Clinical neuropsychologists who assess patients following mild closed head injury (CHI) are often asked to offer an opinion whether there is evidence of malingering. Factors that impact the ability of a person to intentionally portray impairment are quite important since mis-diagnosis of malingering can result in delayed treatment. In this study knowledge of the sequelae of mild CHI was provided to normal college students in an effort to change reporting of symptoms and influence the type of malingering strategy used when completing the Neuropsychological Symptom Inventory (NSI). Subjects were randomly assigned to either a prior knowledge malingering group (PK;N=57), no prior knowledge malingering group (NPK;N=58), or control group (CON;N=61). The results showed that PK subjects endorsed more general and attention/concentration symptoms than NPK or CON subjects. The results also showed PK subjects were as likely to be detected by the NSI lie scale as NPK subjects. Thus, the NSI lie scale demonstrated sensitivity to malingering despite subjects having brief instruction about mild CHI. Also, having prior knowledge did not result in significantly different strategies when completing the NSI. Instead, both malingering groups reportedly used exaggeration and attempted to be consistent as frequent strategies. / Department of Educational Psychology

Graduation date: 2006

A differential diagnosis between head injury and depression is critical to ensure proper treatment and appropriate interventions. Knowledge about this can only aid counseling psychologists' work with this population and, identifying a measure that can assist in this process is essential. The purpose of this study is to measure the utility of the Dean — Woodcock Neuropsychological Assessment System (D-WNAS) in distinguishing individuals with head injury from those who have a primary diagnosis of depression, and general neurological impairment. Participants included 433 adults (222 males, 211 females) between the ages 20-55 years of age (mean = 35.3 years, SD = 10.97 years) from the Midwestern United States. During the individual's treatment in the neuropsychological laboratory, each person was administered the following: the Dean-Woodcock Structured Interview (Dean & Woodcock, 1999), mental status exam, the Woodcock Johnson — Revised Tests of Cognitive Ability (WJ-R COG; Woodcock & Johnson, 1989b), the Woodcock Johnson — Revised Tests of Achievement (WJ-R ACH; Woodcock & Johnson, 1989a), and the Dean-Woodcock Sensory Motor Battery (DWSMB; Dean & Woodcock, 1999). This study indicates that responses to D-WNAS can be used to reliably classify adults into groups of depression, head injury, and general neuropsychological impairment. In particular, responses to the D-WSMB portion of the D-WNAS can be used to reliably classify adults into groups of depression, head injury, and general neuropsychological impairment. Classification results revealed that the original grouped cases were classified with 62.6 % (p < .001) accuracy and with 73.2% overall accuracy when the head injury and general neurological impairment groups were combined and compared to depression and normative groups. The WJ-R COG and WJ-R ACH were not as reliable as the D-WSMB at predicting group membership. / Department of Counseling Psychology and Guidance Services

Dissertation submitted in partial fulfilment of the requirements for the Master’s Degree in Technology: Chiropractic, Durban University of Technology, 2010. / Motion palpation is an examination technique commonly used by chiropractors to identify a manipulable subluxation prior to manipulation. In order for its continued use, it must be validated. Many studies conducted on motion palpation’s inter-examiner reliability in the spine have shown it to be below average, however only a few studies have addressed its use in the extremity joints. No inter-examiner reliability studies on motion palpation were found for the elbow, let alone the symptomatic elbow with regards to chronic lateral epicondylalgia, a common disorder of the elbow effectively treated by the use of manipulation. Objectives The objectives of this study were to determine the inter-examiner reliability of motion palpation of the elbow for the asymptomatic elbow and the symptomatic elbow with regards to chronic lateral epicondylalgia. It also aimed to compare these results to determine any difference in reliability, the number of manipulable subluxations and the presence of manipulable subluxations in particular directions, between the two groups. Method Twenty participants (n=40 elbows) between the ages of 18 to 65, with one asymptomatic and one symptomatic elbow (chronic lateral epicondylalgia) were examined by three final year masters chiropractic students for the presence of manipulable subluxations in end play, using only motion palpation. The examiners were pre-trained, randomised and blinded. Each examiner individually motion palpated both elbows on each participant, in nine directions of motion palpation, incorporating the humeroulnar and proximal radioulnar joints. They were also required to identify which elbow was symptomatic. Fleiss’ kappa and percentage agreement (perfect percentage agreement and mean percentage agreement) were used to measure reliability. Paired non parametric Wilcoxon signed ranks compared the difference between both groups and McNemar’s chi square tests assessed the percentage of correctly identified symptomatic elbows for each examiner. A p value <0.05 was considered statistically significant. iv Results The asymptomatic elbows showed a poor range of kappa results, from 0.0683 to -0.1321, with a mean kappa of -0.0664. Perfect percentage agreement was 50% to 85% and mean percentage agreement was 83.30% to 94.99%. The symptomatic elbows’ kappa values ranged between -0.2691 to 0.4034 with a mean kappa of -0.0028. The humeroulnar medial to lateral direction of motion palpation had a moderate kappa value of 0.4034. Perfect percentage agreement ranged from 10% to 85% and mean percentage agreement from 69.94% to 94.99%. There was an insignificant difference in kappa values between the two groups (p=0.260), although there was a trend towards the asymptomatic kappa values being lower than the symptomatic values. The difference between symptomatic and asymptomatic elbows was significant in proximal radioulnar posterior to anterior glide in pronation (p=0.013), as well as proximal radioulnar rotation of the radial head on the ulna (p=0.008). Overall, more manipulable subluxations were found in the symptomatic elbows than in the asymptomatic elbows. The examiners correctly identified the symptomatic elbow in 65% to 90% of participants (p=1.000). Conclusions and Recommendations In conclusion, the inter-examiner reliability of motion palpation in the asymptomatic elbow was poor, and in the symptomatic elbow (chronic lateral epicondylalgia), poor to moderate. There was an insignificant difference in reliability between the two groups, although more manipulable subluxations were found in the symptomatic elbows overall. These were mainly in proximal radioulnar posterior to anterior glide in pronation, as well as proximal radioulnar rotation of the radial head on the ulna, two directions of motion that form part of Mills’ manipulation. This study also found that examiners were able to identify the symptomatic elbows with the use of motion palpation. It is recommended that future research continue from this study in assessing the identification and presence of manipulable subluxations in all the extremity joints. However the methodological problems with the statistical analysis need to be addressed.

published_or_final_version / Electrical and Electronic Engineering / Master / Master of Philosophy

published_or_final_version / abstract / Medicine / Master / Doctor of Medicine

published_or_final_version / Diagnostic Radiology / Doctoral / Doctor of Philosophy

The capacity of Raven's Standard Progressive Matrices (SPM) and the Booklet Category Test (BCT) to discriminate between groups of brain-injured, simulated malingering, and normal participants was investigated in this study. Exploratory analyses were also conducted to examine the differences between groups categorized as sophisticated and naive fakers. Clinical decision rules and discriminant function analyses were utilized to identify malingerers. Clinical decision rules ranged in hit rates from 41% to 78%, in sensitivity from 2% to 100%, and in specificity from 86% to 100%. Discriminant functions ranged in hit rates from 81% to 86%, in sensitivity from 68% to 73% and in specificity from 82% to 87%. Overall, the least helpful detection method examined was below chance responding on either measure, while the most efficient was gross errors for SPM.

The purpose of this study was to examine the utility of the Dean-Woodcock Sensory Motor Battery (DWSMB) as a diagnostic tool for identifying individuals with and without closed-head injury, comparing the predictive power of a two- and three-factor representation (DWSMB; Dean & Woodcock, 2003). The current study's major research questions focused on the predictive utility of the structure of the DWSMB. The simplified two-factor model (Total Sensory and Total Motor), based on the DWSMB manual (Dean & Woodcock), was compared to a three-factor theoretical model (Basic Sensory, Higher Sensory and Motor Functions) (R.S.Dean, personal communication, March 29, 2006) for this study. Logistic Regression was used to analyze the data. Results from this study demonstrate that when using the two-factor solution, the overall correct prediction of group membership was 73.8 % (59.4% for CHI and 85.2% for normals). The Total Motor Impairment variable was the only meaningful predictor. The results from the three-factor solution show an 84.2 % overall correct prediction rate (71.4 % for CHI and 95.1 % for normals). The significant contributors for identifying CHI when using the three-factor model included Basic Sensory and Motor Functions. Everything favors the three-factor model as being more precise. All indicators of prediction accuracy and goodness of fit favored the three-factor model. Based on these results, the DWSMB was determined to be a good screening instrument for identifying children in school contexts who should be referred for a neuropsychological examination to confirm pre-existing CHI that interfere with school functioning. / Department of Educational Psychology

Dissertation submitted in partial compliance with the requirements for the Masters Degree in Technology: Chiropractic, Durban University of Technology, 2010. / The aim of this study was to determine the inter-examiner reliability of motion palpation to detect joint dysfunction in hindfoot and midfoot joints of asymptomatic feet and feet with chronic ankle instability syndrome. The rationale for this study was that motion palpation is a commonly used assessment tool that is used by the chiropractic profession to detect the need for manipulation of the spine and extremities. Also until the reliability of motion palpation is known, other studies using motion palpation as an assessment tool to detect the need for manipulation in the hindfoot and midfoot are questionable. The study was conducted at Durban University of Technology (DUT). Patients that responded to the adverts were then screened via telephonic interview. The researcher performed a case history, physical examination and a foot and ankle regional examination on each patient. Three masters chiropractic students then independently assessed both the symptomatic and asymptomatic feet of each patient and recorded their results. The data was then statistically analysed using SPSS version 15. It was found that the inter-examiner reliability of motion palpation for detecting restrictions in feet with chronic ankle instability syndrome was fair and for detecting instability, there was moderate reliability. In the asymptomatic group the examiners showed to have poor reliability in detecting restrictions and moderate reliability in detecting instability. Inter-examiner reliability was better in the symptomatic group and in this group examiners had more agreement on detecting instability as opposed to restrictions. This study has showed that inter-examiner reliability ranged from poor to moderate in the symptomatic and asymptomatic group with the reliability ranging from poor to moderate. Therefore, one can conclude that motion palpation can be used as an assessment tool to detect joint dysfunction in hindfoot and midfoot joints. However, further studies are warranted to address other subjective and objective measurements such as tenderness and range of motion together with motion palpation.