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Positive implications of schizotypal personality have been discussed in the literature in the last few years, higher creativity being one of them. Specifically, positive and negative schizotypy dimensions have been respectively related to higher and lower creativity levels. However, a considerable amount of null associations between these two constructs have also been reported. This heterogeneity could be due to the multidimensionality of both constructs. The aim of this study is to go deeper into the general relationship between creativity and schizotypy, disentangling the associations between specific dimensions of these two constructs. We assessed schizotypy in a sample of 154 volunteers. They also filled out creative personality and creative products questionnaires. Regression analyses showed no effect of scores in the positive dimension of schizotypy over either of the two creativity measures. Interestingly, lower scores in the negative dimension were associated with more creative products, whereas lower scores in the disorganized dimension were associated with a more creative personality. Our results point toward the need to use assessment tools tapping into the different aspects of creativity and to take into account the multidimensional nature of schizotypal personality in order to clarify the relationship between these two complex constructs. [ABSTRACT FROM AUTHOR]

Grammatical effects in picture-word interference experiments have been argued to reflect grammatical constraints during lexicalisation. Alternative views hold that those effects derive from the coincidence of semantic and grammatical differences between candidates. We present three experiments conducted in Spanish. Semantic relatedness between target and distracters (related or unrelated), as well as grammatical class (nouns or verbs) and semantic domain (objects or actions) of the distracters were manipulated in infinitive or inflected action naming tasks. Whereas related action-words, but not object-nouns, produced longer reaction times irrespective of their grammatical class in the infinitive condition, only related verbs slowed latencies in the inflected condition. Our results suggest that speech production relies on the exclusion of candidate responses that do not fulfil task-pertinent criteria like membership in the appropriate semantic domain or grammatical class. Taken together, these findings are explained by a response-exclusion account of speech output. This and alternative hypotheses are discussed. [ABSTRACT FROM AUTHOR]