Michele Lalla

THE INFLUENCE OF DEPRESSION ON MEMORY AND METAMEMORY IN THE ELDERLY

This study aimed to assess the relationships among depression level, memory and metamemory scores on a large sample of elderly subjects (139 men and 147 women). Preliminary examination showed that none of the sampled subjects had intellectual impairment (as assessed by means of the Mini-Mental State Examination) or neuropsychiatric symptoms. Each subject was administered the Randt Memory Test (RMT), the Sehulster Memory Scale (SMS) and the Geriatric Depression Scale (GDS). A Multivariate Analysis of Covariance revealed a negative influence of depression on the two RMT measures (Acquisition-Recall: AR; Delayed Memory: DM) and on the three SMS measures (Set1: self-comparison; Set2: memory complaints; Set3: peer comparison), and of age on AR and DM, and Set1 and Set2. A Multivariate Regression Analysis showed that DM scores were positively correlated with Set2 in men and women, and with Set1 in women and Set3 in men, whereas AR scores related to Set2 and Set3 in men and Set1 in women. In addition, depression influenced negatively Set1, Set2 and AR scores in both men and women and DM scores only in men. On the whole, the results suggest that depression, memory and metamemory are rather closely related in non-severely depressed older individuals, albeit with slightly different patterns in men and women, and that some areas of metamemory are congruent with objective functioning regardless of the level of depressive symptoms.

Self-rating and objective memory testing of normal and depressed elderly

This study aimed to assess the relationships between the scores of subjective assessment (metamemory) and those of performance testing for memory, on the one hand, and the level of depression, on the other. A hundred and eighty elderly subjects (102 women and 78 men; mean age 65.7 years) were selected for the study. They showed neither intellectual impairment (as assessed through Mini Mental State test: MMS) nor neuropsychiatric symptoms. Each subject was administered the Randt Memory Test (RMT) for performance testing, the Sehulster Memory Scale (SMS) for the subjective assessment, and the Geriatric Depression Scale (GDS). A MULTCOVA analysis showed that both age and the depression level are negatively correlated with both the measures (Acquisition-Recall: AR; Delayed Memory: DM) of the RMT. The scores of the second (memory complaints) of the three sets of SMS were positively correlated with those of AR and DM indices. A Multivariate Regression Analysis showed that in males age and the depression level were significant regressors for both AR and MD scores while in females only the depression level was a significant regressor for AR and only age was a significant regressor for DM. Our results suggest that a) the relationships between the depression level and memory functioning are close, although not fully homogeneous in men and women; and b) that the scores in some areas of metamemory parallel, independently of the level of depression, the performance outcomes of memory functioning. (Aging 2: 39–48, 1990)

Vagueness evaluation of the crisp output in a fuzzy inference system

Fuzzy models generally provide an output characterized by vagueness, which is expressed through a solution fuzzy set. In many applications, the response of the model is transformed in a crisp value through some defuzzification methods for solution fuzzy region, thus losing its fuzziness. Only to preserve a few indications of its vagueness, some indices summarizing the spread of the output membership function could be used to associate them with the crisp output, such as its standard deviation, the quartile deviation, the coefficients of skewness and kurtosis. The behaviour of such indices is examined in a large number of possible, though unlikely, output solutions and in an application of a fuzzy inference system for evaluating university teaching activity. The results seem to suggest that the 20-80 mid-percentile range could be a good measure of the vagueness dispersion, while the coefficient of skewness could provide a useful indication about the asymmetry of the solutions shape. Moreover, a rough estimate of dispersion was obtained from a triangle approximating the solution fuzzy region because the results were straightforwardly deduced from formulae involving the abscissae of its vertices. The results generally appear to underestimate the true values of the standard deviations; the 15-85 mid-percentile range of the approximating triangle seemed to be a more suitable rough appraisal of fuzzy output dispersion.

Risk factors and socioeconomic condition effects on periodontal and dental health: A pilot study among adults over fifty years of age

Objective: Observational studies on the association among systemic/general and oral cavity indices, tooth loss, periodontal conditions, and socioeconomic inequalities are to be still performed in the population of Southern Europe. This study aims to determine the extent of this relationship among Italian healthy adults 50 years of age and above. Materials and Methods: Socioeconomic and lifestyle characteristics, cardiovascular indicators, and systemic indices were examined by contrasting the dental indices among adult people of Northern Italy. Data were processed through correlation analysis, and multivariate analysis was carried out using seemingly unrelated regressions. Results: A total of 118 adults 50 years of age and above, after anamnesis, underwent systemic and dental examination. Their socioeconomic status was found to be inversely associated only with smoking and dental parameters. Unexpected outcomes between lifestyle and risk factors were detected. The statistical analysis showed an uneven correlation among dental indices and between those indices and the socioeconomic status, such as, a periodontal condition, apparently free from influences, unusually became worse as the socioeconomic status enhanced. Conclusions: The study outcomes indicate a relationship between tooth loss and conservative endodontic therapy, but they result in alternative choices. Nevertheless, the socioeconomic status has an inverse relationship with tooth loss and conservative endodontic therapy, but a direct relation with worsening of the periodontal condition. This pilot study highlights a need for the public health administration to adopt a socioeconomic assessment not only based on the household income, but also to accordingly improve its therapeutic course.

Web‐based versus paper‐based data collection for the evaluation of teaching activity: empirical evidence from a case study

The collection of teaching evaluation questionnaires in the traditional paper‐and‐pencil format is a costly and time‐consuming process and yet it is a common assessment practice in many university systems. web‐based data collection would reduce costs and significantly increase the efficiency of the overall evaluation process in numerous ways. Results for both types of surveys are reported from two years of progressive introduction of the web‐based survey by the University of Modena and Reggio Emilia, Italy. In the first year, two faculties representing scientific and humanistic fields were selected for a web‐based survey. In the second year, eight out of 12 faculties took part in the web survey. This data collection strategy allowed for responses from non‐attending students and facilitated a comparison of attitudes between attending and non‐attending students.

Students’ Evaluation of Teaching Effectiveness: Satisfaction and Related Factors

Student evaluation of teaching (SET) has been widely studied in the past century and considerable research has been devoted to investigate its reliability, validity, and unbiasedness [7, 25]. Often, the overall goal of the evaluations is to gauge teaching effectiveness, understood as the extent to which a given learning objective is accomplished. Effectiveness can be evaluated through (i) direct assessment of knowledge and skills acquired by the students or (ii) a questionnaire designed to survey students’ opinion about the teaching styles and behaviours of teachers and/or their satisfaction [34]. Since there is no universally accepted strategy to achieve the measurements of effectiveness, students’ ratings are usually employed as a primary source of data as they are easier to collect than measurements of learned knowledge/skills. As a consequence, they represent the basis for measuring not only teaching effectiveness, but also active participation and students’ attitude toward academic activity, which are critical factors for the success of any teaching system. However, it is often claimed that students’ evaluations do not reveal true teaching performance and can only gauge the satisfaction with their instructors.

Unemployment Duration: An Analysis of Incomplete, Completed, and Multiple Spells in Emilia-Romagna

Sets of incomplete and completed spells of unemployment wereobtained from the Italian Quarterly Labour Force Survey,carried out by ISTAT in Emilia-Romagna (1993:1–1995:1).The data were analysed through a proportional hazards modelwith a Weibull specification of the baseline hazard, includingboth unobserved heterogeneity applied to the scale parameterof the duration distribution, and telescoping effect to accountfor spikes in the distribution of unemployment spells.They were compared formally also with a non-proportional hazardmodel based on a log-logistic distribution of duration.The estimation of the parameters was carried out separately on bothcompleted spells and quarterly incomplete spells to ascertaindifferences and to envisage the potential seasonal effect.The results showed that the shape parameters changed over time.The parameters of each covariate proved to be statisticallystable over time and were also equal to the parameters ofthe completed spells model.Therefore, the analysis of incomplete spells is fairly feasiblewhen an even (closed form) baseline hazard function is suitablefor data.

Are periodontal outcomes affected by personality patterns? A 18-month follow-up study

Abstract Objectives: This research aims to study the relationship between personality traits and periodontal clinical outcomes by taking into account the level of anxiety and depression, periodontal health and oral hygiene behaviour of patients affected with gingivitis or moderate periodontitis requiring periodontal therapy. Material and methods: The periodontal data of 40 systemically healthy patients affected by gingivitis or moderate periodontitis were collected at baseline and 18 months later. The psychological variables, dental awareness and adherence intent of the patients were assessed through questionnaires, and only those patients that exhibited a higher degree of compliance were included in the study. The personality traits (cluster A: paranoid, schizoid, schizotypal; cluster B: borderline, antisocial, narcissistic, and histrionic; cluster C: avoidant, dependent, and obsessive-compulsive) and the level of anxiety and depression of the patients were assessed. Patients were instructed with oral hygiene measures and were treated with periodontal therapy. Results: Clusters A and B showed a consistent tendency for reduced levels of oral hygiene (increased full-mouth plaque score – FMPS). The results from cluster B were found to be significantly related to deep periodontal pockets at baseline. On the contrary, cluster C seemed to be linked to clinically better indices, particularly in terms of full-mouth-bleeding-score and pocket depth, both at baseline and 18 months later. The results collected from clusters B and C were directly correlated with anxiety, depression and FMPS. Moreover, anxiety was directly correlated with the patient’s need for professional oral-care. Conclusions: Personality traits appear to play a significant role in determining the therapeutic outcomes of periodontal therapy in themselves. Thus, it is ideal for several important psychological, affective or behavioural factors to be associated with various personality traits so as to orient the outcome of periodontal therapy.

Evaluation of Teaching Activity through a Fuzzy System1

Student evaluations of teaching staff are compulsory in Italian universities. The Ministry of University and Scientific and Technological Research proposed a questionnaire with items based on the four-point Likert scale and a traditional item-by-item analysis. A fuzzy inferential system is proposed to analyze the data collected through this questionnaire, for items with a four/five-point Likert scale. Fuzzy evaluation was set up with the support of “fuzzyTECH” by INFORM.

A Fuzzy Expert System for Evaluating University Teaching Efficiency

Abstract Student evaluations of university efficiency are compulsory for universities. The Italian Ministry of University and Scientific and Technological Research proposed a questionnaire with items based on the four-point Likert scale and a traditional item-by-item analysis for the evaluation of teaching staff activity. In this study, three split-ballot experiments were carried out to test the differences between the four-point and five-point Likert scale. Furthermore, the traditional analysis was compared with the results of the fuzzy expert system set up to achieve the same purpose. The fuzzy expert system yielded scores that proved to be generally higher but sometimes also lower than those obtained using the five/four-point Likert scale.