Roadsign Perception Test, Justin Hull Ory
LSU Master's Theses
The Road Sign Perception Test (RSPT) is a newly developed assessment procedure related to driver advisement, and its psychometric properties have not yet been examined systematically. The present study examined the construct validity and the reliability of RSPT measurements. Cronbach’s α and test-retest reliability statistics were completed, as were correlations reflecting on the test’s construct validity. Results indicated that the RSPT possesses marginal test-retest reliability, adequate internal consistency for duration of stimulus presentation and for specific stimuli, but low for number of signs presented. RSPT performance was significantly correlated with convergent variables measuring aspects of attention, working memory, and spatial …
The Interactions Between Sentence Complexity, Working Memory, And Additional Working Memory Load: An On-Line Measure, Christy Seidel
The Interactions Between Sentence Complexity, Working Memory, And Additional Working Memory Load: An On-Line Measure, Christy Seidel
LSU Master's Theses
This experiment takes an on-line look at syntactical complexity, external loads, and working memory, and how the three influence one another. Based on off-line data looking at the interactions between these three factors, we have discovered that syntactic complexity and span have main effects, while the effect of load is most interestingly seen in a three way interaction representing the hardest possible combination of factors. Through this new design, we were able to see whether the off-line results of sentence processing are replicated with an on-line measure. Our new off-line findings replicate past results, which show that working memory impacts …
The Effects Of Auditory Distraction On Attention Performance In Asymptomatic College Students With A History Of Mild Head Injury, John H.,Ii Denning
The Effects Of Auditory Distraction On Attention Performance In Asymptomatic College Students With A History Of Mild Head Injury, John H.,Ii Denning
LSU Doctoral Dissertations
Introduction: The majority of individuals experiencing a mild head injury (MHI) recover fully experiencing few residual symptoms. Some individuals who fully recover have shown evidence of residual, albeit subtle, brain functioning disturbances on tasks requiring high levels of cognitive effort. Also, memory complaints in MHI patients may be related to these subtle difficulties when cognitive resources are overwhelmed. This study assessed a group of asymptomatic college students with a history of MHI to determine if there were any residual attention difficulties as well as increased memory complaints. Method: One-hundred twelve college students with and without a history of MHI were …