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In response to recommendations to redefine statistical significance to p ≤ .005, we propose that researchers should transparently report and justify all choices they make when designing a study, including the alpha level.

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Speeded naming and lexical decision data for 1,661 target words following related and unrelated primes were collected from 768 subjects across four different universities. These behavioral measures have been integrated with demographic information for each subject and descriptive characteristics for every item. Subjects also completed portions of the Woodcock-Johnson reading battery, three attentional control tasks, and a circadian rhythm measure. These data are available at a user-friendly Internet-based repository (http://spp.montana.edu). This Web site includes a search engine designed to generate lists of prime-target pairs with specific characteristics (e.g., length, frequency, associative strength, latent semantic similarity, priming effect in standardized and raw reaction times). We illustrate the types of questions that can be addressed via the Semantic Priming Project. These data represent the largest behavioral database on semantic priming and are available to researchers to aid in selecting stimuli, testing theories, and reducing potential confounds in their studies.Keywords Semantic priming . Large database . Individual differences . Item differences The semantic priming projectThere is an extensive literature concerning the influence of semantic/associative context on word recognition (see McNamara, 2005;Neely, 1991). This work has been critical in developing a better understanding of the nature of semantic representations, lexical retrieval processes, automatic and attentional mechanisms, and differences across various populations. In the semantic priming paradigm, subjects are presented with a target word (e.g., table) for a speeded response (typically, pronunciation or lexical decision) that was immediately preceded by either a related (e.g., chair) or an unrelated (e.g., watch) prime word. The semantic priming effect refers to the consistent finding that people respond faster to target words preceded by related, relative to unrelated, primes.The vast majority of semantic priming studies have employed factorial experimental designs in which the effect of prime-target relatedness is crossed with another variable or variables to test for interactions in which the size of priming depends upon another variable or combination of variables. These other variables may include (1) target lexical characteristics

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