A psychometric analysis of the Early Trauma Inventory-Short Form in Colombia: CTT and Rasch model.

BACKGROUND: Potential childhood traumatic experiences increase risk for mental and physical health disorders and their precise assessment can help to promote health prevention and promotion strategies for countries with limited data and measurement strategies like Colombia. OBJECTIVE: The goal of the present study is to strengthen evidence for the validity of scores from an adapted version of the Early Trauma Inventory self report-short form (ETI-SF) using Item Response Theory and by assessing factorial invariance across gender and education level. PARTICIPANTS AND SETTING: The study assessed a total of 1909 Colombian participants (66.16 % women, 32.16 % men, 1.68 % other gender; age range 18-72 years old). METHODS: Participants answered the ETI-SF via a web-based sampling strategy. RESULTS: The total scores of the scale showed good reliability coefficients (α = 0.81 and ω = 0.60). A specific analysis for the subscales showed good reliability for the emotional, physical, and sexual trauma subscales (αs and ωs >0.64), while general trauma showed lower than accepted reliability values (α =0.56 and ω = 0.37). Most of the individual items of the scale showed good calibration. The factorial invariance analysis suggests the possibility of some gender and educational differences. CONCLUSIONS: The study confirms particularly high rates of potential childhood traumatic experiences in Colombia and complement data for specific trauma types. Overall, the ETI-SF is confirmed as useful for Colombia, which highlights this scale as a good tool to use for public health assessment. Future research can continue the integration of diverse methods for estimating the quality of the scale.

Aproximaciones evolutivas y psicopatología: Teoría de historia de vida y sistemas psicobiológicos en el trastorno de personalidad límite / Evolutionary approaches and psychopathology: Life history theory and psychobiological systems for borderline personality disorder

La psicología clínica requiere de constantes desarrollos científicos que lleven a una explicación de la complejidad de los trastornos mentales y sus bases causales. Las aproximaciones evolutivas han mostrado ser de particular poder heurístico para esta tarea. Entre ellas, la Teoría de Historia de Vida (THV) incorpora avances teóricos y empíricos novedosos y significativos. No obstante, existe la necesidad de incorporar investigación y aproximaciones evolutivas adicionales de interés. Por lo tanto, en este artículo se propondrá el potencial de integración al ampliar la causalidad evolutiva en conjunción con aproximaciones de sistemas psicobiológicos de conducta. Para esto se utilizará como ejemplo el Trastorno Límite de Personalidad, ampliando su comprensión como una interacción de causas próximas entre los sistemas psicobiológicos de estrés y apego, dentro del marco de causas últimas de THV. Finalmente, se demarcarán aspectos que nutren el campo clínico con implicaciones para la evaluación y los dominios de intervención.(AU)

Clinical psychology requires continuous research to encourage integrative explanations for the complexity of mental disorders and their underlying causes. Biological evolutionary approaches have shown particular heuristic power for this endeavor. Life history theory (LHT) is an evolutionary model that incorporates novel and significant theoretical and empirical advances. However, there is a growing need for the incorporation of other successful evolutionary approaches. Thus, the goal of the present paper is to propose potential integrative connections between evolutionary causal modes, behavior systems, and LHT. For this, borderline personality disorder is used as an example of a condition that can be understood as an interaction between stress and attachment psychobiological systems (proximate causes), within the framework of ultimate causes clarified by LHT. To conclude, we will outline several aspects that could enhance the clinical field with implications for assessment and intervention.(AU)

Development of Avocado Reference Material for Pesticide Residue Analysis.

BACKGROUND: Pesticide quantitation in foods relies on the availability of matrix reference materials, which, however, are scarce because of the general instability of pesticides. In particular, no avocado reference material has been developed. OBJECTIVE: This research aimed to develop a reference material to support the determination of pesticide residues in avocado. METHOD: Avocado was spiked with 11 selected pesticides at levels of 0.01-0.35 mg/kg. The production process included the assessment of between-unit heterogeneity, stability during dispatch, and best storage conditions according to ISO 17034. Reference values were estimated through an interlaboratory comparison study involving laboratories of demonstrated competence and adhering to ISO/IEC 17025. The corresponding expanded uncertainties were calculated as 4-19% in compliance with the Guide to the Expression of Uncertainty in Measurement. RESULTS: The reference material was sufficiently homogeneous and stable at 4°C during the entire study period (365 days) for most of the pesticides, and at 40°C during 10 days, but it was unstable at 50 and 60°C during 10 days. Four pesticides showed downward trends; however, this behavior was considered in the uncertainty budget. As this material complied with all requirements of proficiency testing, it was used in an interlaboratory proficiency test designed to investigate analytical performance and assist laboratories in improving the quality of measurement results. CONCLUSIONS: The presented material can be used for the development of novel analytical methods or in-house reference materials and adds to the scarce supply of reference materials for the determination of pesticides in vegetable matrixes with high oil contents and intermediate water contents. HIGHLIGHTS: A novel reference material has been developed for the reliable and accurate quantitation of multiple pesticides in avocado, allowing researchers to avoid the preparation of in-house reference materials for this purpose.

Flexibilidad relacional y estrés parental / Relational Flexibility and Parental Stress

El objetivo de este estudio fue evaluar la relación entre niveles altos y moderados de estrés parental y relaciones derivadas, en una muestra de padres y estudiantes de pregrado. Para este estudio se utilizó un diseño de comparación entre grupos con una medida pretest. La muestra total se dividió en tres grupos, trece padres con niveles altos en el Índice de Estrés Parental (IEP) fueron asignados a un grupo, otros trece padres con puntajes moderados en el IEP se asignaron a un segundo grupo y trece estudiantes de pregrado fueron asignados a un grupo control. Inicialmente, todos los participantes fueron expuestos a un video de un niño presentando conductas disruptivas. Seguido de esto, todos los participantes fueron expuestos a un procedimiento de entrenamiento en discriminaciones condicionales A-B y A-C; el grupo de estímulos A correspondía a figuras sin sentido, el grupo B a conductas disruptivas de los niños y el grupo C de estímulos a conductas positivas de los padres. Luego se entrenaron relaciones mixtas (A-B y A-C), y finalmente se evaluaron relaciones de transitividad y equivalencia. Los resultados muestran que los participantes con estrés alto presentaron menor precisión de respuesta y mayores latencias de respuesta en las relaciones derivadas, comparado con el grupo de estrés moderado y control. Lo anterior indica que los padres que presentan altos niveles de estrés parental tienen mayor dificultad para establecer nuevas relaciones de estímulos, especialmente aquellos con valencia emocional. Estos resultados tienen implicaciones a nivel clínico, específicamente en la flexibilidad relacional.

The aim of this study was to evaluate the relationship between higher and moderate parental stress scores and derived relations in parents and undergraduate students. A group comparison design with a pretest measure was used in this study. The sample size was divided in three different groups, thirteen parents with high scores on the Parental Stress Index (PSI) were assigned to one group, other thirteen parents with moderate scores on the PSI were assigned to a second group, and thirteen undergraduate students were assigned to a control group. Initially all participants were exposed to a video of a child exhibiting disruptive behaviors. Following this all participants were exposed to a conditional discrimination training A-B and A-C, one stimulus set A corresponded to nonsense figures, a second stimulus set B corresponded to children's disruptive behaviors, and the set C to positive parenting behaviors. Then mixed relations (A-B and A-C) were trained followed by transitivity and equivalence tests. The results show that participants with high scores on the PSI exhibited low response accuracy and longer response latencies during derived relations compared to the control group and moderate stress. These results suggest that parents with high PSI scores, have greater difficulty in establishing new relations between stimuli, especially stimuli loaded with emotional value. These findings have implications at clinical level, specifically in relational flexibility.

Necesidades metrológicas en los laboratorios clínicos / Metrological needs in clinical laboratories / Necessidades metrológicas nos laboratórios clínicos

Los resultados generados por los laboratorios clínicos son elementos claves para el diagnóstico y tratamiento de enfermedades, así como para el seguimiento de los pacientes, por lo tanto se requiere un control metrológico sobre el proceso de medición, el cual determinará el grado de comparabilidad y de confianza requerido sobre los resultados obtenidos. Esta revisión aborda el tema de comparabilidad de las mediciones y de cómo ésta se ve influenciada por factores como la conmutabilidad de los materiales de referencia, los métodos de medición, la disponibilidad de materiales y procedimientos de referencia, además de los intervalos de referencia y límites de decisión para un mensurando en particular. Finalmente se exponen cuáles son los mecanismos adoptados que permitirán garantizar la comparabilidad de las mediciones en esta área.

The results produced by clinical laboratories are key elements in the diagnosis and treatment of diseases and to monitor patients, so, it requires a metrological control over the measurement process, which will determine the degree of comparability and trust required on the obtained measurement results. Therefore, in this paper we discuss about the comparability of measurements and how it is influenced by factors such as commutability of reference materials, measurement methods, availability of materials and reference procedures, in addition to reference intervals and decision limits for a particular measurand. Finally it is exposed what are the mechanisms that allow ensure measurements comparability on this area.

Os resultados gerados pelos laboratórios clínicos são elementos chaves para o diagnóstico e tratamento de doenças, assim como para o seguimento dos pacientes, sendo preciso um controle metrológico sobre o processo de medição, que determina o grau de comparabilidade e confiança requerido sobre os resultados obtidos. Neste documento trata-se o tópico de comparabilidade das medições e de como a mesma se encontra influenciada por fatores como a comutatividade dos materiais de referência, os métodos de medição, a disponibilidade de materiais e procedimentos de referência, além dos intervalos de referência e limites de decisão para um mensurando em particular. Finalmente, são expostos quais são os mecanismos adotados que permitirão garantir a comparabilidade das medições nesta área.