Acceso usuarios
Laura María Victoria Manoiloff, Leticia Vivas, Silvia Constanza Andreini, Nicolás Linares, Mercedes Soledad Fuentes Leiza, Laura Del Boca, Juan Segui
En la primera parte de este trabajo se presenta la construcción y el desarrollo de la Prueba Argentina Psicolingüística de Denominación de Imágenes (PAPDI). La misma tiene dos características que la diferencian de las pruebas actualmente disponibles en nuestro medio: (a) Los estímulos fueron seleccionados controlando las variables que afectan las etapas de análisis visual y reconocimiento de la imagen (Complejidad visual y Concordancia con la imagen) y el conocimiento conceptual (Variabilidad de la Imagen y Familiaridad) del dibujo del objeto también se manipularon las variables (Frecuencia léxica y Edad de adquisición) que afectan la etapa que busca evaluar la prueba: activación,selección y recuperación de la etiqueta léxica. Los índices que operacionalizan a las variables son dependientes de la cultura y de la lengua de dónde se obtengan, por ello se tomaron sus valores de normas argentinas.
(b) Las claves semánticas han sido elaboradas cuidadosamente, siguiendo las normas de producción de atributos semánticos también recolectadas en nuestro país, ya que el uso de las mismas permite generar hipótesis más precisas acerca de la localización del déficit. Por lo tanto, se presenta el proceso de construcción y desarrollo de la prueba mostrando cómo se tuvieron en cuenta estas particularidades, cuáles variables han sido controladas y cuáles manipuladas, y su justificación.
Por último, los resultados de la prueba piloto permitieron seleccionar 30 ítems y la constitución de la versión final de la prueba, que es lo suficientemente breve para su uso en la clínica y de libre acceso.
In the current paper, first part, we present the design and development of the Argentinean Psycholinguistic Image Naming Test (PAPDI). This test has two characteristics that make it different from those currently available in our country: (a) the stimuli have been selected by controlling the variables that affect the stages of visual analysis and image recognition (Visual Complexity and Image Agreement) and conceptual knowledge (Image Variability and Familiarity) of the drawing of the object; and the variables (Frequency of Use and Age of Acquisition) that affect the stage that seeks to evaluate the test were manipulated:
activation, selection and retrieval of the lexical label (phonological form of the name), to generate a gradient of difficulty in the items of the test.
However, the variable Naming Agreement, that also affects this stage, was controlled to selected pictures with only one predominating name. The quantification of these factors by means of specific variables is influenced by the cultural and linguistic context from which they were obtained, consequently we took their values from Argentinean normative data base and (b) semantic cues were elaborated according to semantic feature production norms also from Argentina. The phonological cues corresponded to the first syllable of the object's name. Their use allows to generate more precise hypotheses about the location of the deficit and allows to infer relevant information about the cognitive profile. Therefore, the process of construction and development of the test is presented, showing how these particularities were taken into consideration, which variables were controlled and which were manipulated, and their justification. For the design of the test 62, black and white pictures were originally selected from the 400 pictures taken from Cycowicz’s set (of frequent use in Experimental Psychology and Neuropsychology). They correspond to concrete concepts from different semantic categories belonging to both living and non living domains. The criteria used to include those images were that they were moderately complex (in quantity of lines and details), moderately familiar and that they had a mean image variability value. They had to have a medium to high concordance degree between the mental image and its corresponding representation. Besides, these images had to have a naming agreement superior to 80%. To conform the first version of the test, the 62 images selected were ordered according to the variableAge ofAcquisition and each image was assigned its corresponding semantic and phonological cues. The former were extracted from the Argentinean norms considering the most relevant features. The second consisted on the word´s first syllable. A pilot study with healthy population (n = 50), of different ages, both sexes and three educational levels, was carried out through which 30 images were selected that constituted the test´s final version.
The deleted items were: figures that did not evoke a univocal response, that is, they were easily confused with other objects; figures that had more than one acceptable answer although not all were correct; and items that presented a ceiling effect where the scores accumulated in high scores and did not allow to discriminate the participants' ability to select, retrieve and produce a word (only 25 and 30% of the items were retained). In the test´s final version, the items were reordered according to the Age of Acquisition and Frequency values and their difficulty in naming (following the percentage of successes in the spontaneous response). And images that were contain in another naming tests were deleted. The test is short enough for use in the clinic and freely accessible.
The second part of the paper presents the psychometric studies that provide evidence of their relevance and validity.
