No / Signs of sensory and perceptual awareness can be observed in people with very severe dementia, and may be influenced by the extent to which the environment offers appropriate stimulation. We developed an observational tool, AwareCare, which care staff can use to identify signs of awareness in residents with very severe dementia, based on the concept of the Wessex Head Injury Matrix (WHIM). Using WHIM items as a guide, and following focus groups with care staff and family members, an expert panel identified 28 environmental stimuli and 35 response categories for the initial version of AwareCare. After baseline assessments of cognition, well-being and quality of life were taken, 40 residents were observed individually for 30 minutes on 5 occasions. Based on the observational data, 10 stimulus categories and 14 response categories were identified for further analysis and formed the final version of AwareCare. All participants showed awareness to varying degrees. Social stimuli elicited the most responses. Greater awareness was associated with better cognitive function, self-care, mobility, and responsiveness, but not with proxy-rated quality of life. Understanding the nature of awareness in this group is an important element in ensuring appropriate levels of interaction and stimulation, and hence enhancing quality of care.

Thesis (Ph.D.)--Indiana University, 2009. / Title from screen (viewed on August 27, 2009). School of Social Work, Indiana University-Purdue University Indianapolis (IUPUI). Advisor(s): Cathy Pike, Hea-Won Kim, Margaret Adamek, Drew Appleby. Includes vita. Includes bibliographical references (leaves 317-330).

Indiana University-Purdue University Indianapolis (IUPUI) / Purpose: Script concordance tests (SCTs) are assessments purported to measure clinical data interpretation. The aims of this research were to (1) test the psychometric properties of SCT items, (2) directly examine the construct validity of SCTs, and (3) explore the concurrent validity of six SCT scoring methods while also considering validity at the item difficulty and item type levels. Methods: SCT scores from a problem solving SCT (SCT-PS; n=522) and emergency medicine SCT (SCT-EM; n=1040) were used to investigate the aims of this research. An item analysis was conducted to optimize the SCT datasets, to categorize items into levels of difficulty and type, and to test for gender biases. A confirmatory factor analysis tested whether SCT scores conformed to a theorized unidimensional factor structure. Exploratory factor analyses examined the effects of six SCT scoring methods on construct validity. The concurrent validity of each scoring method was also tested via a one-way multivariate analysis of variance (MANOVA) and Pearson’s product moment correlations. Repeated measures analysis of variance (ANOVA) and one-way ANOVA tested the discriminatory power of the SCTs according to item difficulty and type. Results: Item analysis identified no gender biases. A combination of moderate model-fit indices and poor factor loadings from the confirmatory factor analysis suggested that the SCTs under investigation did not conform to a unidimensional factor structure. Exploratory factor analyses of six different scoring methods repeatedly revealed weak factor loadings, and extracted factors consistently explained only a small portion of the total variance. Results of the concurrent validity study showed that all six scoring methods discriminated between medical training levels in spite of lower reliability coefficients on 3-point scoring methods. In addition, examinees as MS4s significantly (p<0.001) outperformed their MS2 SCT scores in all difficulty categories. Cross-sectional analysis of SCT-EM data reported significant differences (p<0.001) between experienced EM physicians, EM residents, and MS4s at each level of difficulty. When considering item type, diagnostic and therapeutic items differentiated between all three training levels, while investigational items could not readily distinguish between MS4s and EM residents. Conclusions: The results of this research contest the assertion that SCTs measure a single common construct. These findings raise questions about the latent constructs measured by SCTs and challenge the overall utility of SCT scores. The outcomes of the concurrent validity study provide evidence that multiple scoring methods reasonably differentiate between medical training levels. Concurrent validity was also observed when considering item difficulty and item type.

Legal and scientific imperatives necessitate the validation of a psychometric battery before using it for the purposes of personnel selection and decision- making. The aim of this investigation is to validate a selection battery, i.e. the Ability, Processing of Information and Learning (APIL) Battery and Raven's Advanced Progressive Matrices (APM), used in selecting university bridging - course students. The empirical study is informed by a literature review focussing on the legal and scientific parameters of psychometrics within selection, the conceptualisation of intelligence and its relationship to academic performance. Hypotheses are posed regarding the predictive power of the selection battery and the effect of biographical factors on academic performance. Results indicate that the APU. Battery apd Raven's APM are both valid predictors of academic performance, ·although the former appears more effective. This investigation emphasises the influence of moderating factors, i.e. factors other than cognitive ability, on academic performance. / Industrial and Organisational Psychology / M. Adm. (Industrial and Organisational Psychology)

The purpose of the research was to determine whether personality and measures of ability would significantly predict job performance of call centre operators in a South African communications company. The Customer Contact Styles Questionnaire (CCSQ7.2), the Basic Checking (CP7.1) ability test and the Audio Checking (CP8.1) ability test were completed by operators as the predictors. Supervisors completed the Customer Contact Competency Inventory (CCCI) for 140 operators as a measure of job performance. Performance statistics were obtained for the sample as additional criterion data. Correlations and multiple regression analysis revealed statistically significant small to moderate correlations between the criteria and the predictors. The research was conducted from a concurrent validity perspective. Further research from a predictive validity perspective is suggested in order to substantiate the findings and to improve the generalisability thereof. / Industrial and Organisational Psychology / M.A. (Industrial Psychology)

The purpose of the present study was to determine the concurrent validity of learning potential and psychomotor ability measures for the prediction of haul truck operator (N=128) performance in an open-pit mine. Specific aims were to determine the nature of the relationship between learning potential and psychomotor ability; whether there are higher order cognitive or psychomotor factors present in the combined use of the TRAM 1 and Vienna Test System measures; and the relative contribution of learning potential and psychomotor ability in the prediction of haul truck operator performance. The validity of learning potential and psychomotor ability measures was partially supported. A positive correlation between general (cognitive) ability (g) and psychomotor ability was reported. Factor analysis provided relatively consistent evidence for a general (cognitive) ability factor (g) underlying performance on all measures. The relative contribution of learning potential and psychomotor ability in the prediction of performance could not be established. / Industrial and Organisational Psychology / M. Com. (Industrial and Organisational Psychology)

Text in Afrikaans / Hierdie navorsing handel oor ouderdom en geslag as veranderlikes in die salutogenese paradigma. Die salutogenese paradigma het sy ontstaan en ontwikkeling aan verskeie navorsingsperspektiewe te danke. Daar is reeds op internasionale gebied breedvoerig navorsing oor hierdie paradigma gedoen. In die Suid-Afrika is die navorsing van Strumpfer en Wissing goed bekend. In hierdie navorsing is daar deur middel van faktorontleding gepoog om die onderliggende dimensies van die konstrukte gevoel van koherensie en geharde persoonlikheid bloot te le. Daar is onderskeidelik twee duidelike faktore vir beide konstrukte bepaal. Die faktore op die Lewensorientasievraelys (OLQ) het noue ooreenstemming getoon met die komponente betekenisvolheid en hanteerbaarheid (OLQ1 ), en verstaanbaarheid (OLQ2) soos deur Antonovsky (1987) bespreek. Die faktore op die "Personal Views Survey" (PVS) het ooreenstemming getoon met die komponente verbintenis en beheer (PVS1) en uitdaging (PVS2), soos deur Kobasa (1979) daargestel. Hierdie navorsingsresultate toon verder dat ouderdom wel die mate van gevoel van koherensie wat 'n individu mag ervaar, kan be"invloed. Alhoewel geslag in 'n mindere mate 'n invloed op die mate van gevoel van koherensie getoon het, behoort geslag (in perspektief van die totale steekproef beskou) nie 'n bepalende invloed uit te oefen nie. In terme van die mate van geharde persoonlikheid wat 'n individu mag ervaar, het ouderdom en geslag geen invloed getoon nie. Daar is ook geen interaksie-effek tussen ouderdom en geslag en die onderskeie konstrukte vasgestel nie. / This research project deals with age and gender as variables in the salutogenesis paradigm. The salutogenesis paradigm owes its origin and development to various research projects. Research in the international field has already been done on this paradigm on a wide sphere. The research of Strumpfer and Wissing is well known in South Africa. In this area of research an attempt is made through the analysis of factors to expose the underlying dimensions of the construct sense of coherence and the construct hardy personality. Two certain factors for both constructs have been indicated. The factors influencing the Orientation to Life Questionnaire indicated a close resemblance with the components of meaningfulness and manageability (OLQ1), and comprehensibility (OLQ2), discussed by Antonovsky (1987). The factors of the Personal Views Survey (PVS) demonstrated a similarity with the components commitment and control (PVS 1) and challenge (PVS2), as stated by Kobasa (1979). The results of this research demonstrates that age may well influence the measure of the sense of coherence which an individual may experience. Although gender indicated a minor measure of influence on the degree of sense of coherence, gender should not (in perspective of this research findings) have a deciding influence. Age and gender indicated no deciding influence in the measure of hardy personality experienced by an individual. Age and gender did not manifest any interaction in the various constructs. / Industrial and Organisational Psychology / M. Com. (Bedryfsielkunde)

This study empirically compares the Classical Test Theory (CTT) and the Partial Credit Model (PCM) of Rasch focusing on the invariance of item parameters. The invariance concept which is the consequence of the principle of specific objectivity was tested in both CTT and PCM using the results of learners who wrote the National Senior Certificate (NSC) Mathematics examinations in 2010. The difficulty levels of the test items were estimated from the independent samples of learn- ers. The same sample of learners used in the calibration of the difficulty levels of the test items in the PCM model were also used in the calibration of the difficulty levels of the test items in CTT model. The estimates of the difficulty levels of the test items were done using RUMM2030 in the case of PCM while SAS was used in the case of CTT. RUMM2030 and SAS are both the statistical softwares. The analysis of variance (ANOVA) was used to compare the four different design groups of test takers. In cases where the ANOVA showed a significant difference between the means of the design groups, the Tukeys groupings was used to establish where the difference came from. The research findings were that the test items' difficulty parameter estimates based on the CTT theoretical framework were not invariant across the different independent sample groups. The over- all findings from this study were that the CTT theoretical framework was unable to produce item difficulty invariant parameter estimates. The PCM estimates were very stable in the sense that for most of the items, there was no significant difference between the means of at least three design groups and the one that deviated from the rest did not deviate that much. The item parameters of the group that was representative of the population (proportional allocation) and the one where the same number of learners (50 learners) was taken from different performance categories did not differ significantly for all the items except for item 6.6 in examination question paper 2. It is apparent that for the test item parameters to be invariant of the group of test takers in PCM, the group of test takers must be heterogeneous and each performance category needed to be big enough for the proper calibration of item parameters. The higher values of the estimated item parameters in CTT were consistently found in the sample that was dominated by the high proficient learners in Mathematics ("bad") and the lowest values were consistently calculated in the design group that was dominated by the less proficient learners. This phenomenon was not apparent in the Rasch model. / Mathematical Sciences / M.Sc. (Statistics)

The purpose of this research was to investigate the effect that mode of test administration could have on computerised assessment results involving proctored and unproctored test conditions. Two South African test instruments, the Learning Potential Computerised Adaptive Test (LPCAT) and the Career Preference Computerised Adaptive Test (CPCAT) were used in the study. A quantitative, quasi-experimental design was used, and a convenience sample for LPCAT (N=82) and CPCAT (N=81) consisted of employees in the hospitality industry. Using a within-participants design, the dependent t-test was used for statistical analysis. For the total group the LPCAT results yielded no statistically significant differences between the mean scores for the two different modes of administration. For the total group the CPCAT results yielded statistically significant differences in the mean scores per mode of administration for five out of 34 dimensions, however, for the majority of the CPCAT sub-dimensions, the mode of administration did not impact on results. It was concluded that mode of administration did not impact on the cognitive test scores and only to a very limited degree on the non-cognitive test scores. Based on the results the null hypotheses for the effect of mode of administration were not rejected. / Industrial & Organisational Psychology / M.A. (Industrial and Organisational Psychology)

In the last decades a number of studies have shed light on early modern scientific experience. While some of these studies have focused on how new facts were forced out of nature in so-called experimental situations, others have charted long-term transformations. In this dissertation I explore a rather different facet of scientific experience by focusing on the case of the Prussian university town Halle in the period from the late seventeenth till the mid-eighteenth century. At this site philosophers, theologians and physicians were preoccupied with categories such as inner senses, inner experience, living experience, psychological experiments and psychometrics. In the study I argue that these hitherto almost completely overlooked categories take us away from observations of external things to the internal organisation of experience and to entirely internal objects of experience. Rather than seeing this internal side of scientific experience as mere theory and epistemology, I argue that it was an integral and central part of what has been referred to as the cultura animi tradition, that is, the philosophical and medical tradition of approaching the soul as something in need of cultivation, education, disciplination and cure. The study contains four empirical chapters. In the first chapter I analyse the meaning and function of experience in Christian Wolff’s philosophy understood as spiritual exercise and cultura animi. In the second chapter I examine experience in the theologian Hermann Francke’s cultura animi, focusing particularly on the relation between scientific experience and what scholars have referred to as religious experience. In the third chapter I chart aesthetic experience in Alexander Baumgarten’s aesthetics. In the fourth chapter I examine the role of experience in the medicine of Georg Ernst Stahl, Friedrich Hoffmann and their followers. The analysis of medical experience channels the discussion into questions regarding the relation between the cultura animi tradition and the kind of attitudes, practices and processes that have been connected to modern objectivity.