Sum Score Of Items Research Articles

INVESTIGATING STUDENTS’ ATTITUDE TOWARDS SCIENCE IN THE COLLEGES OF EDUCATION

The study investigated the attitude of teacher trainees towards the study of science in the Colleges of Education in Ghana. It looked at the students’ attitude from four main perspectives; their motivation (encouragement) to learn science, their interest (enjoyment) in science lessons, their level of involvement (participation) in science lessons, and the type of interpersonal relationship that exist between them and their science tutors. A twenty (20) - item questionnaire on a five-point Likert-type scale for students was used to collect data on students’ attitude towards science. The respondents consisted of one hundred and fifty (150) students from the Colleges of Education in Ghana, namely Foso College of Education, Enchi College of Education, and Komenda College of Education. The attitude of the students was determined by descriptive analysis by calculating the average (mean) score (X/N) for each dimension (i.e., sum score of items under a dimension, X divided by the total number of responded items, N for dimension). Since attitude students have towards science are influential in determining their performance in science, this study hoped to find out the extent to which students in the selected colleges of education possess the four positive attitudes measured in this study. The result produced indicated that the students possessed none of the positive attitudes towards the study of science.

On Dimensionality, Measurement Invariance, and Suitability of Sum Scores for the PHQ-9 and the GAD-7.

In psychiatry, severity of mental health conditions and their change over time are usually measured via sum scores of items on psychometric scales. However, inferences from such scores can be biased if psychometric properties such as unidimensionality and temporal measurement invariance for instruments are not met. Here, we aimed to evaluate these properties for common measures of depression (Patient Health Questionnaire-9) and anxiety (Generalized Anxiety Disorder Assessment-7) in a large clinical sample (N = 22,362) undergoing psychotherapy. In addition, we tested consistency in dimensionality results across different methods (parallel analysis, factor analysis, explained common variance, the partial credit model, and the Mokken model). Results showed that while both Patient Health Questionnaire-9 and Generalized Anxiety Disorder Assessment-7 are multidimensional instruments with highly correlated factors, there is justification for sum scores as measures of severity. Temporal measurement invariance across 10 therapy sessions was evaluated. Strict temporal measurement invariance was established in both scales, allowing researchers to compare sum scores as severity measures across time.

Data Integration Methods for Phenotype Harmonization in Multi-Cohort Genome-Wide Association Studies With Behavioral Outcomes.

Parallel meta-analysis is a popular approach for increasing the power to detect genetic effects in genome-wide association studies across multiple cohorts. Consortia studying the genetics of behavioral phenotypes are oftentimes faced with systematic differences in phenotype measurement across cohorts, introducing heterogeneity into the meta-analysis and reducing statistical power. This study investigated integrative data analysis (IDA) as an approach for jointly modeling the phenotype across multiple datasets. We put forth a bi-factor integration model (BFIM) that provides a single common phenotype score and accounts for sources of study-specific variability in the phenotype. In order to capitalize on this modeling strategy, a phenotype reference panel was utilized as a supplemental sample with complete data on all behavioral measures. A simulation study showed that a mega-analysis of genetic variant effects in a BFIM were more powerful than meta-analysis of genetic effects on a cohort-specific sum score of items. Saving the factor scores from the BFIM and using those as the outcome in meta-analysis was also more powerful than the sum score in most simulation conditions, but a small degree of bias was introduced by this approach. The reference panel was necessary to realize these power gains. An empirical demonstration used the BFIM to harmonize aggression scores in 9-year old children across the Netherlands Twin Register and the Child and Adolescent Twin Study in Sweden, providing a template for application of the BFIM to a range of different phenotypes. A supplemental data collection in the Netherlands Twin Register served as a reference panel for phenotype modeling across both cohorts. Our results indicate that model-based harmonization for the study of complex traits is a useful step within genetic consortia.

Intelligence Is What the Intelligence Test Measures. Seriously

The mutualism model, an alternative for the g-factor model of intelligence, implies a formative measurement model in which “g” is an index variable without a causal role. If this model is accurate, the search for a genetic of brain instantiation of “g” is deemed useless. This also implies that the (weighted) sum score of items of an intelligence test is just what it is: a weighted sum score. Preference for one index above the other is a pragmatic issue that rests mainly on predictive value.

Adolescents at risk of psychosis have higher level of hopelessness than adolescents not at risk of psychosis

Background: Hopelessness has been a widely studied phenomenon in psychotic disorders. However, previous evidence of hopelessness in at-risk state of psychosis is lacking. The primary aim of the present study was to investigate associations between at-risk state of psychosis and the level of hopelessness, the secondary aim being to investigate, at item-level, hopelessness differences in hopelessness profile of adolescents at risk of psychosis. Methods: Hopelessness was assessed with the Beck Hopelessness Scale (BHS) and risk of psychosis with the PROD screen by an early detection team at the Helsinki University Central Hospital in a sample of 200 help-seeking adolescents between 11 and 22 years of age. Of them, 66 were classified as belonging to the at-risk of psychosis group and 134 to the not-at-risk of psychosis group. Results: The at-risk group scored higher in total sum scores of hopelessness than the not-at-risk group (9.15 vs. 6.63, P = 0.002). In an additional analysis of the BHS, the sub-item “I have great faith in the future” (P < 0.001) differed by risk status of psychosis after correction for multiple analysis. In a logistic regression analysis, BHS subfactor III (sum scores of items “I can't imagine what my life would be like in 10 years” and “I don't expect to get what I really want”) explained (P = 0.047) the at-risk status of psychosis after age, gender and other BHS subfactors had been adjusted for. Conclusions: Adolescents at risk of psychosis have higher hopelessness than other help-seekers. In light of a heightened possibility of suicidal behaviour, psychiatric care should pay attention to these findings.

Changes in toothbrushing frequency in relation to changes in oral health‐related knowledge and attitudes among children – a longitudinal study

The aim of this study was to determine the associations between changes in self-reported toothbrushing frequency and the knowledge and attitudes related to oral health. The study population consisted of all fifth and sixth graders who started the 2001-2002 school year in Pori (n = 1,691); of these, 1,362 were monitored throughout the 3.4-yr study. Data were gathered by questionnaires before, in the middle, and after the follow-up, which was divided into two periods. Associations between changes in toothbrushing frequency, sum score of knowledge items, and sum scores of items in attitudinal factors were studied. The attitudinal factor structure was determined by principal component analyses. The associations were evaluated using mean values and general linear models for repeated measures. Toothbrushing frequency and knowledge and attitudes related to oral health improved among the same children during the study, with the changes usually taking place in the same time-period. In different time-periods, different children's toothbrushing and oral health-related knowledge and attitudes improved. Based on our results, changes in knowledge, attitudes, and behavior are related, but children are ready for change at different times. Therefore, oral health promotion should be designed to be a continuous process rather than a short-term intervention.

Matters of Conscience and Conscientiousness: The Place of Ego Developmentin the Five-Factor Model

The Five-factor model (FFM; Digman, 1990; Goldberg, 1990) and Loevinger's (1994) theory of ego development are two active research traditions that are often construed as incompatible approaches to the study of personality. For example, each theory proposes a different view of the concept of conscientiousness. Loevinger argued that FFM conscientiousness, which emphasizes attributes such as order, self-discipline, and achievement striving, lacks a moral component and is more similar to the conformist stage in her theory. To investigate these claims, we administered the Revised NEO–Personality Inventory (NEO–PI–R; Costa & McCrae, 1992) and the Washington University Sentence Completion Test (WUSCT; Hy & Loevinger, 1996) to 120 university students on 2 separate occasions. Together, the five traits of the FFM significantly predicted item sum scores from the WUSCT (multiple R = .54). Unique linear relationships of Openness to Experience and Agreeableness with ego level demonstrated that the two theories proposed similar constructs. We argue that these two FFM dimensions have conceptual relevance to the cognitive and interpersonal aspects of the ego development construct. We draw further connections between these FFM dimensions, ego development, and human values.

Psychometric Properties of the Washington University Sentence Completion Test

The psychometric properties of the two halves the Washington University Sentence Completion Test (SCT) Form 81 were examined by comparing the fit of structural equation models representing parallel, tau-equivalent, and congeneric properties. Data for these models were based on item-sum scores for the two halves of the SCT and eight measures of aspects of ego development, the construct purportedly measured by the SCT. The data were from a sample of 265 adults. The results suggest that the parallel model provides both a parsimonious and good fit for the data. These results provide empirical justification for those users of the SCe who have the need for shorter, interchangeable, and reliable forms of the test.

Psychometric properties of Loevinger's Sentence Completion Test in an adult psychiatric outpatient sample.

Little research has been conducted on Loevinger's Washington University Sentence Completion Test of Ego Development in adult psychiatric outpatients. The measure is a promising method of assessing a construct of personality and character functioning that should be useful in research on psychopathology and in choosing treatment modalities. The data presented in this study address the question of the psychometric adequacy of the measure in this segment of the subject population. Specifically, estimates of interrater reliability, internal consistency, and test-retest reliability are presented for a sample of 42 adult outpatients. In addition, the relationship between total protocol ratings and item sum scores is explored.

Effects of modified instructions on the Washington University Sentence Completion Test of Ego Development.

This research project was designed to investigate the possibility that asking subjects to respond in a mature manner when they take the Washington University Sentence Completion Test of Ego Development (WUSCTED) would result in higher test scores and improve the test-retest reliability of the measure. The results showed that there was a significant increase in Total Protocol Ratings (TPRs) and item sums in the experimental group (n = 32) over the control group (n = 32). In addition, the experimental group spent more time and used significantly more words in its response than did the control group. The question of improved test-retest reliability remains only tentatively resolved. The item sum scores showed a significantly higher correlation for the experimental instruction than for the control, although the test-retest agreement between TPR levels was insignificantly different in the two instructional groups.