Carlos García-Forero

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Despite a hundred years of questionnaire testing, no consensus has been reached on the optimal number of response alternatives in rating scales. Differences in prior research may have been due to the use of various psychometric models (classical test theory, item factor analysis, and item response theory) and different performance criteria (reliability,(More)
There is confusion in the literature concerning the concept of impulsive aggression. Based on previous research, we hypothesize that impulsivity and aggression may be related, though not as closely as to consider them the same construct. So, our aim was to provide empirical evidence of the relationship between the impulsivity and aggressiveness constructs(More)
There is growing interest in the assessment of positive mental health as a global indicator of societal wealth. We aimed to adapt the Warwick–Edinburgh Mental Well-being scale (WEMWBS) into Spanish and to perform a preliminary evaluation of its metric properties. Forward and back-translations and cognitive debriefing were carried out. University students (n(More)
The objective was to obtain a standardized evaluation of available prostate cancer-specific quality of life instruments used in patients with early-stage disease. We carried out systematic literature reviews in the PubMed database to identify manuscripts which contained information regarding either the development process or metric properties of prostate(More)
o the Editor: he association between monoamine oxidase A (MA and antisocial behavior is not new (1,2). What is new notion that under certain conditions MAOA might be able o explain the link between these conditions and antisocial ehavior in adulthood (3). A few studies have given supp his association and interaction effect (4 – 6), but the emains(More)
Absolute goodness of fit – The discrepancy between a statistical model and the data at hand. Goodness-of-fit index – A numerical summary of the discrepancy between the observed values and the values expected under a statistical model. Goodness-of-fit statistic – A goodness-of-fit index with known sampling distribution that may be used in(More)
The assessment of aggressiveness and the prediction of aggression has become a relevant research and applied topic in Psychiatry and Psychology. There have been many attempts in order to get a fast and reliable tool to measure aggression. Buss and Durkee started the pathway, and recently Bryant and Smith developed a tool with an enormous potential, a(More)
We show how to test hypotheses for coefficient alpha in three different situations: (1) hypothesis tests of whether coefficient alpha equals a prespecified value, (2) hypothesis tests involving two statistically independent sample alphas as may arise when testing the equality of coefficient alpha across groups, and (3) hypothesis tests involving two(More)
When analyzing genetic data, Structural Equations Modeling (SEM) provides a straightforward methodology to decompose phenotypic variance using a model-based approach. Furthermore, several models can be easily implemented, tested, and compared using SEM, allowing the researcher to obtain valuable information about the sources of variability. This methodology(More)
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