Search results for " modeling"
showing 10 items of 2411 documents
Skewness in individual stocks at different investment horizons
2002
Abstract This paper examines the (a)symmetry of several individual stock returns at different investment horizons: daily, weekly and monthly. While some asymmetries are observed in daily returns, they disappear almost completely in weekly and monthly returns. The explanation for this fact lies in the convergence to normality that takes place when the investment horizon increases. These features allow one to question several financial models; in particular, they question the preference for positive skewness as a factor for investments in stock markets.
The accumulation of problems of social functioning as a long-term process: Women and men compared
2000
Structural equation modelling was used to analyse the developmental processes involved in the accumulation of problems of social functioning from age 8 to age 36 in men ( n = 152) and women ( n = 145). The accumulation of risk factors in childhood and adolescence, including low control of emotions (aggressiveness and anxiety), school problems (poor adjustment, success, and motivation), and problems in the family (parental drinking and low socioeconomic status), predicted career instability, early timing of parenthood, and a sense of failure at age 27 in both sexes. Similarly, the accumulation of problems of social functioning (e.g. poor financial standing, poor intimate relationships, and d…
Resilience and Parental Burnout Among Finnish Parents During the COVID-19 Pandemic: Variable and Person-Oriented Approaches.
2021
During the coronavirus disease 2019 (COVID-19) crisis, different personality characteristics may have influenced parental well-being in different ways. In the present study, we combined variable and person-oriented approaches and examined relationships between resilience, parental burnout, and perfectionism during the lockdown. We first used structural equation modeling to assess the paths between variables. We then used latent profile analysis to examine different profiles of parents based on resilience, perfectionism, and symptoms of parental burnout. Finally, we examined how these profiles differ in terms of relevant background variables. The results showed that resilience predicted par…
Learning strategies explaining differences in reading proficiency. Findings of Nordic and Baltic countries in PISA 2009
2015
Abstract There are useful metacognitive learning strategies improving learning results significantly. Students can be trained to use them to achieve a higher level of proficiency in different academic domains, including reading. The current study was aimed to discover how student awareness and use of learning strategies explains differences in reading literacy test results, using PISA (the Program for International Student Assessment) 2009 data of three Nordic and three Baltic countries. The student level differences appeared partly due to the differences between schools, in the Baltic countries more than in the Nordic countries, which is considered a concern in the countries stating the eq…
The relationship between positive and negative affect in the Positive and Negative Affect Schedule
2002
Abstract The Positive and Negative Affect Schedule (PANAS; Watson, Clark, & Tellegen, 1988 ) is one of the most widely used affect scales. Nevertheless, the relation between its two scales, positive affect (PA) and negative affect (NA), is still controversial. Previous results that suggest independence between NA and PA were limited to manifest variables. In this study, the relation between PA and NA for both state and trait instructions was analyzed by means of structural equation modeling. Two hundred ninety-two participants responded to the PANAS at three occasions of measurement. No association was found between trait PA and NA, but significant negative correlations between state PA and…
Paired associate learning tasks and their contribution to reading skills
2016
Associative learning has been identified as one of several non-linguistic processes involved in reading acquisition. However, it has not been established whether it is an independent process that contributes to reading performance on its own or whether it is a process that is embedded in other linguistic skills (e.g., phonological awareness or phonological memory) and, therefore, contributing to reading performance indirectly. Research has shown that performance on tasks assessing associative learning, e.g., paired-associate learning (PAL) tasks, is lower in children with specific reading difficulties compared to typical readers. We explored the differential associations of two distinct ver…
Moderate-to-vigorous physical activity and personal well-being in European youth soccer players: Invariance of physical activity, global self-esteem …
2013
In this study, findings concerned with the association of self-reported global self-esteem, vitality and athletes' moderate-to-vigorous physical activity (MVPA) in young soccer players and the generalisability of these associations across different European populations are presented. After listwise exclusion of missing cases and the elimination of cases reporting less than a week of intensive physical activity, the sample of this analysis included 6796 athletes from France (N = 974), Greece (N = 1416), Norway (N = 1051), Spain (N = 2175) and England (N = 1180). Results from multi-sample structural equation modelling analyses provided evidence of invariance across countries for factor loadin…
From Technology to the Human User
2008
When thinking of users, it is possible to look at them from a variety of perspectives. One essential way of considering users within the human–technology environment involves technical concepts. In this manner, we define what users should be able to do with a particular technical system. As such, there are tasks to accomplish and goals to reach by means of some technology, and therefore specific operations must be carried out in order to reach those goals or fulfill those tasks. For example, if someone wishes to buy boots from an eShop, it is necessary to get onto the Internet, find the eShop, find the boots, load them into a virtual shopping cart, and follow the process to check out. Savvy…
I-states-as-objects-analysis (ISOA): Extensions of an approach to studying short-term developmental processes by analyzing typical patterns
2012
I-states-as-objects-analysis (ISOA) is a person-oriented methodology for studying short-term developmental stability and change in patterns of variable values. ISOA is based on longitudinal data with the same set of variables measured at all measurement occasions. A key concept is the i-state, defined as a person’s pattern of variable values at a specific time point. All i-states are first subjected to a classification analysis that results in a time-invariant classification characterized by a number of typical i-states. Each person is then characterized at each time point by the typical i-state he/she belongs to. Then the person’s sequences of typical i-states are analyzed with regard to …