Responding to recent concerns about the reliability of the published literature in psychology and other disciplines, we formed the X-Phi Replicability Project (XRP) to estimate the reproducibility of experimental philosophy (osf.io/dvkpr). Drawing on a representative sample of 40 x-phi studies published between 2003 and 2015, we enlisted 20 research teams across 8 countries to conduct a high-quality replication of each study in order to compare the results to the original published findings. We found that x-phi studiesas represented in our samplesuccessfully replicated about 70% of the time. We discuss possible reasons for this relatively high replication rate in the field of experimental philosophy and offer suggestions for best research practices going forward.

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RESUMEN: Recientemente Casasanto y Lupyan (2015) han sostenido que no hay conceptos independientes del contexto: todos los conceptos serían construidos ad hoc en el momento de su instanciación. El presente artículo muestra que el marco de la cognición ad hoc puede caracterizarse mediante una teoría de similaridad conceptual, y distingue dos nociones de concepto -asociadas a diferentes fases de su ciclo de vida (almacenamiento e instanciación)-. Esta propuesta reúne virtudes de enfoques opuestos: (a) invariantista: la estabilidad del concepto almacenado permite acumular nueva información; (b) contextualista: la dependencia contextual del concepto instanciado explica nuestra capacidad de adaptación.Palabras clave: Conceptos, cognición ad hoc, dependencia contextual, teoría de prototipos.ABSTRACT: Recently, Casasanto and Lupyan (2015) have asserted that there are no context-independent concepts: all concepts are constructed ad hoc when they are instantiated. My aim is to show that the ad hoc cognition framework can be characterized by a similarity-based theory of concepts, and that two different notions of concept should be distinguished -which may be identified with two distinct stages of their life cycle (storage and instantiation). This approach brings together virtues from opposing views: (a) invariantist: stored concepts are stable enough to collect new information; (b) contextualist: instantiated concepts are context-dependent, what explains our adaptive ability to changing environments.

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This paper reports an experiment that investigates interpretive distinctions between two different expressions of generalization in Spanish. In particular, our aim was to find out when the distinction between generic statements (GS) such as Tigers have stripes and universally quantified statements (UQS) such as All tigers have stripes was acquired in Spanish-speaking children of two different age groups (4/5-year-olds and 8/9-year-olds), and then compare these results with those of adults. The starting point of this research was the semantic distinction between GS and UQS in that the former admit exceptions, unlike the latter. On the other hand, several authors have observed a Generic overgeneralization effect (GOG) consisting in allowing for UQS to be felicitous in the face of exceptions, thus proposing that this "error" stems from GS being defaults (simpler, more easily learned and processed). In the current paper we aimed to test the "Generics as Default" (GaD) hypothesis by comparing GS and UQS in three different age ranges. Our data show that, overall, the accuracy of GS is greater than the accuracy of UQS. Moreover, we also confirm a hypothesized interaction between age and NP type (GS vs UQS). Further, we present several data points that are not predicted by the GaD, including an observed decline in the accuracy of GS in the older group of children as well as in adults, and that children fail at rejecting statements that are not considered to be true generalizations.