RT Conference_Proceedings T1 Individual differences in deductive reasoning: Formal and Thematic Wason's THOG problems A1 Valiña García, María Dolores A1 Seoane Pesqueira, Gloria A1 Martín Rajo, Montserrat A1 Rodríguez González, María Soledad A1 Ferraces Otero, María José K1 Psychology K1 Psychology of thinking K1 Psychology of reasoning K1 Thog problem K1 Individual differences AB This study forms part of a wider research project aimed at investigating relationships between cognitive skills and performance on experimental reasoning tasks (Stanovich, 1999; Stanovich & West, 1998).The study aims to replicate and expand our previous studies of individualdifferences, both in conditional reasoning (Seoane, Valiña, Ferraces &Martín, 1997; Valiña, Seoane, Ferraces & Martín, 1993; 1995; 2000) anddisjunctive reasoning (Martín, Seoane, Valiña & Ferraces, 1998; Martín &Valiña, 2002; 2003).Specifically, this study centred on individual differences in areasoning task: The THOG problem (Wason, 1977; Wason & Brooks,1979). This is one of the tasks conceived by Peter Wason to “explore thenature of thought” (Evans & Johnson-Laird, 2003, p. 178).Concretely, the aims of this study were: (1) To investigate therelationships between the subjects´ performance on various computerizedtests of cognitive abilities and the subjects´ reasoning with the THOGproblem, and (2) to analyze the influence of rule content (formal anddifferent thematic versions of the task) and instructions (standard / oneother)on the subjects´ performance with the THOG problem YR 2003 FD 2003 LK http://hdl.handle.net/10347/10065 UL http://hdl.handle.net/10347/10065 LA eng NO This paper was presented at XIII Conference of the European Society for Cognitive Psychology. A posterior version was published in Psicothema (2007), 19 (2), 206 - 211 DS Minerva RD 28 abr 2026