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The work presented here uses an adjustment method to test the vertical-horizontal illusion across four different configurations: a cross-shape, an L-shape, an inverted-T and a rotated-T. We examine the modulatory role of the variables visual frame and direction of the adjustment on the illusory effect. Two experiments were performed, one with rectangular and one with curvilinear visual frames. Our data show that in both experiments, the size of the expected illusion increases from the cross-shape to the L-shape and from the L-shape to the inverted-T, where it reaches its maximum. In the rotated-T, the illusion reverses reaching a significant effect in the opposite direction. This pattern of results appears consistently across different experimental conditions, although the variability in the amount of illusory effect seems to be modulated by the intervention of the two variables examined. A dissection of the vertical-horizontal illusion has been carried out in terms of a two-factor explanation - anisotropy and bisection - interacting in different ways across configurations.

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<p>El presente trabajo examina una selección de obras teatrales del s. XVIII en las que concurren interrupciones, robos de turno, solapamientos, reinicios o dubitaciones que imitan la planificación sobre la marcha propia del discurso oral espontáneo. El análisis de estos fenómenos, en los que se reconoce un especial perfeccionamiento de la mímesis de la oralidad con respecto a épocas anteriores, pretende contribuir a mejorar nuestro conocimiento tanto sobre la historia de la oralidad fingida en español como sobre la lengua del siglo XVIII.</p><p>This work takes a deep look into a sample of theater pieces from the 18th century in which interruptions,<br />stealing of floor, overlaps, reboots and hesitations try to mimic ongoing planning in spontaneous<br />oral speech. Our analysis shows a remarkable improving in oral mimesis in comparison with preceding periods and tries to make a contribution to a better understanding both of the history of pretended orality in Spanish and of 18th century Spanish language.<br /><br /></p>

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